| This is our first abridged draft of the Flora of Dukes County, which will form the backbone of a more detailed, extensive hard-copy publication. We hope to maintain this digital version of the Flora as an iterative, living document that reflects the dynamic nature of our landscape, to be updated annually as new taxa are observed, taxonomy shifts, and conservation statuses change. Future iterations of this list will include habitat information, more extensive taxonomic notes, and other data. Taxa with occurrences verified by physical plant vouchers will list "PHARB" or "CNH" in the righthand column. The code "PHARB" indicates there is a voucher in the Polly Hill Arboretum Herbarium; the code "CNH" indicates a voucher does not exist at PHARB, but can be found at a member institution of the Consortium of Northeast Herbaria. The complete absence of a code indicates there is no verifiable physical record of a taxon's occurrence, and that its inclusion in the Flora is based only on the trusted observation of a credible source. Any taxa which have not been observed since the year 2000 are considered to be of "historic" status. Collector's initials: EH: Erin Hepfner EL: Elizabeth Loucks ET: Elizabeth Thomas GP: Gregory Palermo JR: Julie Russell KF: Kristen Fauteux MC: Margaret Curtin MDC: Melissa Dow Cullina TB: Timothy Boland For a complete key to this document, please refer to the "The Flora of Dukes County" page on the Polly Hill Arboretum website. | ||||
Lycopodiaceae | ||||
| Dendrolycopodium hickeyi (W.H. Wagner, Beitel, & Moran) A. Haines [Lycopodium hickeyi W.H. Wagner, Beitel, & Moran] Hickey's Tree-clubmoss County Record (GP #17-168) | Native Rare PHARB | |||
| Dendrolycopodium obscurum (L.) A. Haines [Lycopodium obscurum L.] Ground or Princess Pine | Native Rare PHARB | |||
| Diphasiastrum digitatum (Dill. ex A. Braun) Holub [Lycopodium complanatum var. flabelliforme Fern.] Southern Ground Cedar, Fan Clubmoss | Native Historic PHARB | |||
| Diphasiastrum tristachyum (Pursh) Holub [Lycopodium tristachyum Pursh] Slender or Wiry Ground Cedar | Native Historic CNH | |||
| Huperzia lucidula (Michaux) Trev. [Lycopodium lucidulum Michaux] Shining Clubmoss | Native Unknown | |||
| Lycopodiella appressa (Chapman) Cranfill [Lycopodium appressum (Chapman) Lloyd & Underwood] Southern or Bog Clubmoss | Native Rare PHARB | |||
| Lycopodiella inundata (L.) Holub [Lycopodium inundatum L.] Northern Bog Clubmoss | Native Historic CNH | |||
| Lycopodium clavatum L. Common Clubmoss | Native Historic PHARB | |||
Isoetaceae | ||||
| Isoetes acadiensis Kott Acadian Quillwort County Record (GP #20-226) | Native Rare PHARB | |||
| Isoetes tuckermanii A. Br. ex Engelm. Tuckerman's Quillwort | Native Historic CNH | |||
Ophioglossaceae | ||||
| Botrychium dissectum Sprengel [Botrychium dissectum var. obliquum (Muhl. ex Willd.)] Cut-leaved Grapefern | Native Rare CNH | |||
| Botrychium multifidum (Gmelin) Rupr. [Botrychium multifidum var. intermedium (D.C. Eaton)] Leathery Grapefern | Native Historic PHARB | |||
| Botrychium oneidense (Gilbert) House Blunt-lobed Grapefern | Native Historic CNH | |||
| Ophioglossum pusillum Raf. [Ophioglossum vulgatum var. pseudopodum (Blake) Farw.] Adder's Tongue Fern | Native, Threatened Historic CNH | |||
Equisetaceae | ||||
| Equisetum arvense L. Common Horsetail | Native Occasional PHARB | |||
Osmundaceae | ||||
| Osmunda claytoniana L. Interrupted Fern | Native Rare PHARB | |||
| Osmunda regalis var. spectabilis (Willd.) Gray Royal Fern | Native Occasional PHARB | |||
| Osmundasterum cinnamomea L. C. Presl [Osmunda cinnamomea L.] Cinnamon Fern | Native Common PHARB | |||
Dennstaedtiaceae | ||||
| Dennstaedtia punctilobula (Michaux) T. Moore Hay-scented Fern | Native Abundant PHARB | |||
| Pteridium aquilinum ssp. latiusculum (Desv.) Hultén Bracken Fern | Native Common PHARB | |||
| Pteridium aquilinum ssp. pseudocaudatum (Clute) Hultén Pine Barrens Bracken Fern | Native, Watch List Uncommon PHARB | |||
Aspleniaceae | ||||
| Asplenium platyneuron (L.) B.S.P. Ebony Spleenwort | Native Uncommon PHARB | |||
Woodsiaceae | ||||
| Athyrium angustum (Willd.) C. Presl. [Athyrium filix-femina var. angustum (Willd.) Lawson] Northern Lady Fern | Native Common PHARB | |||
| Athyrium asplenioides (Michx.) Desv. [Athyrium filix-femina var. asplenioides (Michaux) Farw.] Southern Lady Fern | Native, Watch List Historic PHARB | |||
Thelypteridaceae | ||||
| Parathelypteris noveboracensis (L.) Nieuwl. [Thelypteris noveboracensis (L.) Nieuwl.] New York Fern | Native Common PHARB | |||
| Parathelypteris simulata (Davenport) Holttum [Thelypteris simulata (Davenp.) Nieuwl.] Massachusetts Fern | Native Occasional PHARB | |||
| Phegopteris connectilis (Michaux) Watt [Thelypteris phegopteris (L.) Slosson] Northern or Narrow Beech Fern | Native Rare PHARB | |||
| Thelypteris palustris var. pubescens (Lawson) Fern. Marsh Fern | Native Common PHARB | |||
Blechnaceae | ||||
| Woodwardia areolata (L.) T. Moore [Lorinseria areolata (L.) Presl.] Netted Chain Fern | Native Common PHARB | |||
| Woodwardia virginica (L.) Smith Virgina Chain Fern | Native Uncommon PHARB | |||
Onocleaceae | ||||
| Onoclea sensibilis L. Sensitive Fern | Native Common PHARB | |||
Dryopteridaceae | ||||
| Dryopteris ×boottii (Tuckerman) Underw. [Dryopteris cristata × D. intermedia] Boott's Wood Fern | Native Unknown PHARB | |||
| Dryopteris ×triploidea Wherry Fruitful Wood Fern County Record (GP #20-184) | Native Rare PHARB | |||
| Dryopteris ×uliginosa (A. Br. ex Dowell) Druce [Dryopteris carthusiana × D. cristata] Swamp Wood Fern | Native Historic | |||
| Dryopteris carthusiana (Vill.) H.P. Fuchs [Dryopteris spinulosa (O.F. Muell.) Watt] Spinulose Wood Fern | Native Occasional PHARB | |||
| Dryopteris cristata (L.) A. Gray Crested Wood Fern | Native Uncommon PHARB | |||
| Dryopteris intermedia (Muhl. ex Willd.) Gray Evergreen Wood Fern County Record (NB #199) | Native Occasional PHARB | |||
| Dryopteris marginalis (L.) A. Gray Marginal Wood Fern | Native Rare PHARB | |||
| Polystichum acrostichoides (Michaux) Schott Christmas Fern | Native Rare PHARB | |||
Polypodiaceae | ||||
| Polypodium virginianum L. Common Polypody | Native Rare PHARB | |||
Pinaceae | ||||
| Larix decidua P. Miller European Larch | Introduced Rare PHARB | |||
| Picea abies (L.) Karsten Norway Spruce | Introduced Uncommon PHARB | |||
| Picea glauca (Moench) Voss White Spruce | Introduced Common PHARB | |||
| Pinus banksiana Lamb. Jack Pine | Introduced Unknown | |||
| Pinus resinosa Aiton Red Pine | Introduced Uncommon | |||
| Pinus rigida Miller Pitch Pine | Native Abundant PHARB | |||
| Pinus strobus L. White Pine | Introduced Common CNH | |||
| Pinus sylvestris L. Scotch Pine | Introduced Uncommon PHARB | |||
| Pinus thunbergii Parl. [Pinus thunbergiana Franco] Japanese Black Pine County Record (GP #20-283) | Introduced Uncommon PHARB | |||
Cupressaceae | ||||
| Chamaecyparis thyoides (L.) B.S.P. Atlantic White Cedar | Native Rare PHARB | |||
| Juniperus communis var. depressa Pursh Common or Pasture Cedar | Introduced Occasional PHARB | |||
| Juniperus virginiana var. virginiana L. Eastern Red Cedar | Introduced Abundant PHARB | |||
| Thuja occidentalis L. Arbor Vitae, Northern Red Cedar | Introduced Rare PHARB | |||
Nymphaeaceae | ||||
| Brasenia schreberi J.F. Gmelin Water Shield | Native Rare PHARB | |||
| Nuphar variegata Durand ex Clinton Spatterdock, Yellow Water-lily | Native Rare PHARB | |||
| Nymphaea odorata Aiton [Nymphaea odorata var. gigantea Tricker] Spatterdock, Yellow Water-lily | Native Occasional PHARB | |||
Aristolochiaceae | ||||
| Isotrema macrophylla Large-leaved Dutchman's Pipe County Record (GP #17-10) | Introduced Rare PHARB | |||
Calycanthaceae | ||||
| Calycanthus floridus var. floridus L. Eastern Sweetshrub | Introduced Waif | |||
Lauraceae | ||||
| Lindera benzoin (L.) Blume Spicebush | Native Occasional PHARB | |||
| Sassafras albidum (Nutt.) Nees [Sassafras albidum var. molle (Raf.) Fern.] Sassafras | Native Common PHARB | |||
Acoraceae | ||||
| Acorus americanus (Raf.) Raf. [Acorus calamus var. americanus Raf.] Sweetflag | Native Historic CNH | |||
| Acorus calamus L. Single-veined Sweetflag | Introduced Historic CNH | |||
Araceae | ||||
| Arisaema triphyllum ssp. pusillum (Peck) Huttleston [Arisaema pusillum (Peck) Nash] Dwarf Jack-in-the-Pulpit | Native Historic CNH | |||
| Arisaema triphyllum ssp. stewardsonii (Britton) Huttleston [Arisaema stewardsonii Britton] Swamp Jack-in-the-Pulpit | Native Rare PHARB | |||
| Arisaema triphyllum ssp. triphyllum (L.) Schott ex Schott & Endl. [Arisaema atrorubens (Aiton) Blume] Woodland Jack-in-the-Pulpit | Native Occasional PHARB | |||
| Lemna minor L. Duckweed | Native Common PHARB | |||
| Lemna minuta Kunth Least Duckweed | Introduced Rare PHARB | |||
| Peltandra virginica (L.) Schott ex Schott & Endl. Arrow Arum | Native Historic PHARB | |||
| Spirodela polyrrhiza (L.) Schleiden Greater Duckweed | Native Rare PHARB | |||
| Symplocarpus foetidus (L.) Salisb. ex Nutt. Skunk Cabbage | Native Common PHARB | |||
| Wolffia borealis (Engelm. ex Hegelm.) Landolt [Wolffia punctata auct. non Griseb.] Northern Water-meal County record (MDC 2010) | Native, Watch List Rare | |||
| Wolffia brasiliensis Weddell [Bruniera punctata (Griseb.) Nieuwl.] Brazilian Water-meal County record (GP #18-167) | Native Rare PHARB | |||
Hydrocharitaceae | ||||
| Najas flexilis (Willd.) Rostk. & Schmidt Common Waternymph | Native Historic CNH | |||
| Najas gracillima (A. Braun) Magnus Slender Waternymph Previously historic, re-established in 2009 (MDC #1715) | Native Rare PHARB | |||
| Najas guadalupensis ssp. guadalupensis (Spreng.) Magnus Guadalupe Waternymph | Native Occasional PHARB | |||
| Najas guadalupensis ssp. olivacea (Rosend. & Butters) Haynes Guadalupe Waternymph County Record (GP #20-195) | Native Occasional PHARB | |||
| Vallisneria americana Michaux Tape Grass, Wild Celery | Native Uncommon PHARB | |||
Alismataceae | ||||
| Alisma subcordatum Raf. Southern Water-plantain County Record (GP #21-82) | Native Rare PHARB | |||
| Alisma triviale Pursh Northern Water-plantain County Record (GP #18-120) | Native Rare PHARB | |||
| Sagittaria engelmanniana J.G. Small Engelmann's Arrowhead | Native Historic CNH | |||
| Sagittaria graminea Michaux Grass-leaf Arrowhead | Introduced Rare PHARB | |||
| Sagittaria latifolia Willd. [Sagittaria latifolia var. obtusa (Muhl.) Wieg.] Common Arrowhead, Duck Potato | Native Rare PHARB | |||
| Sagittaria teres S. Watson Pondshore or Quill-leaved Arrowhead | Native, Special Concern Unknown | |||
Juncaginaceae | ||||
| Triglochin maritima L. Saltmarsh Arrow-grass | Native Historic CNH | |||
Ruppiaceae | ||||
| Ruppia maritima L. Ditch Grass, Widgeon Grass | Native Occasional PHARB | |||
Zosteraceae | ||||
| Zostera marina L. Eel-grass | Native Occasional PHARB | |||
Potamogetonaceae | ||||
| Potamogeton berchtoldii Fieber [Potamogeton pusillus var. tenuissimus Mert. & Koch] Slender Tiny Pondweed | Native Occasional PHARB | |||
| Potamogeton bicupulatus Fern. [Potamogeton capillaceus Poiret] Hairlike Pondweed | Native Rare PHARB | |||
| Potamogeton epihydrus Raf. [Potamogeton epihydrus var. ramosus (Peck) House] Ribbon-leaf or Surface Pondweed | Native Common PHARB | |||
| Potamogeton foliosus ssp. foliosus Raf. Leafy Pondweed | Native Historic | |||
| Potamogeton gramineus L. [Potamogeton gramineus var. maximus Morong] Grass-leaf Pondweed | Native Unknown | |||
| Potamogeton natans L. Floating Pondweed | Native Unknown | |||
| Potamogeton oakesianus Robbins Oakes' Pondweed | Native Rare PHARB | |||
| Potamogeton perfoliatus L. [Potamogeton perfoliatus var. bupleuroides (Fern.) Farw.] Clasping Pondweed, Redhead Grass | Native Occasional PHARB | |||
| Potamogeton pulcher Tuckerman Spotted Pondweed | Native Historic PHARB | |||
| Potamogeton pusillus L. Tiny Pondweed | Native Rare PHARB | |||
| Stuckenia pectinata (L.) Börner Sago False Pondweed | Native Rare PHARB | |||
| Zannichellia palustris L. [Zannichellia palustris major (Hartman) W.D.J. Koch] Horned Pondweed | Native Rare PHARB | |||
Nartheciaceae | ||||
| Aletris farinosa L. Colicroot | Native, Watch List Occasional PHARB | |||
Colchicaceae | ||||
| Uvularia sessilifolia L. Little Merrybells, Wild Oats | Native Occasional PHARB | |||
Smilacaceae | ||||
| Smilax glauca Walt. [Smilax glauca var. leurophylla Blake] Sawbrier | Native Occasional PHARB | |||
| Smilax herbacea L. Carrion-flower, Jacob's Ladder | Native Uncommon PHARB | |||
| Smilax rotundifolia L. Common Greenbrier, Catbrier, Bullbrier | Native abundant PHARB | |||
Liliaceae | ||||
| Lilium lancifolium Thunb. Lance-leaved Tiger Lily County Record (GP #16-104) | Introduced Rare PHARB | |||
| Lilium philadelphicum L. Wood Lily | Native Uncommon PHARB | |||
| Lilium superbum L. Turk's Cap Lily | Native Rare CNH | |||
| Medeola virginiana L. Indian Cucumber Root | Native Uncommon PHARB | |||
Orchidaceae | ||||
| Arethusa bulbosa L. Arethusa, Dragon's Mouth | Native, Threatened Rare PHARB | |||
| Calopogon tuberosus (L.) B.S.P. Grass-pink | Native, Watch List Rare PHARB | |||
| Corallorhiza maculata (Raf.) Raf. Spotted Coralroot | Native Historic CNH | |||
| Cypripedium acaule Aiton Pink Lady's Slipper, Moccasin-flower | Native Common PHARB | |||
| Epipactis helleborine (L.) Crantz Helleborine | Introduced Common PHARB | |||
| Goodyera pubescens (Willd.) R. Br. Downy Rattlesnake Plantain | Native Rare PHARB | |||
| Isotria verticillata (Willd.) Raf. Large Whorled Pogonia | Native, Watch List Unknown CNH | |||
| Liparis loeselii (L.) L. C. Rich. Loesel's or Green Twayblade, Fen Orchid | Native, Watch List Historic | |||
| Malaxis bayardii Fern. Bayard's Adder's Mouth | Native, Endangered Rare | |||
| Malaxis unifolia Michaux Green Adder's Mouth | Native, Threatened Unknown | |||
| Neottia bifolia (Wieg.) Szlach. [Listera australis Lindl.] Southern Twayblade | Native, Threatened Rare | |||
| Platanthera blephariglottis var. blephariglottis (Willd.) Lindley [Habenaria blephariglottis (Willd.) Hooker] White-fringed Orchis | Native, Watch List Rare | |||
| Platanthera clavellata (Michaux) Luer [Habenaria clavellata (Michaux) Sprengel] Clubspur Orchis | Native Uncommon PHARB | |||
| Platanthera flava var. herbiola (R. Br.) Luer [Habenaria flava var. herbiola (R. Ames & Correll] Pale-green or Tubercled Orchis | Native, Threatened Unknown | |||
| Platanthera grandiflora (Bigelow) Lindley [Habenaria fimbriata (Aiton R.) Br.] Large Purple-fringed Orchis | Native, Watch List Historic | |||
| Platanthera lacera (Michaux) G. Don [Habenaria lacera (Michaux) Lodd.] Ragged-fringed Orchis | Native Occasional PHARB | |||
| Platanthera orbiculata (Pursh) Lindley [Habenaria orbiculata (Pursh) Torrey] Round-leaved Orchis | Native, Watch List Unknown | |||
| Platanthera psycodes (L.) Lindley [Habenaria psycodes (L.) Sprengel] Small Purple-fringed Orchis | Native Unknown | |||
| Pogonia ophioglossoides (L.) Ker-Gawler Rose Pogonia, Snakemouth | Native Rare PHARB | |||
| Spiranthes cernua (L.) L. C. Rich. Nodding Ladies' Tresses | Native Occasional PHARB | |||
| Spiranthes lacera var. gracilis (Bigelow) Luer [Spiranthes gracilis (Bigelow) Beck] Southern Slender Ladies' Tresses | Native Uncommon PHARB | |||
| Spiranthes lacera var. lacera (Raf.) Raf. Northern Slender Ladies' Tresses | Native Uncommon PHARB | |||
| Spiranthes tuberosa Raf. [Spiranthes tuberosa var. grayi (Ames) Fern.] Little Ladies' Tresses | Native, Watch List Occasional PHARB | |||
| Spiranthes vernalis Engelm. & A. Gray Spring or Early Ladies' Tresses | Native, Threatened Uncommon PHARB | |||
| Spiranthes ochroleuca (Rydb.) Rydb. Yellow Ladies' Tresses County Record (EL 2021) | Native Rare | |||
| Tipularia discolor (Pursh) Nutt. Cranefly Orchid | Native, Endangered Rare PHARB | |||
Hypoxidaceae | ||||
| Hypoxis hirsuta (L.) Cov. Yellow Stargrass | Native Occasional PHARB | |||
Iridaceae | ||||
| Iris prismatica Pursh Slender Blue Flag | Native, Watch List Uncommon PHARB | |||
| Iris pseudacorus L. Yellow Iris, Water-flag | Introduced, Invasive Occasional PHARB | |||
| Iris versicolor L. Northern Blue Flag | Native Common PHARB | |||
| Sisyrinchium angustifolium P. Miller [Sisyrinchium bermudiana L.] Stout Blue-eyed Grass | Native Occasional PHARB | |||
| Sisyrinchium atlanticum Bicknell Eastern Blue-eyed Grass | Native Occasional PHARB | |||
| Sisyrinchium fuscatum Bicknell [Sisyrinchium arenicola Bicknell] Sandplain Blue-eyed Grass | Native, Special Concern Occasional PHARB | |||
| Sisyrinchium montanum var. crebrum Fern. Meadow Blue-eyed Grass | Native Occasional PHARB | |||
Amaryllidaceae | ||||
| Allium sativum L. Garlic | Introduced Historic CNH | |||
| Allium vineale L. Field Garlic, Scallion | Introduced Common PHARB | |||
| Galanthus nivalis L. Snow-drop County Record (GP #17-02) | Introduced Rare PHARB | |||
Hemerocallidaceae | ||||
| Hemerocallis fulva (L.) L. Day-Lily County Record (GP #17-47) | Introduced Rare PHARB | |||
Amaryllidaceae | ||||
| Narcissus poeticus L. Poet's Daffodil County Record (GP #21-07) | Introduced PHARB | |||
| Narcissus pseudonarcissus L. Wild Daffodil | Introduced Occasional PHARB | |||
Hyacinthaceae | ||||
| Chionodoxa forbesii Baker Glory of the Snow County Record (GP #18-01) | Introduced Rare PHARB | |||
| Muscari neglectum Guss. ex Ten. Common Grape Hyacinth County Record (GP #17-04) | Introduced Uncommon PHARB | |||
| Ornithogalum umbellatum L. Star-of-Bethlehem | Introduced Rare CNH | |||
Agavaceae | ||||
| Yucca filamentosa L. [Yucca flaccida Haw.] Yucca, Spanish Bayonet, Adam's Needle | Introduced Occasional PHARB | |||
Asparagaceae | ||||
| Asparagus officinalis L. Asparagus | Introduced Occasional PHARB | |||
Ruscaceae | ||||
| Convallaria majalis L. Lily-of-the-Valley | Introduced Occasional PHARB | |||
| Maianthemum canadense Desf. Canada Mayflower, False Lily-of-the-Valley | Native Common PHARB | |||
| Maianthemum racemosum ssp. racemosum (L.) Link [Smilacina racemosa (L.) Desf.] False Solomon's Seal | Native Occasional PHARB | |||
| Maianthemum stellatum (L.) Link Starry Solomon's Seal | Native Occasional PHARB | |||
| Polygonatum biflorum (Walt.) Ell. King Solomon's-seal County Record (GP #20-35) | Native Rare PHARB | |||
| Polygonatum pubescens (Willd.) Pursh Solomon's Seal | Native Uncommon PHARB | |||
Typhaceae | ||||
| Sparganium americanum Nutt. Common Bur-reed | Native Occasional PHARB | |||
| Sparganium androcladum (Engelm.) Morong Shining Bur-reed | Native, Watch List Historic CNH | |||
| Sparganium eurycarpum Engelm. ex A. Gray Giant or Broad-fruited Bur-reed | Native Rare PHARB | |||
| Typha ×glauca Godron Hybrid Cattail | Native Historic CNH | |||
| Typha angustifolia L. Narrow-leaved Cattail | Native Occasional PHARB | |||
| Typha latifolia L. Broad-leaved or Common Cattail | Native Common PHARB | |||
Xyridaceae | ||||
| Xyris difformis var. difformis Chapman Yellow-eyed Grass | Native Rare PHARB | |||
| Xyris torta Small Twisted Yellow-eyed Grass | Native Rare PHARB | |||
Eriocaulaceae | ||||
| Eriocaulon aquaticum (Hill) Druce [Eriocaulon septangulare With.] Pipewort, White Buttons | Native Occasional PHARB | |||
Juncaceae | ||||
| Juncus acuminatus Michaux Sharp-fruited Rush | Native Common PHARB | |||
| Juncus ambiguus Guss. [Juncus bufonius var. halophilus Buch. & Fern.] Seaside Toad-rush | Native, Watch List Unknown | |||
| Juncus anthelatus (Wieg.) R.E. Brooks Wiegand's Rush | Native Occasional PHARB | |||
| Juncus articulatus L. Jointed Rush | Native Rare PHARB | |||
| Juncus bufonius L. Toad Rush | Native Uncommon PHARB | |||
| Juncus canadensis Gay ex LaHarpe [Juncus canadensis var. sparsiflorus Fern.] Marsh or Canadian Rush | Native Abundant PHARB | |||
| Juncus dichotomus Ell. [Juncus platyphyllus (Wieg.) Fern.] Forked Rush | Native Uncommon PHARB | |||
| Juncus diffusissimus Buckley Slim-fruited Rush County Record (GP #20-201) | Introduced Rare PHARB | |||
| Juncus effusus ssp. solutus (Fern. & Wieg.) Hämet-Ahti [Juncus effusus var. pylaei (Laharpe) Fern. & Wieg.] Soft or Common Rush | Native Common PHARB | |||
| Juncus gerardii Loisel. Saltmarsh Rush, Black Grass | Native Common PHARB | |||
| Juncus greenei Oakes & Tuckerman Greene's Rush | Native Common PHARB | |||
| Juncus marginatus Rostk. Grass-leaf Rush | Native Uncommon PHARB | |||
| Juncus militaris Bigelow Bayonet Rush | Native Historic CNH | |||
| Juncus pelocarpus E. Meyer Pondshore Rush | Native Uncommon PHARB | |||
| Juncus pylaei Laharpe [Juncus effusus var. solutus Fern. & Wieg.] Soft or Common Rush | Native Common PHARB | |||
| Juncus subcaudatus (Engelm.) Cov. & Blake Semitailed Rush | Native Historic CNH | |||
| Juncus tenuis Willd. [Juncus tenuis var. williamsii Fern.] Path Rush, Yard Rush | Native Abundant PHARB | |||
| Luzlua campestris (L.) DC. [Juncoides campestre (L.) Kuntze] Northern Wood-rush County Record (GP #16-20) | Introduced Rare PHARB | |||
| Luzula bulbosa (Wood) Rydb. Bulbous Wood-rush | Native, Watch List Common PHARB | |||
| Luzula multiflora ssp. multiflora (Retz.) Lej. Common Wood-rush | Native Historic CNH | |||
Cyperaceae | ||||
| Bolboschoenus maritimus ssp. maritimus (L.) Palla Coastal Cosmopolitan Bulrush | Introduced Rare PHARB | |||
| Bolboschoenus maritimus ssp. paludosus (A. Nels.) T. Koyama [Scirpus maritimus L.] Seaside Bulrush | Native Uncommon PHARB | |||
| Bolboschoenus novae-angliae (Britt.) S.G. Smith [Scirpus cylindricus (Torrey) Britton] Long-spiked Bulrush | Native, Watch List Historic CNH | |||
| Bolboschoenus robustus (Pursh) Soják [Scirpus robustus Pursh] Saltmarsh Bulrush | Native Uncommon PHARB | |||
| Bulbostylis capillaris (L.) Kunth ex C.B. Clarke Sand Sedge | Native Uncommon PHARB | |||
| Carex ×olneyi Boott [Carex bullata × C. lurida] Olney's Sedge | Native Unknown | |||
| Carex abscondita Mackenzie Concealed Sedge | Native, Watch List Occasional PHARB | |||
| Carex alata Torrey Winged Sedge | Native Historic CNH | |||
| Carex albicans var. emmonsii (Dewey ex Torrey) J. Rettig [Carex emmonsii Dewey ex Torrey] Emmon's Sedge | Native Common PHARB | |||
| Carex albolutescens Schwein. Greenish-white Sedge | Native Common PHARB | |||
| Carex annectens (Bicknell) Bicknell Yellow or Yellow-fruited Fox Sedge | Native Common PHARB | |||
| Carex appalachica Webber & Ball [Carex radiata auct. non (Wahlenb.) Small] Appalachian Sedge | Native Unknown | |||
| Carex atlantica ssp. atlantica Bailey [Carex incomperta Bicknell] Atlantic Prickly Sedge | Native Common PHARB | |||
| Carex atlantica ssp. capillacea (Bailey) Reznicek [Carex howei Mackenzie] Threadstem or Howe's Prickly Sedge | Native Common PHARB | |||
| Carex bebbii Olney ex Fern. Bebb's Broom Sedge | Native Historic CNH | |||
| Carex blanda Dewey Woodland Sedge Previously historic, re-established in 2016 (GP #16-63) | Native Occasional PHARB | |||
| Carex brevior (Dewey) Mack. ex Lunell Short Fescue Sedge Previously historic, re-established in 2016 (GP #16-74) | Native Rare PHARB | |||
| Carex brunnescens var. sphaerostachya (Tuckerman) Kukenth. Brownish Sedge Only known county occurrence is from the Elizabeth Islands | Native Historic CNH | |||
| Carex bullata Schkuhr ex Willd. Button Sedge | Native Historic PHARB | |||
| Carex canescens ssp. disjuncta (Fern.) Toivonen [Carex canescens var. disjuncta Fern.] Silvery Bog Sedge | Native Occasional PHARB | |||
| Carex cephalophora Muhl. ex Willd. Oval-headed Sedge | Native Occasional PHARB | |||
| Carex communis var. communis Bailey Colonial Sedge | Native Occasional PHARB | |||
| Carex comosa Boott Bristly Sedge | Native Uncommon PHARB | |||
| Carex crinita var. brevicrinis Fern. Fringed Sedge | Native Rare PHARB | |||
| Carex crinita var. crinita Lam. Awned or Fringed Sedge | Native Rare PHARB | |||
| Carex cumulata (Bailey) Mackenzie Crowded Sedge | Native Unknown | |||
| Carex debilis var. debilis Michaux Southern Stalked Sedge | Native, Watch List Occasional PHARB | |||
| Carex debilis var. rudgei Bailey Northern Stalked Sedge | Native Historic | |||
| Carex digitalis var. digitalis Willd. Slender-spiked Woodland Sedge | Native Uncommon PHARB | |||
| Carex disticha Huds. Two-rank Sedge County Record (MDC #12001) | Introduced Rare PHARB | |||
| Carex echinata Murray [Carex angustior Mackenzie] Prickly Sedge | Native Occasional PHARB | |||
| Carex festucacea Schkuhr ex Willd. Fescue Sedge | Native Rare PHARB | |||
| Carex hormathodes Fern. Saltmarsh Straw Sedge | Native Occasional PHARB | |||
| Carex intumescens Rudge Bladder or Swamp Sedge | Native Common PHARB | |||
| Carex laevivaginata (Kukenth.) Mackenzie Smooth-sheathed Sedge | Native Occasional PHARB | |||
| Carex leptalea ssp. leptalea Wahlenb. Delicate or Bristle-stalked Sedge | Native Historic CNH | |||
| Carex limosa L. Mud Sedge Only known county occurrence is from the Elizabeth Islands | Native, Watch List Historic PHARB | |||
| Carex longii Mackenzie Long's Sedge | Native Common PHARB | |||
| Carex lucorum var. lucorum Willd. ex Link [Carex pensylvanica var. distans Peck] Long-beaked Pennsylvania Sedge | Native Occasional PHARB | |||
| Carex lupulina Muhl. ex Willd. Hop Sedge | Native Uncommon PHARB | |||
| Carex lurida Wahlenb. Sallow Sedge | Native Common PHARB | |||
| Carex mitchelliana M.A. Curtis Mitchell's Awned Sedge Previously historic, re-established in 2020 (GP #20-178) | Native, Threatened Occasional PHARB | |||
| Carex muehlenbergii var. muehlenbergii Schkuhr ex Willd. Muhlenberg's Sedge | Native Occasional PHARB | |||
| Carex nigra (L.) Reichard Smooth Black Sedge | Native Rare PHARB | |||
| Carex normalis Mackenzie Greater Straw Sedge County Record (GP #16-67) | Native Rare PHARB | |||
| Carex pallescens L. [Carex pallescens var. neogaea Fern.] Pale or Shiny Green Sedge | Native Uncommon PHARB | |||
| Carex pellita Muhl. [Carex lanuginosa Michaux] Broad Woolly-fruited Sedge | Native Historic CNH | |||
| Carex pensylvanica Lam. Pennsylvania Sedge | Native Abundant PHARB | |||
| Carex radiata (Wahlenb.) Small Eastern Star Sedge Only known county occurrence is from the Elizabeth Islands | Native Historic CNH | |||
| Carex rosea Schkuhr ex Willd. [Carex convoluta Mackenzie] Big Star Sedge | Native Occasional PHARB | |||
| Carex scoparia var. scoparia Schkuhr ex Willd. Broom Sedge | Native Common PHARB | |||
| Carex seorsa Howe Swamp Prickly Sedge Previously historic, re-established in 2016 (GP #16-48) | Native Occasional PHARB | |||
| Carex silicea Olney Seabeach Sedge | Native Occasional PHARB | |||
| Carex spicata Huds. [Carex contigua Hoppe] European Star Sedge | Introduced Uncommon PHARB | |||
| Carex stipata var. stipata Muhl. ex Willd. Awl-fruited or Wrinkle-sheathed Sedge | Native Rare PHARB | |||
| Carex straminea Willd. ex Schkuhr Straw Sedge Only known county occurrence is from the Elizabeth Islands | Native Historic CNH | |||
| Carex stricta Lam. Tussock Sedge | Native Occasional PHARB | |||
| Carex swanii (Fern.) Mackenzie Swan's Sedge | Native Abundant PHARB | |||
| Carex tenera Dewey Delicate Quill Sedge County Record (GP #16-66) | Native Rare PHARB | |||
| Carex tonsa var. rugosperma (Mackenzie) W.J. Crins [Carex rugosperma Mackenzie] Sand Sedge | Native Rare PHARB | |||
| Carex tonsa (Fern.) Bickn. [Carex rugosperma var. rugosperma Mackenzie] Shaved Sedge County Record (GP #17-12) | Native Occasional PHARB | |||
| Carex umbellata Schkuhr ex Willd. [Carex abdita Bicknell] Short-beaked Sand Sedge, Parasol Sedge | Native Historic CNH | |||
| Carex utriculata Boott [Carex rostrata var. utriculata (Boott) Bailey] Beaked or Bottle Sedge | Native Unknown | |||
| Carex virescens Muhl. ex Willd. Ribbed Sedge | Native Historic PHARB | |||
| Carex viridula ssp. viridula Michaux Little Green Sedge | Native, Watch List Historic CNH | |||
| Carex vulpinoidea Michaux [Carex setacea Dewey] Fox Sedge | Native Common PHARB | |||
| Cladium mariscoides (Muhl.) Torrey Twig Sedge, Twig Rush | Native Occasional PHARB | |||
| Cyperus bipartitus Torrey [Cyperus rivularis Kunth] Shining or Red-scaled Flatsedge | Native Rare PHARB | |||
| Cyperus brevifolioides Thieret & Delahouss. Pasture Greenhead-sedge | Introduced Rare PHARB | |||
| Cyperus compressus L. Annual Sedge County and State Record (GP #16-168) | Introduced Rare PHARB | |||
| Cyperus dentatus Torrey Pondshore or Toothed Flatsedge | Native Uncommon PHARB | |||
| Cyperus diandrus Torrey Strand or Red-edged Flatsedge | Native Occasional PHARB | |||
| Cyperus esculentus var. leptostachyus Boeck. Yellow or Tuberous Flatsedge | Native Common PHARB | |||
| Cyperus filicinus Vahl [Cyperus polystachyos var. filicinus (Vahl) C.B. Clarke] Saltpond or Seaside Flatsedge | Native Common PHARB | |||
| Cyperus flavescens Yellow Flatsedge | Introduced Rare PHARB | |||
| Cyperus grayi Torrey Dune or Gray's Flatsedge Previously historic, re-established in 2013 (TB, EH) | Native Occasional PHARB | |||
| Cyperus iria L. Rice-field Flat Sedge County Record (GP #16-166) | Introduced Rare PHARB | |||
| Cyperus lupulinus ssp. macilentus (Fern.) Marcks [Cyperus filiculmis var. macilentus Fern.] Sand or Button Flatsedge | Native Occasional PHARB | |||
| Cyperus microiria Steud. Lesser rice-field sedge County Record (GP #16-174) | Introduced Rare PHARB | |||
| Cyperus odoratus L. [Cyperus ferruginescens Boeckl.] Saltmarsh Flatsedge | Native, Watch List Rare PHARB | |||
| Cyperus retrorsus Chapman Pine Barren Flatsedge | Native, Watch List Rare PHARB | |||
| Cyperus squarrosus L. Awned Flatsedge County Record (GP #16-167) | Native Rare PHARB | |||
| Cyperus strigosus L. [Cyperus strigosus var. robustior Britton] Straw-colored Flatsedge | Native Common PHARB | |||
| Dulichium arundinaceum var. arundinaceum (L.) Britton Threeway Sedge | Native Occasional PHARB | |||
| Eleocharis acicularis (L.) R. & S. Needle Spike-rush | Native Occasional PHARB | |||
| Eleocharis ambigens Fern. Ambiguous Spike-rush Only known county occurrence is from the Elizabeth Islands | Native Historic CNH | |||
| Eleocharis elliptica var. elliptica Kunth Orange-fruited Spike-rush | Native Historic CNH | |||
| Eleocharis flavescens var. olivacea (Torr.) Gleason [Eleocharis olivacea Torrey] Olive Spike-rush | Native Rare PHARB | |||
| Eleocharis obtusa var. obtusa (Willd.) J.A. Schultes Soft-stemmed Spike-rush | Native Common PHARB | |||
| Eleocharis palustris (L.) Roemer & Schultes [Eleocharis palustris var. major (L.) Roemer & Schultes] Small's Spike-rush, Marsh Spike-rush | Native Occasional PHARB | |||
| Eleocharis parvula (R. & S.) Link ex Bluff, Nees & Schauer Saltpong or Dwarf Spike- rush | Native Uncommon PHARB | |||
| Eleocharis rostellata (Torrey) Torrey Beaked Spike-rush | Native, Watch List Rare PHARB | |||
| Eleocharis tenuis var. tenuis (Willd.) J.A. Schultes Slender Spike-rush Previously historic, re-established in 2012 (KF, TB) | Native Occasional PHARB | |||
| Eleocharis uniglumis (Link) Schultes [Eleocharis halophila (Fern. & Brack.) Fern. & Brack] Saline Spike-rush | Native Historic CNH | |||
| Eriophorum tenellum Nutt. Rough or Conifer Cottongrass | Native Historic CNH | |||
| Eriophorum virginicum L. Tawny or Virginia Cottongrass | Native Rare PHARB | |||
| Fimbristylis autumnalis (L.) Roemer & Schultes Autumn or Northern Fimbry | Native Occasional PHARB | |||
| Kyllinga gracillima Miq. Pasture Greenhead-sedge County Record (GP #18-164) | Introduced Rare PHARB | |||
| Lipocarpha micrantha (Vahl) G. Tucker [Hemicarpha micrantha (Vahl) Pax ex Engler & Prantl] Lakeshore Hemicarpha | Native, Threatened Rare PHARB | |||
| Rhynchospora alba (L.) Vahl White Beak-rush | Native Rare PHARB | |||
| Rhynchospora capitellata (Michaux) Vahl Brown Beak-rush | Native Common PHARB | |||
| Rhynchospora fusca (L.) Aiton f. Sooty Beak-rush | Native Historic CNH | |||
| Schoenoplectus acutus (Muhl. Ex Bigelow) A. & D. Love [Scirpus acutus Muhl. Ex Bigelow] Hard-stemmed Bulrush County Record (MDC #2240) | Native, Watch List Rare PHARB | |||
| Schoenoplectus americanus (Pers.) Volk. ex Schinz & R. Keller [Scirpus americanus Pers.] Saltmarsh Bulrush | Native Uncommon PHARB | |||
| Schoenoplectus pungens (Vahl) Palla [Scirpus pungens var. pungens (Vahl) Palla] Chairmaker's Bulrush | Native Common PHARB | |||
| Schoenoplectus purshianus var. purshianus (Fern.) M.T. Strong [Scirpus purshianus var. purshianus (Fern.) M.T. Strong] Pursh's Bulrush Previously historic, re-established in 2015 (GP #15-44) | Native Rare PHARB | |||
| Schoenoplectus subterminalis (Torr.) Sojak [Scirpus subterminalis Torr.] Water Bulrush County record (TB, MDC #1929) | Native Rare PHARB | |||
| Schoenoplectus tabernaemontani (K.C. Gmel.) Palla [Scirpus tabernaemontani K. C. Gmelin] Soft-stemmed Bulrush | Native Common PHARB | |||
| Scirpus cyperinus (L.) Kunth [Scirpus rubricosus Fern.] Wool-grass, Common Bulrush | Native Common PHARB | |||
| Scirpus hattorianus Makino Mosquito Bulrush County Record (GP #19-262) | Native Rare PHARB | |||
| Scleria pauciflora var. caroliniana (Willd.) Wood Papillose Nut-sedge | Native, Endangered Uncommon PHARB | |||
| Scleria pauciflora var. pauciflora Muhl. ex Willd. Papillose Nut-sedge | Native, Endangered Uncommon PHARB | |||
| Scleria reticularis Michaux Pondshore or Reticulate Nut-sedge | Native, Watch List Historic CNH | |||
Poaceae | ||||
| Agrostis capillaris L. [Agrostis tenuis Sibth.] Rhode Island Bentgrass | Introduced Common PHARB | |||
| Agrostis gigantea Roth [Agrostis alba auct. non L.] Redtop, Black Bentgrass | Introduced Abundant PHARB | |||
| Agrostis hyemalis (Walt.) B.S.P. Southern Ticklegrass | Native Uncommon PHARB | |||
| Agrostis perennans (Walt.) Tuckerman [Agrostis altissima (Walter) Tuckerman] Upland Bentgrass | Native Occasional PHARB | |||
| Agrostis scabra Willd. Northern Ticklegrass | Native Common PHARB | |||
| Agrostis stolonifera L. [Agrostis stolonifera var. palustris (Hudson) Farw.] Creeping Bentgrass | Introduced Common PHARB | |||
| Aira caryophyllea var. caryophyllea L. Silvery Hairgrass | Introduced Common PHARB | |||
| Aira praecox L. Strict Hairgrass | Introduced Abundant PHARB | |||
| Ammophila breviligulata ssp. breviligulata Fern. Dunegrass | Native Abundant PHARB | |||
| Andropogon gerardii Vitman Big Bluestem, Turkeyfoot | Native Unknown PHARB | |||
| Andropogon glomeratus var. glomeratus (Walter) B.S.P. [Andropogon virginicus var. abbreviatus (Hackel) Fern. &] Bunched Broom-sedge | Native Common PHARB | |||
| Andropogon virginicus var. virginicus L. Broom-sedge | Native Common PHARB | |||
| Anthoxanthum nitens ssp. nitens (Weber) Y. Schouten & Veldkamp [Hierochloe odorata (L.) Beauv.] Sweet or Indian Grass | Native Historic CNH | |||
| Anthoxanthum odoratum L. Sweet Vernalgrass | Introduced Abundant PHARB | |||
| Anthoxanthum ovatum var. aristatum Pérez-Lara [Anthoxanthum aristatum Boiss.] Puel's Vernalgrass | Introduced Historic CNH | |||
| Apera spica-venti (L.) Beauv. Silky Bentgrass | Introduced Unknown | |||
| Aristida dichotoma var. dichotoma Michaux Poverty Grass | Native Occasional PHARB | |||
| Aristida longespica var. geniculata (Raf.) Fern. Slender Needle-grass County record (GP #19-288) | Native Rare PHARB | |||
| Aristida purpurascens Poiret Purple Needle-grass | Native, Threatened Rare PHARB | |||
| Arrhenatherum elatius (L.) J. & K. Presl Tall Oat Grass | Introduced Rare PHARB | |||
| Avena fatua L. Common Wild Oat County Record (GP #21-142) | Introduced PHARB | |||
| Avena sativa L. Wild Oats Previously historic, re-established in 2017 (GP #17-77) | Introduced Waif PHARB | |||
| Bromus commutatus Schrader Hairy Chess | Introduced Historic | |||
| Bromus hordeaceus ssp. hordeaceus L. [Bromus mollis auct. non L.] Soft Chess | Introduced Occasional PHARB | |||
| Bromus hordeaceus ssp. thominei (Hardouin) Hylander [Bromus thominii Hardouin] Soft Chess | Introduced Historic CNH | |||
| Bromus inermis Leyss. Smooth Brome County Record (GP #17-45) | Introduced Common PHARB | |||
| Bromus japonicus Thunb. ex Murr. Japanese Brome County Record (GP #17-57) | Introduced Rare PHARB | |||
| Bromus secalinus L. Rye Brome | Introduced Historic CNH | |||
| Bromus tectorum L. Drooping Brome | Introduced Common PHARB | |||
| Calamagrostis canadensis var. canadensis (Michaux) Beauv. Canada Bluejoint, Reedgrass | Native Common PHARB | |||
| Calamagrostis cinnoides (Muhl.) Bart. [Calamagrostis coarctata (Torrey) Eaton] Reed Bluejoint | Native Rare PHARB | |||
| Calamagrostis epigejos (L.) Roth Feathertop Reed Grass County Record (GP #16-135) | Introduced Occasional PHARB | |||
| Calamagrostis stricta (Timm) Koel. Neglected Reed Grass County Record (GP #16-177) | Native Waif PHARB | |||
| Cenchrus alopecuroides (L.) Thunb. Fountain Grass County Record (GP #17-159) | Introduced Uncommon PHARB | |||
| Cenchrus longispinus (Hackel) Fern. Common or Field Sandbur, Sandspur | Native Historic CNH | |||
| Chloris verticillata Nutt. Windmill-grass Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Cinna arundinacea L. Common, Stout, or Broad Woodreed | Native Rare PHARB | |||
| Coleataenia longifolia ssp. longifolia (Torr.) Soreng [Panicum longifolium Torr.] Long-leaved Panic- grass Only known county occurrence is from the Elizabeth Islands | Native, Threatened Rare | |||
| Coleataenia rigidula ssp. rigidula (Bosc ex Nees) [Panicum rigidulum var. rigidulum Bosc ex Nees] Flat-stemmed Panic-grass Previously historic, re-established in 2020 (GP #20-219) | Native Rare PHARB | |||
| Corynephorus canescens (L.) Beauv. Clubgrass, Gray Hairgrass | Introduced Historic CNH | |||
| Dactylis glomerata L. Orchard Grass | Introduced Abundant PHARB | |||
| Danthonia compressa Austin ex Peck Flattened Oatgrass County Record (GP #16-98) | Native Occasional PHARB | |||
| Danthonia spicata (L.) Beauv. ex Roemer & J.A. Schultes Poverty-grass, Wild Oatgrass | Native Common PHARB | |||
| Deschampsia flexuosa (L.) Trin. Common Hairgrass | Native Common PHARB | |||
| Dichanthelium acuminatum ssp. acuminatum (Sw.) Gould & Clark [Panicum auburne Ashe] Auburn Panic-grass | Native, Watch List Common | |||
| Dichanthelium acuminatum ssp. columbianum (Scribn.) Freckmann & Lelong [Dichanthelium columbianum (Scribner) Freckmann] Downy Panic-grass | Native Common PHARB | |||
| Dichanthelium acuminatum ssp. lindheimeri (Nash) Freckmann & Lelong [Dichanthelium acuminatum var. lindheimeri Gould & Clark] Lindheimer's Panic-grass | Native Historic CNH | |||
| Dichanthelium clandestinum (L.) Gould [Panicum clandestinum] Deer-tongue, Riverside Panic-grass | Native Common PHARB | |||
| Dichanthelium columbianum (Scribn.) Freckmann Panic-grass | Native Common PHARB | |||
| Dichanthelium commutatum ssp. ashei (G. Pearson ex Ashe) Freckmann & Lelong [Panicum commutatum J.A. Schultes] Changeable Panic-grass Only known county occurrence is from the Elizabeth Islands | Native Historic | |||
| Dichanthelium depauperatum (Muhl.) Gould [Panicum depauperatum Muhl.] Depauperate Panic-grass | Native Occasional PHARB | |||
| Dichanthelium dichotomum ssp. dichotomum (L.) Gould [Panicum dichotomum L.] Forked Panic-grass | Native Occasional PHARB | |||
| Dichanthelium dichotomum ssp. mattamuskeetense (Ashe) Freckmann & Lelong [Dichanthelium mattamuskeetense (Ashe) Mohlenbrock] Mattamuskeet Panic-grass | Native, Endangered Historic CNH | |||
| Dichanthelium dichotomum ssp. microcarpon (Muhl. ex Ell.) Freckmann & Lelong [Dichanthelium microcarpon (Muhl. ex Ell.) Mohlenbrock] Tiny-fruited Panic-grass | Native Occasional PHARB | |||
| Dichanthelium huachucae (Ashe) G.Wilh. & Rericha Hairy Rosette Grass | Native Occasional PHARB | |||
| Dichanthelium implicatum (Scribn.) Kerguélen Panic Grass | Native Uncommon PHARB | |||
| Dichanthelium meridionale (Ashe) Freckmann Matting Rosette Grass | Native Common PHARB | |||
| Dichanthelium oligosanthes ssp. scribnerianum (Nash) Freckmann & Lelong [Dichanthelium oligosanthes var. scribnerianum (Nash)] Scribner's Panic-grass | Native Occasional PHARB | |||
| Dichanthelium ovale ssp. pseudopubescens (Nash) Freckmann & Lelong [Dichanthelium commonsianum (Ashe) Freckmann] Commons' Panic-grass Only known county occurrence is from the Elizabeth Islands | Native Historic CNH | |||
| Dichanthelium ovale ssp. villosissimum (Nash) Freckmann & Lelong [Dichanthelium villosissimum (Nash) Freckmann] Villous Panic-grass | Native Historic CNH | |||
| Dichanthelium scoparium (Lam.) Gould [Panicum scoparium Lam.] Broom Panic-grass Previously historic, re-established in 2019 | Native Rare PHARB | |||
| Dichanthelium sphaerocarpon (Ell.) Gould Round-fruited Panic-grass | Native Occasional PHARB | |||
| Dichanthelium spretum (Schult.) Freckmann Eaton's Rosette Grass County Record (GP #21-45) | Native PHARB | |||
| Dichanthelium linearifolium (Scribn.) Gould Linear-leaved Rosette Panic-grass | Native Historic | |||
| Digitaria cognata (J. A Schultes) Pilger [Leptoloma cognatum (J.A.Schultes) Chase] Fall Witchgrass | Native, Watch List Rare PHARB | |||
| Digitaria filiformis var. filiformis (L.) Koeler Slender Crabgrass | Native Historic CNH | |||
| Digitaria ischaemum (Schreber) Muhl. Smooth Crabgrass | Introduced Common PHARB | |||
| Digitaria sanguinalis (L.) Scop. Tall or Large Crabgrass | Introduced Historic CNH | |||
| Distichlis spicata (L.) Greene Saltmarsh Spikegrass, Alkali-grass, Saltgrass | Native Common PHARB | |||
| Echinochloa crus-galli (L.) Beauv. Barnyard Grass | Introduced Common PHARB | |||
| Echinochloa frumentacea Link [Echinochloa crus-galli var. frumentacea (Link) W.] Japanese Millet | Introduced Historic CNH | |||
| Echinochloa muricata var. microstachya Wiegand Cockspur-grass, Barnyard Grass | Native Rare PHARB | |||
| Echinochloa muricata var. muricata (Beauv.) Fern. Cockspur-grass, Barnyard Grass Previously historic, re-established in 2018 (GP #18-118) | Native Rare PHARB | |||
| Echinochloa walterii (Pursh) Heller Walter's Cockspur, Water Millet | Native Occasional PHARB | |||
| Eleusine indica (L.) Gaertn. Indian Goosegrass County Record (EL 2012) | Introduced Occasional PHARB | |||
| Elymus glabriflorus var. australis (Scribn. & Ball) J.J.N. Campb. Southeastern Wild Rye | Native Historic CNH | |||
| Elymus repens (L.) Gould [Elytrigia repens (L.) Desv. ex B.D. Jackson] Quack-grass, Couch-grass | Native Common PHARB | |||
| Elymus virginicus var. halophilus (Bickn.) Wieg. Saltmarsh Wild Rye | Native Rare PHARB | |||
| Elymus virginicus var. virginicus L. Virginia Wild Rye | Native Rare PHARB | |||
| Eragrostis capillaris (L.) Nees Lace Lovegrass County Record (GP #20-146) | Native Rare PHARB | |||
| Eragrostis cilianensis (All.) Lut. ex Janchen [Eragrostis megastachya (Koeler) Link] Stink Grass, Skunk Grass | Introduced Uncommon PHARB | |||
| Eragrostis curvula (Schrad.) Nees Weeping Lovegrass County Record (GP #16-176) | Introduced Rare PHARB | |||
| Eragrostis pectinacea var. pectinacea (Michaux) Nees Tufted or Carolina Lovegrass | Native Uncommon PHARB | |||
| Eragrostis pilosa (L.) Beauv. India Lovegrass County Record (GP #16-159) | Introduced Uncommon PHARB | |||
| Eragrostis spectabilis (Pursh) Steudel [Eragrostis spectabilis var. sparsihirsuta Farw.] Purple Lovegrass, Tumble-grass | Native Common PHARB | |||
| Festuca filiformis Pourret [Festuca capillata Lam.] Hair Fescue | Introduced Common PHARB | |||
| Festuca ovina L. Sheep Fescue | Introduced Historic PHARB | |||
| Festuca rubra L. Chewing's Fescue | Native Common PHARB | |||
| Festuca subverticillata (Pers.) Alexeev [Festuca obtusa Biehler] Nodding Fescue | Native Uncommon PHARB | |||
| Festuca trachyphylla (Hackel) Krajina [Festuca duriuscula L. sensu auct. amer.] Hard Fescue | Introduced Unknown | |||
| Glyceria acutiflora Torrey Sharp-scaled Mannagrass | Native Historic PHARB | |||
| Glyceria canadensis (Michaux) Trin. Rattlesnake Grass, Mannagrass | Native Occasional PHARB | |||
| Glyceria obtusa (Muhl.) Trin. Coastal Mannagrass | Native Occasional PHARB | |||
| Glyceria striata (Lam.) A.S. Hitchc. [Glyceria striata var. stricta (Scribner)] Fowl Meadow-grass, Fowl Mannagrass | Native Occasional PHARB | |||
| Holcus lanatus L. Velvet-grass | Introduced Abundant PHARB | |||
| Hordeum jubatum ssp. jubatum L. Foxtail-barley, Squirrel-tail | Native Historic CNH | |||
| Leersia oryzoides (L.) Sw. Rice Cut-grass | Native Common PHARB | |||
| Leptochloa fusca ssp. fascicularis (Lam.) N. Snow [Diplachne maritima Bicknell] Saltpond Grass, Salty Sprangletop | Native, Threatened Rare CNH | |||
| Leymus mollis ssp. mollis (Trin.) Hara [Elymus arenarius var. villosus Meyer] Sea Lyme-grass, American Dunegrass | Native, Endangered Historic CNH | |||
| Lolium multiflorum Lam. [Lolium perenne var. aristatum Willd.] Italian Rye-grass | Introduced Unknown | |||
| Lolium perenne L. Perennial or English Rye-grass | Introduced Common PHARB | |||
| Microstegium vimineum (Trin.) A. Camus Japanese Stilt Grass County Record (EL,TB 2009) | Introduced, Invasive Common PHARB | |||
| Miscanthus sinensis Anderss. Chinese Silvergrass County Record (GP #16-144) | Introduced Occasional PHARB | |||
| Muhlenbergia frondosa (Poiret) Fern. Wirestem or Leafy Muhly | Native Historic CNH | |||
| Muhlenbergia schreberi J.F. Gmelin Nimblewill Previously historic, re-established in 2011 (EL) | Native Common PHARB | |||
| Panicum capillare L. [Panicum capillare var. occidentale Rydb.] Witch Grass Previously historic, re-established in 2020 (GP #20-239) | Native Rare PHARB | |||
| Panicum dichotomiflorum var. dichotomiflorum Michaux [Panicum dichotomiflorum var. geniculatum (Wood) Fern.] Fall Panic-grass | Native Common PHARB | |||
| Panicum dichotomiflorum var. puritanorum Svenson Svenson's Panic-grass | Native PHARB | |||
| Panicum miliaceum L. Proso Millet County Record (GP #20-144) | Introduced PHARB | |||
| Panicum philadelphicum var. campestre (Gatt.) A. Haines [Panicum philadelphicum ssp. gattingeri (Nash)] Gattinger's Panic-grass County Record (GP #16-163) | Native PHARB | |||
| Panicum philadelphicum var. philadelphicum Bernh. ex Trin. Philadelphia Panic-grass County Record (GP #19-213) | Native, Special Concern PHARB | |||
| Panicum verrucosum Muhl. Warty Panic-grass Previously historic, re-established in 2019 (GP #19-200) | Native Rare PHARB | |||
| Panicum virgatum L. [Panicum virgatum var. cubense Griseb.] Saltmarsh Switchgrass | Native Abundant PHARB | |||
| Paspalum laeve Michaux [Paspalum laeve var. circulare (Nash) W. Stone Fern.] Field or Meadow Beadgrass | Native Historic CNH | |||
| Paspalum setaceum var. muhlenbergii (Nash) D. Banks [Paspalum ciliatifolium var. muhlenbergii (Nash) Fern.] Muhlenberg's Beadgrass | Native Uncommon PHARB | |||
| Paspalum setaceum var. psammophilum (Nash) D. Banks [Paspalum psammophilum] Sand Beadgrass | Native, Watch List Uncommon PHARB | |||
| Paspalum setaceum var. setaceum Michaux Small-fruited or Slender Beadgrass | Native, Watch List Uncommon PHARB | |||
| Phalaris arundincaea L. Reed Canary Grass | Introduced, Invasive Occasional PHARB | |||
| Phleum pratense L. [Phleum pratense ssp. nodosum (L.) Arcang.] Timothy | Introduced Common PHARB | |||
| Phragmites americanus (Saltonst., P.M. Peterson, & Soreng) A. Haines American Reed County Record (EL 2018) | Native, Watch List Rare LAST RECORD 2018 | |||
| Phragmites australis var. australis (Cav.) Trin. ex Steudel Phragmites, Common Reed | Introduced, Invasive Common PHARB | |||
| Piptochaetium avenaceum (L.) Parodi [Stipa avenacea L.] Black Oatgrass | Native, Watch List Rare PHARB | |||
| Poa annua L. Annual Bluegrass, Low Speargrass | Introduced Common PHARB | |||
| Poa bulbosa L. Bulbous Blue Grass County Record (GP #17-05) | Introduced Rare PHARB | |||
| Poa compressa L. Canada or Flat-stemmed Bluegrass | Introduced Occasional PHARB | |||
| Poa palustris L. Fowl Meadow Grass | Introduced Historic CNH | |||
| Poa pratensis ssp. angustifolia (L.) Arcang. [Poa angustifolia L.] Narrow-leaved Kentucky Bluegrass | Introduced Uncommon PHARB | |||
| Poa pratensis ssp. pratensis L. Junegrass, Kentucky Bluegrass | Introduced Common PHARB | |||
| Poa trivialis ssp. trivialis L. Rough Bluegrass Previously historic, re-established in 2018 (GP #18-11) | Introduced Occasional PHARB | |||
| Puccinellia pumila (Vasey) A.S. Hitchc. [Glyceria paupercula (Holmb.)] Northern Alkali Grass | Native Historic CNH | |||
| Schedonorus arundinaceus (Schreb.) Dumort. [Festuca arundinacea Vill.] Tall Fescue County Record (GP #17-163) | Introduced Uncommon PHARB | |||
| Schedonorus pratensis (Huds.) Beauv. [Festuca pratensis Hudson] Meadow Fescue | Introduced Historic CNH | |||
| Schedonorus pratensis (Huds.) Beauv. Meadow Rye Grass | Introduced Uncommon CNH | |||
| Schizachyrium scoparium var. scoparium (Michaux) Nash [Andropogon scoparium Michaux] Little Bluestem, Broom or Prairie Beardgrass | Native abundant PHARB | |||
| Secale cereale L. Cultivated Rye County Record (GP #16-85) | Introduced Rare PHARB | |||
| Setaria faberi Herrm. ex Rosen Foxtail Grass, Nodding or Giant Foxtail | Introduced Occasional PHARB | |||
| Setaria italica [Panicum verticillatum L.] Millet Foxtail County Record (GP #16-178) | Introduced Rare PHARB | |||
| Setaria parviflora (Poiret) Kerguelen [Setaria geniculata (Lam.) Beauv.] Bristly or Saltmarsh Foxtail | Native, Special Concern Occasional PHARB | |||
| Setaria pumila ssp. pumila (Poir.) Roemer & J.A. Schultes [Panicum pumilum Poir.] Yellow Foxtail | Introduced Common PHARB | |||
| Setaria viridis var. viridis (L.) Beauv. [Setaria viridis var. weinmannii (Roemer & Schultes) Brand] Green Foxtail, Bottle Grass Previously historic, re-established in 2012 (EL) | Introduced Rare PHARB | |||
| Sorghastrum nutans (L.) Nash Indian Grass | Native Uncommon PHARB | |||
| Spartina ×caespitosa A.A. Eaton [Spartina patens var. monogyna (M.A. Curtis)] Short Cordgrass | Native Historic CNH | |||
| Spartina alterniflora Loisel Smooth or Saltwater Cordgrass | Native Common PHARB | |||
| Spartina cynosuroides (L.) Roth Salt Reedgrass | Native, Threatened Historic | |||
| Spartina patens (Aiton) Muhl. [Spartina patens × S. pectinata] Salt-hay, Salt-meadow Grass, Cordgrass | Native Common PHARB | |||
| Spartina pectinata Link [Spartina pectinata var. suttiei (Farw.) Fern.] Freshwater or Prairie Cordgrass, Slough-grass | Native Common PHARB | |||
| Sporobolus vaginiflorus var. vaginiflorus (Torrey ex A. Gray) Wood Poverty Grass | Native Historic CNH | |||
| Thinopyrum intermedium (Host) Barkworth & D.R.Dewey [Elytrigia intermedia Nevski.] Intermediate Wheatgrass County Record (GP #17-155) | Introduced Rare PHARB | |||
| Thinopyrum pycnanthum (Godr.) Barkworth Tick Quack Grass | Introduced Uncommon PHARB | |||
| Torreyochloa pallida var. pallida (Torrey) Church [Glyceria pallida (Torr.) Trin.] Pale or Torrey's Mannagrass | Native Rare PHARB | |||
| Tridens flavus var. flavus (L.) A.S. Hitchc. [Triodia flava (L.) Smyth] Purpletop, Tall Retop | Introduced Occasional PHARB | |||
| Triplasis purpurea var. purpurea (Walter) Chapman Gama-grass, Sesame Grass | Native Historic PHARB | |||
| Tripsacum dactyloides (L.) L. Gama-grass | Native, Endangered Rare | |||
| Vulpia myuros (L.) K.C. Gmelin [Vulpia myuros var. hirsuta Hackel] Mousetail or Rattail Fescue | Introduced Common PHARB | |||
| Vulpia octoflora var. octoflora (Walt.) Rydb. Eight-flowered Six-weeks Grass County record (GP #18-43) | Native Uncommon PHARB | |||
| Vulpia octoflora var. tenella (Willd.) Fern. [Festuca octoflora var. glauca (Nutt.) Fern.] Six-weeks Fescue | Native Historic CNH | |||
| Zizania palustris var. palustris L. [Zizania aquatica var. angustifolia A.S. Hitchc.] Slender Wild Rice | Native, Watch List Historic CNH | |||
| Zoysia japonica Steud. Zoysia Grass | Introduced Uncommon PHARB | |||
Commelinaceae | ||||
| Commelina communis L. Dayflower | Introduced Uncommon PHARB | |||
| Tradescantia ohiensis Raf. Smooth Spiderwort County Record (GP #20-53) | Native Rare PHARB | |||
| Tradescantia virginiana L. Virginia Spiderwort | Introduced Historic CNH | |||
Pontederiaceae | ||||
| Pontederia cordata L. [Pontederia cordata var. lancifolia (Muhl.) Torrey] Pickerel Weed | Native Uncommon PHARB | |||
Ceratophyllaceae | ||||
| Ceratophyllum demersum L. Common hornwort County Record (GP #21-98) | Native Unknown PHARB | |||
| Ceratophyllum echinatum A. Gray Forked Coontail County Record (MDC 2010) | Native Rare PHARB | |||
Lardizabalaceae | ||||
| Akebia quinata (Houtt.) Dcne. Five-leaved Akebia Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
Berberidaceae | ||||
| Berberis thunbergii DC. Japanese Barberry | Introduced, Invasive Uncommon PHARB | |||
| Berberis vulgaris L. European Barberry | Introduced Historic CNH | |||
| Podophyllum peltatum L. Mayapple | Introduced Rare PHARB | |||
Ranunculaceae | ||||
| Actaea pachypoda Ell. [Actaea alba auct. non L. P. Miller] Doll's Eyes, White Baneberry | Native Rare PHARB | |||
| Actaea rubra (Aiton) Willd. Red Baneberry | Native Historic CNH | |||
| Anemone quinquefolia var. quinquefolia L. Wood Anemone | Native Abundant PHARB | |||
| Anemone virginiana var. virginiana L. Stout Thimbleweed | Native Historic | |||
| Aquilegia canadensis L. Columbine | Native Rare PHARB | |||
| Clematis terniflora DC. [Clematis paniculata Thunb.] Yam-leaf Clematis | Introduced Common PHARB | |||
| Ficaria verna Huds. [Ranunculus ficaria ssp. bulbifera (Marsden-Jones) Lawalree] Fig-crowfoot, Lesser Celandine | Introduced Rare PHARB | |||
| Ranunculus abortivus L. [Ranunculus abortivus var. acrolasius Fern.] Kidney-leaved Buttercup, Crowfoot | Native Occasional PHARB | |||
| Ranunculus acris L. [Ranunculus acris var. latisectus G. Beck] Tall, Common, or Meadow Buttercup | Introduced Occasional PHARB | |||
| Ranunculus aquatilis var. diffusus Withering [Ranunculus trichophyllus var. diffusus L.] White Water Crowfoot | Native Historic CNH | |||
| Ranunculus bulbosus L. Bulbous Buttercup or Crowfoot | Introduced Common PHARB | |||
| Ranunculus cymbalaria Pursh Seaside Crowfoot | Native Rare CNH | |||
| Ranunculus flabellaris Raf. Yellow Water Buttercup or Crowfoot | Native Historic PHARB | |||
| Ranunculus recurvatus var. recurvatus Poiret Hooked Buttercup or Crowfoot | Native Historic CNH | |||
| Ranunculus repens L. Creeping or Spotted Buttercup | Introduced Rare PHARB | |||
| Thalictrum pubescens Pursh [Thalictrum pubescens var. hebecarpum (Fern.) Boivin] Tall Meadow Rue | Native Uncommon PHARB | |||
Papaveraceae | ||||
| Chelidonium majus L. Celandine | Introduced Common PHARB | |||
| Glaucium flavum Crantz Sea or Horned Poppy | Introduced, Invasive Uncommon PHARB | |||
Platanaceae | ||||
| Platanus occidentalis L. Sycamore, Buttonwood | Introduced Historic PHARB | |||
Hamamelidaceae | ||||
| Hamamelis virginiana L. Witch Hazel | Native Common PHARB | |||
Crassulaceae | ||||
| Crassula aquatica (L.) Schoenl. [Tillaea aquatica L.] Shore Pygmyweed Previously historic, re-established in 2019 (GP #19-97) | Native, Threatened Rare PHARB | |||
| Hylotelephium telephium ssp. telephium (L.) H. Ohba [Sedum telephium L.] Garden Orpine | Introduced Historic | |||
| Sedum acre L. Wall Sedum, Mossy Stonecrop | Introduced Rare PHARB | |||
Haloragaceae | ||||
| Myriophyllum aquaticum (Vell.) Verdc. Parrot's-feather Water-milfoil County Record (GP #20-250) | Introduced Rare PHARB | |||
| Myriophyllum humile (Raf.) Morong Lowly Water-milfoil | Native Occasional PHARB | |||
| Myriophyllum pinnatum (Walter) B.S.P. [Myriophyllum scabratum Michaux] Pinnate Water-milfoil Only known county occurrence is from the Elizabeth Islands | Native, Special Concern Historic CNH | |||
| Myriophyllum spicatum L. Spiked or European Water-milfoil | Introduced, Invasive Uncommon PHARB | |||
| Myriophyllum tenellum Bigelow Leafless Water-milfoil | Native Occasional PHARB | |||
| Proserpinaca palustris L. [Proserpinaca palustris var. crebra Fern & Griscom] Mermaid-weed | Native Common PHARB | |||
| Proserpinaca pectinata Lam. Comb-leaved Mermaid-weed | Native Rare PHARB | |||
Grossulariaceae | ||||
| Ribes cynosbati L. Pasture Gooseberry | Introduced Unknown | |||
| Ribes hirtellum Michaux [Ribes hirtellum var. calcicola (Fern.) Fern.] Swamp or Downy Gooseberry | Native Occasional PHARB | |||
| Ribes rubrum L. [Ribes sativum Syme] Red Currant | Introduced Uncommon CNH | |||
| Ribes uva-crispa var. sativum DC. [Ribes grossularia L.] European Gooseberry | Introduced Unknown | |||
Saxifragaceae | ||||
| Chrysosplenium americanum Schwein. ex Hooker Golden Saxifrage, Water Mat, Water Carpet | Native Occasional PHARB | |||
Vitaceae | ||||
| Ampelopsis heterophylla var. brevipedunculata C.L. Li [Ampelopsis brevipedunculata (Maxim.) Trautv.] Porcelain Berry | Introduced Abundant PHARB | |||
| Parthenocissus inserta (Kerner) Fritsch Ticket-creeper | Native Uncommon PHARB | |||
| Parthenocissus quinquefolia (L.) Planchon Virginia Creeper, Woodbine Only known county occurrence is from the Elizabeth Islands | Native Common PHARB | |||
| Parthenocissus tricuspidata (Sieb. & Zucc.) Planchon Boston Ivy | Introduced Historic CNH | |||
| Vitis aestivalis var. aestivalis Michaux Silver-leaved Grape | Native Rare PHARB | |||
| Vitis aestivalis var. bicolor Deam [Vitis aestivalis var. argentifolia (Munson) Fern.] Silver-leaved Grape | Native Uncommon PHARB | |||
| Vitis labrusca L. Fox Grape | Native Common PHARB | |||
Celastraceae | ||||
| Celastrus orbiculatus Thunb. Oriental Bittersweet | Introduced, Invasive Abundant PHARB | |||
| Celastrus scandens L. American Bittersweet, Waxwork | Native, Threatened Historic CNH | |||
| Euonymus alatus (Thunb.) Sieb. Burning Bush County Record (EL 2015) | Introduced, Invasive Rare PHARB | |||
| Euonymus europaeus L. European Spindle Tree | Introduced Rare PHARB | |||
| Euonymus fortunei (Turcz.) Hand.-Mazz. Wintercreeper County Record (GP #20-05) | Introduced Uncommon PHARB | |||
Oxalidaceae | ||||
| Oxalis corniculata L. [Oxalis repens Thunb.] Creeping Wood Sorrel | Introduced Occasional PHARB | |||
| Oxalis dillenii Jacq. Southern or Showy Yellow Woodsorrel | Native Unknown PHARB | |||
| Oxalis stricta L. [Oxalis europaea Jordan] Common Yellow Woodsorrel | Native Common PHARB | |||
Hypericaceae | ||||
| Hypericum boreale (Britton) Bicknell Northern Dwarf St. John's-Wort | Native Common PHARB | |||
| Hypericum canadense L. Canadian St. John's-Wort | Native Common PHARB | |||
| Hypericum dissimulatum Bicknell Bicknell's St. John's-Wort | Native Historic CNH | |||
| Hypericum ellipticum Hooker Pale St. John's-Wort | Native Historic PHARB | |||
| Hypericum gentianoides (L.) B.S.P. Pineweed, Orange Grass | Native Common PHARB | |||
| Hypericum mutilum L. Dwarf St. John's-Wort | Native Common PHARB | |||
| Hypericum perforatum L. Common St. John's-Wort | Introduced Common PHARB | |||
| Hypericum prolificum L. Shrubby St. John's-Wort | Introduced Unknown | |||
| Hypericum punctatum Lam. Spotted St. John's-Wort | Native Rare CNH | |||
| Triadenum virginicum (L.) Raf. [Hypericum virginicum L.] Marsh or Pink St. John's-Wort | Native Common PHARB | |||
Elatinaceae | ||||
| Elatine minima (Nutt.) Fischer & C.A. Meyer Lesser Waterwort | Native Rare PHARB | |||
Violaceae | ||||
| Viola affinis Le Conte [Viola latiuscula Greene] Le Conte's Violet | Native Occasional PHARB | |||
| Viola blanda Willd. Sweet White Violet | Native Historic | |||
| Viola cucullata Aiton Blue Marsh Violet | Native Common PHARB | |||
| Viola labradorica Schrank American Dog Violet | Introduced Rare PHARB | |||
| Viola lanceolata ssp. lanceolata L. Lance-leaf Violet | Native Occasional PHARB | |||
| Viola odorata L. English Violet County Record (GP #20-12) | Introduced Rare PHARB | |||
| Viola pallens (Banks ex DC.) Brainerd [Viola macloskeyi ssp. pallens (Banks ex DC.) Baker] Northern White Violet | Native Occasional PHARB | |||
| Viola pedata L. Bird's Foot Violet | Native Common PHARB | |||
| Viola primulifolia L. [Viola primulifolia var. acuta (Bigelow) Torr. & Gray] Primrose-leaf Violet | Native Historic CNH | |||
| Viola sagittata var. ovata (Nutt.) Torr. & Gray [Viola fimbriatula J. E. Smith] Arrowhead Violet | Native Common PHARB | |||
| Viola sagittata var. sagittata Aiton Erect Arrowhead Violet | Native Historic CNH | |||
| Viola sororia Willd. [Viola papilionacea Pursh p. p.] Common Blue or Dooryard Violet | Native Occasional PHARB | |||
| Viola tricolor L. Johnny-jump-up | Introduced Waif PHARB | |||
Salicaceae | ||||
| Populus ×canescens (Ait.) Sm. Grey Poplar | Introduced Historic CNH | |||
| Populus ×jackii Sarg. [Populus balsamifera × P. deltoides] Balm-of-Gilead | Introduced Historic | |||
| Populus alba L. White or Silver Poplar | Introduced Occasional PHARB | |||
| Populus deltoides Bartram ex Marsh. Cottonwood | Introduced Rare CNH | |||
| Populus grandidentata Michaux Big-toothed Aspen | Native Occasional PHARB | |||
| Populus tremuloides Michx. Quaking Aspen | Native Uncommon PHARB | |||
| Salix ×conifera Wangenh. (pro sp.) [Salix discolor × S. humilis] Conifer Willow | Native Historic | |||
| Salix ×smithiana Willd. Smith Willow | Introduced Historic | |||
| Salix bebbiana Sarg. Bebb's or Long-beaked Willow | Introduced Historic CNH | |||
| Salix cinerea ssp. cinerea L. [Salix atrocinerea Brotero] Gray Willow | Introduced Common PHARB | |||
| Salix cinerea ssp. oleifolia (Sm.) Macreight Gray Willow | Introduced Uncommon CNH | |||
| Salix discolor Muhl. [Salix discolor var. latifolia Andersson] Large Pussy Willow | Native Rare PHARB | |||
| Salix humilis Marsh Prairie or Upland Willow | Native Historic CNH | |||
| Salix lucida ssp. lucida Muhl. Shinning Willow | Native Historic CNH | |||
| Salix nigra Marsh. Black Willow | Native Rare PHARB | |||
| Salix occidentalis [Salix humilis var. microphylla (Anderss.) Fern.] Dwarf Prairie Willow | Native Uncommon PHARB | |||
| Salix pentandra L. Bayleaf or Laurel Willow Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Salix purpurea L. Basket Willow, Purple Osier | Introduced Historic PHARB | |||
Euphorbiaceae | ||||
| Acalypha gracilens Gray Slender Three-seeded Mercury | Native Rare PHARB | |||
| Acalypha rhomboidea Raf. Broad Three-seeded Mercury County Record (GP #16-157) | Native Rare PHARB | |||
| Acalypha virginica L. Three-seeded Mercury | Native, Watch List Historic CNH | |||
| Euphorbia cyparissias L. Cypress Spurge | Introduced, Potentially invasive Uncommon PHARB | |||
| Euphorbia helioscopia L. Sun Spurge County Record (EL 2011) | Introduced Rare PHARB | |||
| Euphorbia maculata L. [Chamaesyce maculata (L.) Small] Milk Purslane, Spotted Spurge, Eyebane | Native Common PHARB | |||
| Euphorbia polygonifolia L. [Chamaesyce polygonifolia (L.) Small] Seaside Spurge | Native Common PHARB | |||
| Euphorbia virgata Waldst. & Kit. Slender Leafy Spurge County Record (GP #19-48) | Introduced Rare PHARB | |||
Linaceae | ||||
| Linum intercursum Bickn. Sandplain Flax, Bicknell's Yellow Flax | Native, Watch List Occasional PHARB | |||
| Linum medium var. texanum (Planchon) Fern. Texan Flax or Common Yellow Flax | Native, Threatened Rare PHARB | |||
| Linum striatum Walter [Linum striatum var. multijugum Fern.] Ridgestem Yellow Flax | Native, Watch List Historic CNH | |||
| Linum usitatissimum L. Flax | Introduced Historic | |||
| Linum virginianum L. Woodland, Spreading, or Common Yellow Flax | Native Rare PHARB | |||
Fabaceae | ||||
| Albizia julibrissin Durazz. Persian Silk Tree County Record (GP #21-65) | Introduced PHARB | |||
| Amphicarpaea bracteata (L.) Fern. [Amphicarpaea bracteata var. comosa (L.) Fern.] Hog Peanut | Native PHARB | |||
| Apios americana Medicus Groundnut | Native Occasional PHARB | |||
| Baptisia tinctoria (L.) R. Br. ex Aiton f. [Baptisia tinctoria f. crebra Fern.] Yellow Wild Indigo, Rattleweed | Native Common PHARB | |||
| Chamaecrista fasciculata (Michaux) Greene [Cassia fasciculata Michaux] Partridge Pea | Native Historic CNH | |||
| Chamaecrista nictitans ssp. nictitans (L.) Moench [Cassia nictitans L.] Sensitive Plant | Native Historic | |||
| Cytisus scoparius var. scoparius (L.) Link Scotch Broom | Introduced Occasional PHARB | |||
| Desmodium canadense (L.) DC. Canadian or Showy Tick Trefoil | Native Historic CNH | |||
| Desmodium ciliare (Muhl. ex Willd.) DC. Hairy Small-leaved Tick Trefoil | Native Occasional PHARB | |||
| Desmodium marilandicum (L.) DC. Maryland Tick Trefoil | Native Historic | |||
| Desmodium obtusum (Muhl. ex Willd.) DC. [Desmodium rigidum (Ell.) DC.] Stiff Tick Trefoil | Native Historic CNH | |||
| Desmodium rotundifolium DC. Prostrate or Round-leaved Tick Trefoil | Native Historic CNH | |||
| Genista tinctoria L. Dyer's Greenweed, Woad Waxen, Whin Only known county occurrence is from the Elizabeth Islands | Introduced Rare CNH | |||
| Gleditsia triacanthos L. Honey Locust | Native Unknown PHARB | |||
| Hylodesmum nudiflorum (L.) H. Ohashi & R.R. Mill [Desmodium nudiflorum (L.) DC.] Naked Tick Trefoil | Native Uncommon PHARB | |||
| Kummerowia striata (Thunb.) Schindl. Japanese Clover County Record (GP #21-130) | Introduced PHARB | |||
| Lathyrus japonicus var. maritimus (L.) Kartesz & Gandhi [Lathyrus japonicus var. glaber (Ser.) Fern.] Beach Pea | Native Common PHARB | |||
| Lathyrus latifolius L. Everlasting or Perennial Pea | Introduced Occasional PHARB | |||
| Lathyrus palustris L. [Lathyrus palustris var. myrtifolius (Muhl. ex Willd.) Gray] Marsh Pea, Vetchling Previously historic, re-established in 2018 (GP #18-63) | Native, Watch List Rare PHARB | |||
| Lespedeza ×brittonii Bicknell [Lespedeza procumbens × L. virginica] Britton's Bush Clover | Native Historic | |||
| Lespedeza ×nuttallii Darl. [Lespedeza hirta var. dissimulans Fern.] Nuttall's Bush Clover | Native Historic | |||
| Lespedeza angustifolia (Pursh) Ell. Narrow-leaved Bush Clover | Native, Watch List Rare PHARB | |||
| Lespedeza bicolor Turcz. Shrubby Bush Clover County Record (EL 2009) | Introduced Rare PHARB | |||
| Lespedeza capitata Michaux Round-headed Bush Clover | Native Common PHARB | |||
| Lespedeza cuneata (Dum.-Cours.) G. Don Chinese Bush Clover County Record (KF 2011) | Introduced Occasional PHARB | |||
| Lespedeza cyrtobotrya Miq. Curved Bush Clover | Introduced Rare PHARB | |||
| Lespedeza hirta ssp. hirta (L.) Hornem. [Lespedeza hirta × L. violacea] Hairy Bush Clover | Native Common PHARB | |||
| Lespedeza procumbens Michaux Trailing Bush Clover | Native Occasional PHARB | |||
| Lespedeza stuevei Nutt. Stueve's or Velvety Bush Clover | Native, Watch List Uncommon PHARB | |||
| Lespedeza violacea (L.) Pers. [Lespedeza intermedia (S. Watson) Britton] Wand or Intermediate Bush Clover | Native Uncommon PHARB | |||
| Lespedeza virginica (L.) Britton Virginia or Slender Bush Clover | Native Uncommon PHARB | |||
| Lotus corniculatus L. Birdsfoot Trefoil | Introduced Common PHARB | |||
| Medicago falcata L. [Medicago sativa ssp. falcata (L.) Arcang.] Yellow Alfalfa | Introduced Historic CNH | |||
| Medicago lupulina L. Black Medick, Nonesuch | Introduced Occasional PHARB | |||
| Medicago sativa L. Blue Alfalfa | Introduced Historic CNH | |||
| Melilotus albus Medicus Sweet Clover | Introduced Common PHARB | |||
| Melilotus officinalis (L.) Lam. Yellow Sweet Clover | Introduced Rare PHARB | |||
| Phaseolus polystachios (L.) B.S.P. Wild Bean | Native Historic | |||
| Pueraria montana var. lobata (Willd.) Maesen & S. Almeida Kudzu | Introduced, Invasive Rare PHARB | |||
| Robinia hispida var. hispida L. Bristly Locust, Rose Acacia | Introduced Rare PHARB | |||
| Robinia pseudoacacia L. Black Locust | Introduced, Invasive Common PHARB | |||
| Securigera varia (L.) Lassen [Coronilla varia L.] Crown Vetch | Introduced Common PHARB | |||
| Strophostyles helvola (L.) Ell. Beach or Wild Bean | Native Occasional PHARB | |||
| Strophostyles umbellata (Muhl.) Britt. Pink Wild Bean | Native Historic | |||
| Tephrosia virginiana (L.) Pers. Goat's Rue | Native, Watch List Common PHARB | |||
| Trifolium arvense L. Rabbitfoot Clover | Introduced Common PHARB | |||
| Trifolium aureum Pollich [Trifolium agrarium L.] Palmate or Yellow Hop Clover | Introduced Uncommon PHARB | |||
| Trifolium campestre Schreber [Trifolium procumbens L.] Pinnate or Low Hop Clover | Introduced Common PHARB | |||
| Trifolium dubium Sibth. Little Hop Clover | Introduced Common PHARB | |||
| Trifolium hybridum L. Alsike Clover | Introduced Historic, Waif PHARB | |||
| Trifolium incarnatum L. Crimson or Italian Clover | Introduced Rare PHARB | |||
| Trifolium pratense L. [Trifolium pratense var. sativum (P. Miller) Schreber] Red Clover | Introduced Common PHARB | |||
| Trifolium repens L. White Clover | Introduced Common PHARB | |||
| Ulex europaeus L. Gorse, Furze, Whin | Introduced Historic CNH | |||
| Vicia cracca ssp. cracca L. Bird or Cow Vetch, Tufted Vetch | Introduced Rare PHARB | |||
| Vicia faba L. Broad Bean | Introduced Historic, Waif | |||
| Vicia sativa ssp. nigra (L.) Ehrh. [Vicia angustifolia var. angustifolia L.] Narrow-leaved Vetch | Introduced Rare PHARB | |||
| Vicia tetrasperma (L.) Schreber [Vicia tetrasperma var. tenuissima Druce] Sparrow Vetch or Four-seeded Vetch | Introduced Uncommon PHARB | |||
| Vicia villosa Roth Hairy or Winter Vetch | Introduced Common PHARB | |||
| Wisteria floribunda (Willd.) DC. Japanese wisteria County record (GP #17-11) | Introduced Uncommon PHARB | |||
Polygalaceae | ||||
| Polygala cruciata var. aquilonia Fern. & Schub. Cross-leaved Milkwort | Native Uncommon PHARB | |||
| Polygala nuttallii Torrey & A. Gray Nuttall's Milkwort | Native, Watch List Occasional PHARB | |||
| Polygala polygama Walter Racemed or Bitter Milkwort | Native Occasional PHARB | |||
| Polygala sanguinea L. Purple or Common Milkwort | Native Occasional PHARB | |||
| Polygala verticillata L. [Polygala verticillata var. isocycla Fern.] Whorled Milkwort | Native, Watch List Rare PHARB | |||
Rosaceae | ||||
| Agrimonia eupatoria L. Medicinal Agrimony | Introduced Unknown | |||
| Agrimonia gryposepala Wallr. Common or Woodland Agrimony | Native Uncommon PHARB | |||
| Agrimonia pubescens Wallr. [Agrimonia bicknellii (Kearney) Rydb.] Downy Agrimony | Native, Threatened Rare PHARB | |||
| Agrimonia striata Michx. Woodland Agrimony | Native Unknown | |||
| Amelanchier canadensis (L.) Medicus Juneberry, Eastern Serviceberry | Native PHARB | |||
| Amelanchier laevis Wieg. [Amelanchier arborea var. laevis (Wiegand)] Smooth Shadbush or Serviceberry | Native PHARB | |||
| Amelanchier nantucketensis Bickn. [Amelanchier stolonifera f. micropetala (B.L. Robins). Rehder] Nantucket Shadbush | Native, Watch List Occasional PHARB | |||
| Amelanchier spicata (Lam.) K. Koch [Amelanchier stolonifera Wiegand] Running Shadbush | Native Rare PHARB | |||
| Argentina egedii ssp. groenlandica (Tratt.) A. Löve [Potentilla egedii var. groenlandica Tratt.] Saltmarsh Silverweed | Native Rare PHARB | |||
| Aronia arbutifolia (L.) Ell. [Pyrus arbutifolia (L.) L. f.] Red Chokeberry | Native Occasional PHARB | |||
| Aronia floribunda (Lindl.) Spach [Aronia ×prunifolia (Marsh.) Rehder] Purple Chokeberry | Native Occasional PHARB | |||
| Aronia melanocarpa (Michaux) Ell. [Pyrus melanocarpa (Michaux) Willd.] Black Chokeberry | Native Occasional PHARB | |||
| Crataegus brainerdii Sarg. Brainerd's Hawthorn | Native Historic | |||
| Crataegus chrysocarpa var. chrysocarpa Ashe Round-leaved or Fireberry Hawthorn | Native Historic CNH | |||
| Crataegus crus-galli L. [Crataegus crus-galli var. exigua (Sarg.) Eggleston] Cockspur Hawthorn | Introduced PHARB | |||
| Crataegus flavida Sarg. Yellow Hawthorn | Native Rare PHARB | |||
| Crataegus macrosperma Ashe [Crataegus roanensis Ashe] Big-seeded Hawthorn | Native Historic CNH | |||
| Crataegus pruinosa (Wendl. f.) K. Koch [Crataegus rugosa Ashe] Frosted Hawthorn | Native Historic CNH | |||
| Crataegus schizophylla Egglest. Cut-leaf Hawthorn Previously historic, re-established in 2007 (AH) | Native Rare PHARB | |||
| Fragaria vesca L. Woodland Strawberry | Introduced Occasional | |||
| Fragaria virginiana Duchesne Common Strawberry | Native PHARB | |||
| Geum aleppicum var. strictum (Ait.) Clausen [Geum strictum Ait.] Yellow Avens | Introduced Historic | |||
| Geum canadense var. canadense Jacq. [Geum canadense var. camporum (Rydb.) Fern. &] White Avens | Native Common PHARB | |||
| Geum virginianum L. Virginia or Cream-colored Avens | Native, Watch List Historic CNH | |||
| Malus prunifolia (Willd.) Borkh. Plumleaf Crabapple County Record (GP #21-79) | Introduced PHARB | |||
| Malus pumila P. Miller Apple | Introduced PHARB | |||
| Malus toringo (Siebold) Siebold ex de Vriese Siebold Crabapple County Record (GP #21-93) | Introduced PHARB | |||
| Potentilla argentea L. Silvery or Hoary Cinquefoil, Five-fingers | Introduced Common PHARB | |||
| Potentilla canadensis L. [Potentilla pumila Poir.] Dwarf Cinquefoil, Running Five-fingers | Introduced Common PHARB | |||
| Potentilla norvegica L. Three-finger, Rough Cinquefoil, Strawberry Weed | Native Historic PHARB | |||
| Potentilla recta L. Rough-fruited Cinquefoil, Sulphur Cinquefoil | Introduced Occasional PHARB | |||
| Potentilla simplex Michaux [Potentilla simplex var. calvescens Fern.] Old Field Cinquefoil, Five-fingers | Native Common PHARB | |||
| Prunus avium (L.) L. Sweet, Bing, or Mazzard Cherry | Introduced Rare PHARB | |||
| Prunus maritima var. maritima Marsh. Beach Plum | Native Common PHARB | |||
| Prunus nigra Aiton Canada or Horse Plum | Introduced Historic, Waif CNH | |||
| Prunus serotina var. serotina Ehrh. Black Cherry | Native Common PHARB | |||
| Prunus virginiana var. virginiana L. Choke Cherry | Native Historic CNH | |||
| Pyrus calleryana Decne. Bradford Pear County Record (GP #19-02) | Introduced Rare PHARB | |||
| Pyrus communis L. European Pear County Record (GP #19-14) | Introduced Rare PHARB | |||
| Rosa arvensis Huds. Field Rose County Record (SS 2014) | Introduced Rare PHARB | |||
| Rosa carolina ssp. carolina L. Pasture or Carolina Rose | Native Occasional PHARB | |||
| Rosa luciae Franch. & Rochebr. ex Crépin Memorial Rose County Record (GP #19-103) | Introduced Uncommon PHARB | |||
| Rosa multiflora Thunb. ex Murray Multiflora Rose | Introduced, Invasive Common | |||
| Rosa nitida Willd. Shining Rose Observed by MacKeever (notes) 1961, Chilmark | Native Historic | |||
| Rosa palustris Marsh. Swamp Rose | Native Uncommon PHARB | |||
| Rosa rubiginosa L. [Rosa eglanteria L.] Sweetbrier, Eglantine | Introduced Historic CNH | |||
| Rosa rugosa Thunb. Saltspray or Japanese Rose | Introduced Common PHARB | |||
| Rosa virginiana P. Miller Low or Virginia Rose | Native Common PHARB | |||
| Rubus allegheniensis Porter Common, Sow-teat, or Allegheny Blackberry | Native Common PHARB | |||
| Rubus arenicola Blanchard New England Sand Blackberry | Native Historic CNH | |||
| Rubus bifrons Vest ex Tratt. Double-leaved Blackberry | Introduced PHARB | |||
| Rubus canadensis L. Smooth Blackberry | Native Historic | |||
| Rubus flagellaris Willd. Northern or Whip Dewberry | Native Common PHARB | |||
| Rubus frondosus Bigelow Leafy or Brainerd's Blackberry | Native Historic CNH | |||
| Rubus hispidus L. Swamp Dewberry | Native Abundant PHARB | |||
| Rubus idaeus ssp. strigosus (Mich.) Focke Wild Red Raspberry | Native Historic | |||
| Rubus laciniatus Willd. Evergreen or Cut-leaved Blackberry | Introduced Historic CNH | |||
| Rubus occidentalis L. Black Raspberry | Native PHARB | |||
| Rubus pensilvanicus Poiret Pennsylvania or Highbush Blackberry | Native Historic CNH | |||
| Rubus phoenicolasius Maxim. Wineberry | Introduced Common PHARB | |||
| Rubus pubescens Raf. Dwarf or Running Raspberry | Native Historic | |||
| Rubus vermontanus Blanchard Vermont Blackberry | Native Historic CNH | |||
| Sorbaria sorbifolia (L.) A. Braun False Spiraea County Record (GP #20-120) | Introduced Rare PHARB | |||
| Sorbus aucuparia L. European Mountain-ash County Record (CS 2017) | Introduced Rare | |||
| Spiraea alba var. latifolia (Aiton) Dippel [Spiraea latifolia (Aiton) Borkh.] Meadowsweet | Native Historic CNH | |||
| Spiraea tomentosa L. Steeple Bush, Hardhack | Native Common PHARB | |||
Rhamnaceae | ||||
| Berchemia scandens (Hill) K. Koch Supple-jack | Introduced Unknown | |||
| Frangula alnus P. Miller [Rhamnus frangula L.] Glossy, Smooth, or European Buckthorn | Introduced, Invasive Common PHARB | |||
| Rhamnus cathartica L. Common Buckthorn | Introduced, Invasive Historic CNH | |||
Elaeagnaceae | ||||
| Elaeagnus angustifolia L. Russian Olive, Oleaster, Silverberry | Introduced Rare PHARB | |||
| Elaeagnus umbellata var. parvifolia (Royle) Schneid. Autumn Olive, Oleaster | Introduced, Invasive Abundant PHARB | |||
Ulmaceae | ||||
| Ulmus americana L. American Elm | Introduced Historic CNH | |||
Cannabaceae | ||||
| Humulus lupulus L. Hops Previously historic, re-established in 2019 (GP #19-261) | Introduced Rare PHARB | |||
Moraceae | ||||
| Morus alba L. White Mulberry Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
Urticaceae | ||||
| Boehmeria cylindrica (L.) Sw. [Boehmeria cylindrica var. drummondiana (Weddell) Weddell] False Nettle, Bog Hemp | Native Common PHARB | |||
| Pilea pumila (L.) A. Gray Clearweed, Richweed Previously historic, re-established in 2010 (MDC #2038) | Native Uncommon PHARB | |||
| Urtica dioica ssp. dioica L. Stinging Nettle | Introduced Rare PHARB | |||
| Urtica dioica ssp. gracilis (Aiton) Selander [Urtica dioica var. procera (Muhl. ex Willd.)] Slender Stinging Nettle | Native Rare PHARB | |||
Cucurbitaceae | ||||
| Cucumis melo L. Cantaloupe, Honeydew Melon | Introduced Unknown | |||
| Cucurbita maxima Dcne. Squash Only known county occurrence is from the Elizabeth Islands | Introduced Unknown CNH | |||
| Echinocystis lobata (Michaux) Torrey & A. Gray Wild or Prickly Cucumber Observed by MacKeever (notes) 1960, Edgartown | Introduced Historic | |||
| Sicyos angulatus L. Bur Cucumber | Native Unknown | |||
Fagaceae | ||||
| Castanea crenata Siebold & Zucc. Korean Chestnut New England Record (GP #20-189) | Introduced Rare PHARB | |||
| Castanea dentata (Marsh.) Borkh. American Chestnut | Native Historic CNH | |||
| Castanea mollissima Blume Chinese Chestnut | Introduced PHARB | |||
| Fagus grandifolia Ehrh. [Fagus grandifolia var. caroliniana (Loudon) Fern. &] American Beech | Native Common CNH | |||
| Quercus ×faxonii Trel. Faxon's hybrid oak | Native PHARB | |||
| Quercus ×fernowii Trel. [Quercus alba × Quercus stellata] Hybrid Oak | Native Unknown | |||
| Quercus ×rehderii Trel. [Quercus ilicifolia × Q. velutina] Rehder's Oak Previously historic, re-established in 2003 (TB) | Native PHARB | |||
| Quercus ×stelloides Palmer [Quercus prinoides × Q. stellata] Stelloides Oak Previously historic, re-established in 2017 (TB) | Native PHARB | |||
| Quercus alba L. White Oak | Native Common PHARB | |||
| Quercus coccinea Muenchh. Scarlet Oak | Native Uncommon PHARB | |||
| Quercus ilicifolia Wangenh. Scrub, Bear, or Holly-leaved Oak | Native Common PHARB | |||
| Quercus prinoides Willd. [Quercus prinoides var. rufescens Rehder] Dwarf Chinquapin Oak or Dwarf Chestnut Oak | Native Common PHARB | |||
| Quercus robur L. English Oak Previously historic, re-established in 2010 (KF,TB) | Introduced Uncommon PHARB | |||
| Quercus rubra L. [Quercus rubra var. ambigua (A. Gray) Fern.] Red Oak Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Quercus stellata Wangenh. Post Oak | Native, Watch List Occasional PHARB | |||
| Quercus velutina Lam. Black Oak | Native Abundant PHARB | |||
Myricaceae | ||||
| Comptonia peregrina (L.) Coulter Sweet Fern | Native Common PHARB | |||
| Morella caroliniensis (Mill.) Small [Myrica pensylvanica Loisel.] Bayberry, Wax Myrtle | Native Common PHARB | |||
| Myrica gale L. Sweet Gale | Native Occasional PHARB | |||
Juglandaceae | ||||
| Carya glabra (P. Mill) Sweet [Carya ovalis (Wangenh.) Sarg.] Pignut Hickory | Native Common PHARB | |||
| Carya ovata (Mill.) K. Koch Shagbark Hickory County Record (GP #21-187) | Native Rare PHARB | |||
| Carya tomentos (Poir. in Lam.) Nutt. [Carya alba (L.) Nutt. ex Ell.] Mockernut or White-hearted Hickory | Native Common PHARB | |||
Betulaceae | ||||
| Alnus glutinosa (L.) Gaertn. European Alder County Record (GP #20-111) | Introduced Rare PHARB | |||
| Alnus incana ssp. rugosa (Du Roi) Clausen [Alnus rugosa (Du Roi) Spreng.] Speckled Alder | Native Common PHARB | |||
| Alnus serrulata (Aiton) Willd. [Alnus serrulata var. subelliptica Fern.] Smooth Alder | Native Uncommon PHARB | |||
| Betula papyrifera Marsh. Paper Birch | Introduced Rare CNH | |||
| Betula pendula Roth Silver or Weeping Birch | Introduced Rare PHARB | |||
| Betula populifolia Marsh. Gray Birch | Native Common PHARB | |||
| Betula pubescens ssp. pubescens Ehrh. [Betula alba var. pubescens (Ehrh.) Spach] White Birch Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Carpinus caroliniana ssp. virginiana (Marsh.) Furlow Ironwood, Hornbeam, Blue Beech | Native Rare PHARB | |||
| Corylus americana Walter Hazelnut, American Filbert | Native Common PHARB | |||
| Corylus cornuta Marsh. Beaked Hazelnut | Native Occasional PHARB | |||
| Ostrya virginiana (P. Miller) K. Koch Hop Hornbeam, Ironwood | Native Uncommon PHARB | |||
Geraniaceae | ||||
| Erodium cicutarium ssp. cicutarium (L.) L'Hér. ex Aiton Redstem Felaree | Introduced Uncommon PHARB | |||
| Geranium carolinianum L. Carolina Cranesbill | Native Rare PHARB | |||
| Geranium maculatum L. Wild Geranium, Spotted Cranesbill | Native Common PHARB | |||
| Geranium pusillum L. Small or Slender Cranesbill | Introduced Historic | |||
| Geranium robertianum L. Herb-robert County Record (2014) | Native Occasional PHARB | |||
| Geranium thunbergii Siebold ex Lindl. & Paxton Japanese Cranesbill County Record (GP #21-151) | Introduced PHARB | |||
Onagraceae | ||||
| Chamerion angustifolium ssp. circumvagum (Mosq.) Kartesz [Epilobium angustifolium L.] Fireweed, Great Willow-herb | Native Unknown CNH | |||
| Circaea canadensis ssp. canadensis (L.) Hill [Circaea lutetiana ssp. canadensis L.] Enchanter's Nightshade | Native Common PHARB | |||
| Epilobium ciliatum Raf. [Epilobium glandulosum var. adenocaulon (Hauskk.) Fern.] American or Glandular Willow-herb | Native Occasional PHARB | |||
| Epilobium coloratum Biehler Purple-leaved Willow-herb | Native Occasional PHARB | |||
| Epilobium hirsutum L. Hairy Willow-herb | Introduced Historic CNH | |||
| Epilobium leptophyllum Raf. Narrow-leaved Willow-herb | Native Historic PHARB | |||
| Epilobium palustre L. [Epilobium palustre var. grammadophyllum Haussk.] Marsh Willow-herb Only known county occurrence is from the Elizabeth Islands | Native Historic CNH | |||
| Epilobium strictum Muhl. ex Sprengel Downy Willow-herb | Native Historic CNH | |||
| Ludwigia alternifolia L. Seedbox, Square-pod Water Primrose | Native Rare PHARB | |||
| Ludwigia palustris (L.) Elliott [Ludwigia palustris var. americana (DC.) Fern. Griscom] Water Purslane, Mud Loosestrife | Native Common PHARB | |||
| Oenothera biennis L. [Oenothera biennis var. pycnocarpa (Atkinson & Bartlett)] Evening Primrose | Native Common PHARB | |||
| Oenothera fruticosa ssp. fruticosa L. [Oenothera fruticosa var. linearis Michaux S. Watson] Bushy Evening Primrose, Sundrops | Native Unknown | |||
| Oenothera gaura W. L. Wagner & Hoch [Gaura biennis L.] Biennial Bee-blossom County Record (GP, EL 2013) | Introduced Rare PHARB | |||
| Oenothera glazioviana Micheli [Oenothera erythrosepala Borbás] Garden or Showy Evening Primrose Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Oenothera oakesiana (A. Gray) Robbins ex S. Watson & Coulter [Oenothera cruciata var. stenopetala Fern.] Cross-shaped Evening Primrose | Native Uncommon PHARB | |||
| Oenothera parviflora L. Small-flowered Evening Primrose | Native Common PHARB | |||
| Oenothera perennis L. Little or Small Sundrops | Native Historic CNH | |||
Lythraceae | ||||
| Decodon verticillatus (L.) Ell. [Decodon verticillatus var. laevigatus Torrey & Gray] Water Willow, Water Oleander, Swamp Loosestrife | Native Abundant PHARB | |||
| Lythrum salicaria L. [Lythrum salicaria var. gracilior Turcz.] Purple of Spiked Loosestrife | Introduced, Invasive Uncommon PHARB | |||
Melastomataceae | ||||
| Rhexia virginica L. Northern Meadow Beauty | Native Occasional PHARB | |||
Anacardiaceae | ||||
| Rhus ×pulvinata Greene (pro sp.) [Rhus glabra × R. hirta] Pulvinate Sumac | Native Unknown | |||
| Rhus copallinum var. latifolia Engler Winged Sumac | Native Common PHARB | |||
| Rhus glabra L. [Rhus borealis Greene] Smooth Sumac | Native Occasional PHARB | |||
| Rhus hirta (L.) Sudworth [Rhus typhina L.] Staghorn Sumac | Native Occasional PHARB | |||
| Toxicodendron radicans ssp. radicans (L.) Kuntze [Rhus radicans L.] Poison Ivy | Native abundant | |||
| Toxicodendron vernix (L.) Kuntze [Rhus vernix L.] Poison Sumac | Native Occasional CNH | |||
Sapindaceae | ||||
| Acer negundo var. negundo L. Boxelder County Record (GP #20-33) | Introduced Rare PHARB | |||
| Acer platanoides L. Norway Maple | Introduced, Invasive Common PHARB | |||
| Acer pseudoplatanus L. Sycamore Maple | Introduced, Invasive Common PHARB | |||
| Acer rubrum L. Red Maple | Native Abundant PHARB | |||
Simaroubaceae | ||||
| Ailanthus altissima (P. Mill.) Swingle Tree-of-Heaven | Introduced, Invasive Common PHARB | |||
Cistaceae | ||||
| Crocanthemum bicknellii (Fern.) Barnh. [Helianthemum bicknellii Fern.] Bicknell's Frostweed, Rockrose | Native Common PHARB | |||
| Crocanthemum canadense (L.) Britt. [Helianthemum canadense (L.) Michaux] Canadian Frostweed or Rockrose | Native Common PHARB | |||
| Crocanthemum dumosum Bicknell [Helianthemum dumosum (Bicknell) Fern.] Bushy Frostweed, Rockrose | Native, Watch List Unknown PHARB | |||
| Crocanthemum propinquum (Bicknell) Bicknell [Helianthemum propinquum Bicknell] Low Frostweed or Rockrose | Native Common PHARB | |||
| Hudsonia ericoides × H. tomentosa Nutt. Hybrid Beach Heather | Native Historic PHARB | |||
| Hudsonia ericoides L. Golden Heather | Native Common PHARB | |||
| Hudsonia tomentosa Nutt. [Hudsonia tomentosa var. intermedia Peck] Hudsonia, Beach Heather | Native Common PHARB | |||
| Lechea maritima var. maritima Leggett ex B.S.P. Beach Pinweed | Native Occasional PHARB | |||
| Lechea minor L. Thyme-leaved Pinweed | Native, Watch List Occasional PHARB | |||
| Lechea mucronata Raf. [Lechea villosa Ell.] Hairy Pinweed | Native Occasional PHARB | |||
| Lechea pulchella var. pulchella Raf. [Lechea leggettii Britton & Hollick] Leggett's Pinweed | Native Common PHARB | |||
Malvaceae | ||||
| Abutilon theophrasti Medik. Velvet Leaf Previously historic, re-established in 2009 (MDC #1929) | Introduced Rare PHARB | |||
| Hibiscus moscheutos L. [Hibiscus palustris L.] Rose, Swamp, or Seaside Mallow | Native Common PHARB | |||
| Hibiscus trionum L. Flower-of-an-hour | Introduced Unknown | |||
| Malva moschata L. Musk Mallow | Introduced Historic CNH | |||
| Malva neglecta Wallr. [Malva rotundifolia auct. non L.] Cheeses, Common Mallow | Introduced Rare PHARB | |||
| Tilia ×vulgaris Hayne [Tilia cordata × T. platyphyllos] Linden | Introduced unknown | |||
Brassicaceae | ||||
| Alliaria petiolata (Bieb.) Cavara & Grande Garlic Mustard County Record (GP#16-27) | Introduced, Invasive Common PHARB | |||
| Arabidopsis thaliana (L.) Heynh. Mouse Ear Cress | Introduced Common PHARB | |||
| Armoracia rusticana Gaertner, Meyer, & Scherb. [Armoracia lapathifolia Gilib.] Horse Radish | Introduced Unknown | |||
| Barbarea verna (P. Miller) Ascherson Early Winter Cress | Introduced Common PHARB | |||
| Barbarea vulgaris Ait. f. [Barbarea vulgaris var. arcuata Opiz ex Fries] Winter Cress | Introduced Occasional PHARB | |||
| Berteroa incana (L.) DC. Hoary Alyssum | Introduced Historic CNH | |||
| Brassica juncea (L.) Czern. Brown Mustard | Introduced Historic CNH | |||
| Brassica nigra (L.) W.D.J. Koch Black Mustard | Introduced Uncommon PHARB | |||
| Brassica rapa L. [Brassica rapa ssp. campestris (L.) Clapham] Turnip, Field Mustard, Chinese Cabbage | Introduced Historic CNH | |||
| Cakile edentula ssp. edentula (Bigelow) Hooker Sea Rocket | Native Common PHARB | |||
| Capsella bursa-pastoris (L.) Medik. Shepard's Purse | Introduced Occasional PHARB | |||
| Cardamine hirsuta L. Hairy Bittercress County Record (EL 2013) | Introduced Common PHARB | |||
| Cardamine pensylvanica Muhl. ex Willd. Common Bittercress | Native Rare PHARB | |||
| Draba verna L. [Erophila verna (L.) Besser] Shortpod Whitlow Grass | Introduced Common PHARB | |||
| Erysimum cheiranthoides L. Wormseed Wallflower | Introduced PHARB | |||
| Hesperis matronalis L. Dame's Rocket | Introduced, Invasive Uncommon PHARB | |||
| Lepidium campestre (L.) Aiton f. Cow or Field Cress | Introduced Common PHARB | |||
| Lepidium virginicum var. virginicum L. Wild Peppergrass, Poor Man's Pepper | Native Common PHARB | |||
| Lobularia maritima (L.) Desv. Sweet or Seaside Alyssum | Introduced Rare PHARB | |||
| Lunaria annua L. Annual Honesty County Record (TB 2011) | Introduced Occasional PHARB | |||
| Nasturtium officinale Aiton f. [Rorippa nasturtium-aquaticum (L.) Hayek] Water Cress | Introduced Rare PHARB | |||
| Nastutium microphyllum Boenn. ex Reichenb. One-rowed Water-cress County Record (MDC 2009) | Introduced Uncommon PHARB | |||
| Raphanus raphanistrum L. Wild Radish | Introduced Occasional PHARB | |||
| Raphanus sativus L. Garden Radish | Introduced Unknown | |||
| Rorippa palustris var. palustris (L.) Besser Common Yellowcress | Native Rare PHARB | |||
| Sinapis alba L. [Brassica hirta Moench] White Mustard | Introduced Historic CNH | |||
| Sisymbrium altissimum L. Tumbling or Jim Hill Mustard | Introduced Historic CNH | |||
| Sisymbrium officinale (L.) Scop. [Sisymbrium officinale var. leiocarpum DC.] Hedge Mustard | Introduced Historic CNH | |||
| Teesdalia nudicaulis (L.) Ait. f. Common shepherd's-cress County Record (GP #16-32) | Introduced Occasional PHARB | |||
| Thlaspi arvense L. Penny Cress | Introduced Occasional PHARB | |||
Santalaceae | ||||
| Comandra umbellata ssp. umbellata (L.) Nutt. Bastard Toadflax | Native Common PHARB | |||
Droseraceae | ||||
| Drosera filiformis var. filiformis Raf. Thread-leaved Sundew | Native Unknown | |||
| Drosera intermedia Hayne Spatulate-leaved Sundew | Native Uncommon PHARB | |||
| Drosera rotundifolia L. Round-leaved Sundew | Native Uncommon PHARB | |||
Plumbaginaceae | ||||
| Limonium carolinianum (Walter) Britton [Limonium nashii Small] Sea Lavender, Marsh Rosemary, Blue Statice | Native Common PHARB | |||
Polygonaceae | ||||
| Fagopyrum esculentum Moench [Fagopyrum sagittatum Gilib.] Buckwheat | Introduced PHARB | |||
| Fallopia convolvulus (L.) A. Löve [Polygonum convolvulus L.] Black Bindweed, False Buckwheat | Introduced Historic CNH | |||
| Fallopia dumetorum (L.) Holub Thicket Bindweed County Record (GP #19-159) | Introduced PHARB | |||
| Fallopia japonica var. japonica (Houtt.) R. Decr. [Polygonum cuspidatum Sieb. & Zucc.] Japanese Knotweed, Boston Bamboo | Introduced, Invasive Common PHARB | |||
| Fallopia scandens (L.) Holub [Polygonum scandens var. scandens L.] Climbing False Buckwheat, Bindweed | Native Occasional PHARB | |||
| Persicaria arifolia (L.) Haroldson [Periscaria arifolium var. pubescens (keller) Fern] Halberd-leaved Smartweed | Native Rare PHARB | |||
| Persicaria careyi (Olney) Greene [Polygonum careyi] Carey's Knotweed or Smartweed | Native Historic CNH | |||
| Persicaria coccinea (Muhl. ex Willd.) Greene Scarlet Smartweed | Native Historic PHARB | |||
| Persicaria hydropiper (L.) Opiz Water-pepper Smartweed | Introduced Rare PHARB | |||
| Persicaria hydropiperoides (Michaux) Small [Polygonum hydropiperoides Michx.] False or Mild Water-pepper | Native Occasional PHARB | |||
| Persicaria lapathifolia (L.) S.F. Gray [Polygonum lapathifolium salicifolium Sibthorp] Willow-weed, Nodding or Dockleaf Smartweed | Native PHARB | |||
| Persicaria longiseta Oriental Lady's-thumb Smartweed County Record (GP #16-119) | Introduced Occasional PHARB | |||
| Persicaria maculosa S.F. Gray [Polygonum persicaria L.] Lady's Thumb | Introduced Common PHARB | |||
| Persicaria orientalis (L.) Spach [Polygonum orientale L.] Kiss-Me-Over-the-Garden-Gate | Introduced Historic CNH | |||
| Persicaria pensylvanica (L.) G. Maza [Polygonum pensylvanicum L.] Pinkweed, Smartweed | Native Occasional PHARB | |||
| Persicaria perfoliata (L.) H.Gross Asiatic Smartweed County Record (GP #19-23) | Introduced Rare PHARB | |||
| Persicaria punctata (Ell.) Small [Polygonum punctatum Ell.] Annual or Duck Smartweed | Native Common PHARB | |||
| Persicaria sagittata (L.) H. Gross [Polygonum sagittatum (L.) H. Gross] Arrow-leaf Tearthumb | Native Common PHARB | |||
| Persicaria virginiana (L.) Gaertn. [Persicaria virginiana var. filiformis (Thunb.) J.M.H.Shaw] Jumpseed County Record (GP #18-158) | Introduced Rare PHARB | |||
| Polygonum articulatum L. [Polygonella articulata (L.) Meisner] Jointweed | Native Occasional PHARB | |||
| Polygonum aviculare ssp. neglectum (Bess.) Arcang. Dooryard Knotweed | Introduced Common PHARB | |||
| Polygonum buxiforme Small [Polygonum aviculare var. vegetum Ledeb.] Box-leaf Knotweed | Native Historic CNH | |||
| Polygonum glaucum Nutt. Seaside Knotweed | Native, Special Concern Occasional PHARB | |||
| Polygonum ramosissimum ssp. prolificum (Small) Costea & Tardif [Polygonum prolificum (Small) Robinson] Saltmarsh or Bushy Smartweed | Native Historic | |||
| Polygonum ramosissimum ssp. ramosissimum Michaux [Polygonum exsertum Small] Saltmarsh or Bushy Smartweed | Native Historic | |||
| Rumex ×pratensis Mertens & Koch [Rumex ×acutus] Hybrid Dock | Introduced Historic | |||
| Rumex acetosella ssp. pyrenaicus (Pourret ex Lapeyr.) Akeroyd [Rumex acetosella ssp. angiocarpus auct. non (Murb.)] Sheep or Red Sorrel | Introduced abundant PHARB | |||
| Rumex britannica L. [Rumex orbiculatus A. Gray] Great Water-dock | Native Occasional PHARB | |||
| Rumex crispus ssp. crispus L. Curly or Sour Dock | Introduced Common PHARB | |||
| Rumex obtusifolius ssp. obtusifolius L. Bitter or Red-veined Dock | Introduced Common PHARB | |||
| Rumex persicarioides var. fueginus (Phil.) A. Haines [Rumex maritimus var. persicarioides (L.) R.S. Mitchell] American Golden Dock | Native Uncommon PHARB | |||
| Rumex persicarioides var. persicardiodes L. American Golden Dock | Native Rare PHARB | |||
| Rumex triangulivalvis (Danser) Rech. f. [Rumex salicifolius (Danser) Rech. f.] Willow-leaf Dock | Introduced Historic CNH | |||
| Rumex verticillatus L. Swamp Dock, Water Dock | Native, Threatened Unknown | |||
Caryophyllaceae | ||||
| Agrostemma githago var. githago L. Corn Cockle | Introduced Historic CNH | |||
| Arenaria serpyllifolia L. [Arenaria serpyllifolia var. tenuior Mert. & Koch] Thyme-leaved Sandwort | Introduced Historic PHARB | |||
| Atocion armeria (L.) Raf. Garden Catchfly | Introduced Historic | |||
| Cerastium fontanum ssp. vulgare (Hartman) Greuter & Burdet [Cerastium vulgatum L.] Mouse-ear Chickweed | Introduced Abundant PHARB | |||
| Cerastium glomeratum Thuill. [Cerastium viscosum auct. non L.] Sticky Mouse-ear Chickweed Supposedly reported from Edgartown | Introduced Historic | |||
| Cerastium semidecandrum L. Chickweed Observed by B. Sorrie (notes) 1980, Oak Bluffs | Introduced Historic | |||
| Dianthus armeria L. Deptford Pink | Introduced Occasional PHARB | |||
| Dianthus barbatus L. Sweet William Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Dianthus deltoides L. Maiden Pink | Introduced Historic CNH | |||
| Dianthus plumarius L. Garden or Grass Pink | Introduced Historic | |||
| Gypsophila paniculata L. Baby's Breath Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Honckenya peploides ssp. robusta (Fern.) Hultén [Arenaria peploides var. robusta Fern.] Sea Purslane | Native Occasional PHARB | |||
| Lychnis coronaria (L.) Murr. Mullein Lychnis County Record (GP 2014) | Introduced Rare PHARB | |||
| Lychnis flos-cuculi L. Ragged Robin Lychnis County Record (GP #20-64) | Introduced Rare PHARB | |||
| Moehringia lateriflora (L.) Fenzl [Arenaria lateriflora L.] Gove Sandwort | Native Uncommon PHARB | |||
| Sagina decumbens ssp. decumbens (Ell.) Torrey & A. Gray Trailing Pearlwort | Native, Watch List Historic PHARB | |||
| Sagina japonica (Sw.) Ohwi Japanese Pearlwort County Record (GP #17-03) | Introduced Rare PHARB | |||
| Sagina procumbens L. Matted Pearlwort, Birdseye | Native Rare PHARB | |||
| Saponaria officinalis L. Bouncing Bet, Soapwort | Introduced Common PHARB | |||
| Scleranthus annuus L. Annual Knawel | Introduced Uncommon PHARB | |||
| Silene antirrhina L. Sleepy Catchfly | Native Unknown | |||
| Silene dioica (L.) Clairville [Lychnis dioica L.] Red Campion or Cockle | Introduced Historic CNH | |||
| Silene latifolia ssp. alba (P. Mill.) Greuter & Burdet [Silene alba (P. Mill.)] White Campion or Cockle | Introduced Occasional PHARB | |||
| Silene noctiflora L. Night-flowering Catchfly | Introduced unknown, waif | |||
| Silene pendula L. Nodding Catchfly | Introduced Historic | |||
| Silene vulgaris ssp. vulgaris (Moench) Garcke [Silene cucubalus Wibel] Bladder Campion | Introduced Uncommon PHARB | |||
| Spergula arvensis L. Spurrey, Corn Spurrey | Introduced Historic CNH | |||
| Spergularia canadensis ssp. canadensis (Pers.) G. Don Northern or Lesser Sand Spurrey | Native Historic CNH | |||
| Spergularia marina (L.) Griseb. [Spergularia salina J. & K. Presl] Saltmarsh Sand Spurrey | Native Uncommon PHARB | |||
| Spergularia rubra (L.) J. & K. Presl Red, Roadside, or Common Sand Spurrey | Introduced Occasional PHARB | |||
| Stellaria graminea L. Common, Meadow, or Field Stichwort | Introduced Uncommon PHARB | |||
| Stellaria media (L.) Vill. Common Chickweed | Introduced Common PHARB | |||
Amaranthaceae | ||||
| Amaranthus albus L. Tumbleweed | Introduced Historic CNH | |||
| Amaranthus blitoides S. Watson Prostrate Amaranth | Introduced Historic CNH | |||
| Amaranthus blitum L. Purple Amaranth County Record (GP #21-123) | Introduced PHARB | |||
| Amaranthus hybridus L. Green Amaranth County Record (GP #16-107) | Introduced Rare PHARB | |||
| Amaranthus pumilus Raf. Seabeach Amaranth | Native Historic | |||
| Amaranthus retroflexus L. Pigweed | Introduced Rare PHARB | |||
| Atriplex cristata Humb. & Bonpl. ex Willd. [Atriplex pentandra (Jacq.) Standley] Seabeach or Sand Orache | Native Occasional PHARB | |||
| Atriplex glabriuscula Edmonston Bracted Orache County Record (GP #20-263) | Native Rare PHARB | |||
| Atriplex patula L. Narrow-leaved Orache | Introduced Historic | |||
| Atriplex prostrata Boucher ex DC. [Atriplex patula var. hastata auct. non (L.) Gray] Halberd-leaf Orache | Native Common PHARB | |||
| Bassia hirsuta (L.) Aschers. Downy Seabite Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Chenopodium album L. [Chenopodium album var. missouriense (Aellen) Bassett &] Pigweed, Lamb's Quarters | Introduced Common PHARB | |||
| Chenopodium berlandieri var. macrocalycium (Aellen) Cronq. [Chenopodium macrocalycium Aellen] Pitseed Pigweed | Native Common PHARB | |||
| Chenopodium glaucum var. glaucum L. Oak-leaf Goosefoot, Saltpond Goosefoot | Introduced Common PHARB | |||
| Chenopodium leptophyllum (Moq.) Nutt. ex S. Wats. Narrow-leaved Goosefoot | Introduced Historic CNH | |||
| Chenopodium pratericola Rydb. [Chenopodium desiccatum var. leptophylloides (J. Murr.) Wahl] White Pigweed Only known county occurrence is from the Elizabeth Islands | Native Historic CNH | |||
| Chenopodium rubrum L. Coast Blite, Red Goosefoot | Native Rare PHARB | |||
| Chenopodium strictum Oval-seeded Goosefoot County Record (GP #17-166) | Introduced Rare PHARB | |||
| Dysphania ambrosioides L. [Chenopodium ambrosioides L.] Wormseed, Mexican Tea | Introduced Occasional PHARB | |||
| Dysphania pumilio (R. Br.) Mosyakin & Clemants [Chenopodium pumilio R. Br.] Ridged Goosefoot, Pygmy Goosefoot Only known county occurrence is from the Elizabeth Islands | Introduced Occasional CNH | |||
| Salicornia ambigua Michx. [Salicornia virginica L.] Perennial Saltwort, Glasswort | Native Common PHARB | |||
| Salicornia biglovii Torr. Dwarf Glasswort | Native Rare PHARB | |||
| Salicornia depressa Standl. Common Glasswort | Native Common PHARB | |||
| Salsola kali ssp. kali L. Prickly Saltwort | Introduced Common PHARB | |||
| Salsola kali ssp. pontica (Pallas) Mosyakin [Salsola caroliniana Walter] Carolina Saltwort Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Suaeda calceoliformis (Hook.) Moq. American Sea-blite | Native, Special Concern Rare PHARB | |||
| Suaeda linearis (Ell.) Moq. Slender or Erect Sea-blite | Native Uncommon PHARB | |||
| Suaeda maritima ssp. maritima (L.) Dumort. Saltmarsh Sea-blite | Native Common PHARB | |||
| Suaeda maritima ssp. richii (Fern.) Bassett & Crompton Herbaceous Sea-blite County Record (GP #20-259) | Native Rare PHARB | |||
Phytolaccaceae | ||||
| Phytolacca americana var. americana L. Pokeweed, Pokeberry, Poke | Native Common PHARB | |||
Nyctaginaceae | ||||
| Mirabilis nyctaginea (Michaux) MacMillan Four-o'clock, Heart-leaved Umbrellawort | Introduced Rare PHARB | |||
Molluginaceae | ||||
| Mollugo verticillata L. Carpetweed, Indian Chickweed | Introduced Common PHARB | |||
Portulacaceae | ||||
| Portulaca oleracea L. Common Purslane, Pusley | Introduced Occasional PHARB | |||
Cactaceae | ||||
| Opuntia humifusa (Raf.) Raf. Eastern Prickly Pear | Native, Endangered Rare PHARB | |||
Hydrangeaceae | ||||
| Hydrangea paniculata Siebold Panicle Hydrangea County Record (GP #21-132) | Introduced Waif PHARB | |||
Cornaceae | ||||
| Benthamidia florida (L.) Spach [Cornus florida L.] Flowering Dogwood | Native Uncommon PHARB | |||
| Chamaepericlymenum canadense (L.) Aschers. & Graebn. [Cornus canadensis L.] Bunchberry, Dwarf Cornell | Native Historic CNH | |||
| Nyssa sylvatica Marshall Beetlebung, Black or Sour Gum, Tupelo, Pepperidge | Native Common PHARB | |||
| Swida alternifolia (L. f.) Small [Cornus alternifolia L. f.] Pagoda or Alternate-leaved Dogwood | Native Uncommon PHARB | |||
| Swida racemosa (Lam.) Moldenke [Cornus racemosa Lam.] Northern Swamp Dogwood, Gray or White Dogwood Previously historic, re-established in 2015 (GP #15-06) | Native Rare PHARB | |||
| Swida sericea (L.) Holub [Cornus sericea L.] Red-osier Dogwood County Record (TB 2008) | Introduced Occasional PHARB | |||
Balsaminaceae | ||||
| Impatiens balfourii Hook. f. Balfour's Touch-me-not County Record (GP #21-166) | Introduced PHARB | |||
| Impatiens capensis Meerb. Jewelweed | Native Common PHARB | |||
Theophrastaceae | ||||
| Samolus valerandi ssp. parviflorus (Raf.) Hultén Water Pimpernel, Brookweed | Native Occasional PHARB | |||
Primulaceae | ||||
| Hottonia inflata Ell. Featherfoil, Water Violet | Native, Watch List Rare PHARB | |||
| Lysimachia arvensis (L.) U.Manns & Anderb. [Anagallis arvensis L.] Scarlet Pimpernel | Introduced Occasional PHARB | |||
| Lysimachia borealis (Raf.) U Manns & A. Anderb. [Trientalis borealis ssp. borealis Raf.] Starflower | Native Common PHARB | |||
| Lysimachia ciliata L. Fringed Loosestrife | Native Historic CNH | |||
| Lysimachia clethroides Duby Gooseneck Yellow-loosestrife County Record (GP #18-80) | Introduced Rare PHARB | |||
| Lysimachia maritima (L.) Galasso, Banfi, & Soldano [Glaux maritima L.] Sea Milkwort | Native Unknown | |||
| Lysimachia nummularia L. Creeping Yellow-loosestrife County Record (GP 2014) | Introduced, Invasive Rare PHARB | |||
| Lysimachia punctata L. Spotted or Garden Loosestrife | Introduced Rare PHARB | |||
| Lysimachia quadrifolia L. Whorled Loosestrife | Native Common PHARB | |||
| Lysimachia terrestris (L.) B.S.P. Swamp Candles, Swamp or Bulbil Loosestrife | Native Common PHARB | |||
Styracaceae | ||||
| Styrax japonicus Siebold & Zucc. Japanese Snowbell County Record (GP #19-203) | Introduced Rare PHARB | |||
Sarraceniaceae | ||||
| Sarracenia purpurea L. Pitcher-plant | Native Rare PHARB | |||
Clethraceae | ||||
| Clethra alnifolia L. Summersweet, Sweet Pepper Bush, White Alder | Native Abundant PHARB | |||
Ericaceae | ||||
| Arctostaphylos uva-ursi (L.) Sprengel Bearberry, Kinnikinnik | Native Common PHARB | |||
| Calluna vulgaris (L.) Hull Heather, Scotch Heather | Introduced Occasional PHARB | |||
| Chamaedaphne calyculata (L.) Moench [Chamaedaphne calyculata var. angustifolia (Aiton) Rehder] Leatherleaf, Cassandra | Native Rare PHARB | |||
| Chimaphila maculata (L.) Pursh Striped Pipsissewa, Spotted Wiintergreen | Native Rare PHARB | |||
| Chimaphila umbellata ssp. cisatlantica (Blake) Hultén Prince's Pine, Pipsissewa County Record (GP #18-53) | Native Rare PHARB | |||
| Corema conradii (Torrey) Torrey ex Loudon Broom Crowberry | Native, Watch List Rare PHARB | |||
| Epigaea repens L. [Epigaea repens var. glabrifolia Fern.] Mayflower, Trailing Arbutus | Native Common PHARB | |||
| Erica tetralix L. Crossleaf Heath | Introduced Historic CNH | |||
| Eubotrys racemosa (L.) Nutt. [Leucothoe racemosa (L.) A. Gray] Fetterbush, Swamp Sweetbells | Native Historic CNH | |||
| Gaultheria procumbens L. Wintergreen, Checkerberry, Teaberry | Introduced Common PHARB | |||
| Gaylussacia baccata (Wangenh.) K. Koch Black Huckleberry | Native Abundant PHARB | |||
| Gaylussacia bigeloviana (Fern.) Sorrie & Weakley [Gaylussacia dumosa var. bigeloviana Fern.] Dwarf or Bog Huckleberry County Record (GP #19-143) | Native Rare | |||
| Gaylussacia frondosa (L.) Torrey & A. Gray ex Torrey Dangleberry, Blue Tangle | Native Common PHARB | |||
| Hypopitys lanuginosa [Monotropa lanuginosa Michx.] Hairy Pine-sap County Record (GP #17-145) | Native, Watch List Occasional PHARB | |||
| Hypopitys monotropa Crantz [Monotropa hypopithys L.] Pinesap, False Beech Drops | Native PHARB | |||
| Kalmia angustifolia var. angustifolia L. Sheep Laurel, Lambkill, Wicky | Native Abundant PHARB | |||
| Kalmia latifolia L. Mountain Laurel Previously historic, but re-established in 2012 | Native Rare PHARB | |||
| Leucothoe fontanesiana (Steud.) Sleumer Fetterbush County Record (GP #19-27) | Introduced Rare PHARB | |||
| Lyonia ligustrina var. ligustrina (L.) DC. Maleberry, Male Blueberry | Native Common PHARB | |||
| Monotropa uniflora L. Indian Pipe | Native Common PHARB | |||
| Pieris japonica (Thunb.) D.Don ex G.Don Japanese Pieris | Introduced Rare PHARB | |||
| Pyrola americana Sweet [Pyrola rotundifolia var. americana (Sweet) Fern.] Pyrola, Round-leaved Shinleaf | Native Common PHARB | |||
| Pyrola elliptica Nutt. Pyrola, Elliptic Shinleaf | Native Rare PHARB | |||
| Rhododendron viscosum (L.) Torrey Swamp Azalea or Honeysuckle | Native Common PHARB | |||
| Vaccinium angustifolium Aiton [Vaccinium angustifolium var. hypolasium Fern.] Lowbush Blueberry | Native Common PHARB | |||
| Vaccinium caesariense Mackenzie New Jersey Highbush Blueberry | Native unknown PHARB | |||
| Vaccinium corymbosum L. [Vaccinium corymbosum var. glabrum A. Gray] Highbush Blueberry | Native Common PHARB | |||
| Vaccinium fuscatum Aiton [Vaccinium atrococcum (A. Gray) Heller] Black Highbush Blueberry | Native Common PHARB | |||
| Vaccinium macrocarpon Aiton Large or American Cranberry | Native Common PHARB | |||
| Vaccinium pallidum Aiton [Vaccinium vacillans Kalm ex Torrey] Early Lowbush Blueberry | Native Common PHARB | |||
Rubiaceae | ||||
| Cephalanthus occidentalis L. Buttonbush | Native Occasional PHARB | |||
| Galium album White Bedstraw County Record (GP #17-39) | Introduced Rare PHARB | |||
| Galium aparine L. Cleavers, Spring Cleavers | Native Common CNH | |||
| Galium asprellum Michaux Rough Bedstraw | Native Unknown | |||
| Galium circaezans var. hypomalacum Fern. Wild Licorice, Forest Bedstraw | Native Rare PHARB | |||
| Galium mollugo L. [Galium erectum Hudson] Field Madder, White Bedstraw | Introduced Common PHARB | |||
| Galium obtusum ssp. obtusum Bigelow Blunt-leaved or Large Marsh Bedstraw | Native Rare PHARB | |||
| Galium pilosum Aiton Hairy Bedstraw | Native Rare PHARB | |||
| Galium tinctorium var. tinctorium (L.) Scop. Stiff Marsh Bedstraw | Native Uncommon PHARB | |||
| Galium trifidum ssp. trifidum L. Tricleft or Three-lobed Bedstraw | Native Common PHARB | |||
| Galium triflorum Michaux [Galium triflorum var. asprelliforme Fern.] Sweet-scented or Woodland Bedstraw | Native Rare PHARB | |||
| Galium verum ssp. verum L. Yellow or Our Lady's Bedstraw | Introduced Historic CNH | |||
| Galium verum ssp. wirtgenii (F.W. Schultz) Oborny Wirtgen's Bedstraw | Introduced Historic CNH | |||
| Houstonia caerulea L. [Hedyotis caerulea (L.) Hooker] Bluets, Quaker Ladies | Native Common PHARB | |||
| Houstonia purpurea L. Large Bluet County Record (GP #19-57) | Native Rare PHARB | |||
| Mitchella repens L. Partridgeberry, Twinberry | Native Uncommon PHARB | |||
Gentianaceae | ||||
| Bartonia paniculata (Michaux) Muhl. Twining Screwstem | Native, Watch List Common PHARB | |||
| Bartonia virginica (L.) B.S.P. Virginia Screwstem | Native Occasional PHARB | |||
| Centaurium erythraea Raf. European Centaury County Record (GP #20-88) | Introduced Rare | |||
| Sabatia campanulata (L.) Torrey Slender Pink Marsh | Native, Endangered Historic | |||
| Sabatia stellaris Pursh Sea Pink, Marsh Pink | Native, Endangered Historic CNH | |||
Apocynaceae | ||||
| Apocynum ×floribundum Greene [Apocynum androsaemifolium ×] Intermediate Dogbane | Native Historic | |||
| Apocynum androsaemifolium L. Spreading or Pink Dogbane | Native Occasional PHARB | |||
| Apocynum cannabinum L. [Apocynum cannabinum var. hypericifolium A. Gray] Indian Hemp | Native Rare PHARB | |||
| Asclepias amplexicaulis J.E. Smith Wavy-leaved Milkweed | Native, Watch List Occasional PHARB | |||
| Asclepias exaltata L. Poke Milkweed | Native Occasional PHARB | |||
| Asclepias incarnata ssp. pulchra (Ehrh. ex Willd.) Woodson Downy Swamp Milkweed | Native Common PHARB | |||
| Asclepias purpurascens L. Purple Milkweed | Native, Endangered Historic CNH | |||
| Asclepias syriaca L. Common Milkweed | Native Common PHARB | |||
| Asclepias tuberosa L. Butterfly Weed | Native, Watch List Common PHARB | |||
| Asclepias verticillata L. Whorled Milkweed | Native, Threatened Unknown | |||
| Cynanchum louiseae Kartesz & Gandhi [Vincetoxicum nigrum (L.) Moench] Black Swallow-wort | Introduced, Invasive Uncommon | |||
| Vinca major Greater Periwinkle County record (GP #17-07) | Native Rare PHARB | |||
| Vinca minor L. Periwinkle, Myrtle | Introduced Common PHARB | |||
Convolvulaceae | ||||
| Calystegia sepium ssp. americana (Sims) Brummitt [Convolvulus sepium var. americanus Sims] Wild Morning-glory | Native Common PHARB | |||
| Convolvulus arvensis L. Field Bindweed Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Cuscuta cephalanthi Engelm. Buttonbush Dodder | Native Historic | |||
| Cuscuta compacta var. compacta Juss. ex Choisy Dense or Compact Dodder, Love Vine Previously historic, re-established in 2018 (MDC #3859) | Native Rare PHARB | |||
| Cuscuta gronovii var. gronovii Willd. ex J.A. Schultes Love Vine, Strangleweed, Swamp Dodder | Native Occasional PHARB | |||
| Cuscuta polygonorum Engelm. Smartweed Dodder | Native, Watch List Historic CNH | |||
| Ipomoea pandurata (L.) G.F.W. Meyer Wild Potato Vine | Introduced Unknown | |||
| Ipomoea purpurea (L.) Roth Common Morning Glory County Record (GP #21-172) | Introduced PHARB | |||
Solanaceae | ||||
| Datura stramonium L. [Datura stramonium var. tatula (L.) Torrey.] Jimsonweed, White Thorn-apple | Introduced Occasional PHARB | |||
| Nicandra physalodes (L.) Gaertner Apple-of-Peru | Introduced Historic | |||
| Nicotiana longiflora Cav. Long-flowered Tobacco | Introduced Historic CNH | |||
| Physalis alkekengi L. Chinese Lantern | Introduced Historic | |||
| Physalis angulata L. Cutleaf Ground Cherry | Introduced Historic | |||
| Physalis grisea (Waterfall) M. Martinez [Physalis pruinosa auct. non L.] Ground Cherry, Strawberry Tomato | Native Historic CNH | |||
| Physalis philadelphica var. immaculata Waterfall Tomatillo, Mexican Ground Cherry | Introduced Historic | |||
| Solanum carolinense var. carolinense L. Horse Nettle County Record (EL 2012) | Introduced Occasional PHARB | |||
| Solanum dulcamara var. dulcamara L. Bittersweet Nightshade, Bittersweet | Introduced Occasional PHARB | |||
| Solanum nigrum ssp. nigrum L. European Black Nightshade | Introduced Rare CNH | |||
| Solanum ptychanthum Dunal [Solanum americanum auct. non P. Miller] American Black Nightshade | Native Uncommon PHARB | |||
| Solanum rostratum Dunal [Solanum cornutum auct. non Lam.] Buffalo-bur, Sandbur | Introduced Historic CNH | |||
| Solanum triflorum Nutt. Cut-leaved Nightshade Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
Boraginaceae | ||||
| Cynoglossum amabile Stapf & Drummond Chinese Forget-Me-Not | Introduced Historic CNH | |||
| Echium vulgare L. Viper's Bugloss | Introduced Occasional PHARB | |||
| Myosotis arvensis (L.) Hill Field Scorpion Grass | Introduced Rare PHARB | |||
| Myosotis discolor Pers. Yellow-and-blue Forget-me-not County Record (GP #20-51) | Introduced Rare PHARB | |||
| Myosotis scorpioides L. True Forget-me-not | Introduced Waif PHARB | |||
| Myosotis stricta Link ex Roem. & Schult. Blue Forget-me-not County Record (GP #20-27) | Introduced Rare PHARB | |||
| Myosotis sylvatica Ehrh. ex Hoffm. Garden Forget-me-not | Introduced Waif PHARB | |||
| Myosotis verna Nutt. Spring Scorpion Grass | Native Historic CNH | |||
| Onosmodium virginianum (L.) A. DC. False Gromwell | Native Historic CNH | |||
| Symphytum officinale L. Comfrey County Record (GP #16-96) | Introduced Rare PHARB | |||
Oleaceae | ||||
| Forsythia suspensa (Thunb.) Vahl Weeping Forsythia County Record (GP #21-03) | Introduced PHARB | |||
| Fraxinus americana L. White Ash | Introduced Historic CNH | |||
| Ligustrum obtusifolium Sieb. & Zucc. Japanese Privet | Introduced Historic CNH | |||
| Ligustrum ovalifolium Hassk. California Privet | Introduced Occasional PHARB | |||
| Ligustrum vulgare L. Common or Hedge Privet | Introduced Historic CNH | |||
| Syringa vulgaris L. Lilac | Introduced Unknown | |||
Plantaginaceae | ||||
| Callitriche heterophylla var. heterophylla Pursh [Callitriche anceps Fern.] Variable Water-starwort | Native Occasional PHARB | |||
| Chelone glabra L. [Chelone glabra var. dilatata Fern. & Wiegand.] White Turtlehead | Native Rare PHARB | |||
| Chelone lyonii Pursh Lyon's or Pink Turtlehead | Introduced Historic CNH | |||
| Digitalis purpurea var. purpurea L. Common or Purple Foxglove, Digitalis | Introduced Historic CNH | |||
| Gratiola aurea Pursh Golden Pert, Golden or Yellow Hedge-hyssop | Native Common PHARB | |||
| Linaria dalmatica ssp. dalmatica (L.) P. Miller Dalmatian Toadfllax | Introduced Rare PHARB | |||
| Linaria vulgaris P. Miller Butter-and-Eggs, Common Toadflax | Introduced Common PHARB | |||
| Nuttallanthus canadensis (L.) D.A. Sutton [Linaria canadensis (L.) Chaz.] Blue Toadflax | Native Common PHARB | |||
| Plantago aristata Michaux Bracted or Rat-tail Plantain | Introduced Occasional PHARB | |||
| Plantago intermedia DC. [Plantago major var. intermedia (DC.) Pilger] Saltmarsh or Saltpond Plantain Of uncertain taxonomic status | Native Historic CNH | |||
| Plantago lanceolata L. [Plantago altissima] Narrow-leaved or English Plantain | Introduced Abundant PHARB | |||
| Plantago major L. Common or Dooryard Plantain | Introduced Common PHARB | |||
| Plantago maritima var. juncoides (Lam.) A. Gray [Plantago oliganthos R. & S.] Seaside Plantain | Native Occasional PHARB | |||
| Plantago rugelii Dcne. American, Rugel's or Pale Plantain | Native Uncommon PHARB | |||
| Plantago virginica L. Hoary, White, or Pale-seeded Plantain | Introduced Historic CNH | |||
| Veronica arvensis L. Corn Speedwell | Introduced Occasional PHARB | |||
| Veronica chamaedrys L. Germander Speedwell County Record (GP #20-42) | Introduced Rare PHARB | |||
| Veronica officinalis L. Common Speedwell, Gypsyweed | Introduced Occasional PHARB | |||
| Veronica peregrina ssp. peregrina L. Purslane Speedwell, Neckweed Only known county occurrence is from the Elizabeth Islands | Native Historic | |||
| Veronica serpyllifolia ssp. serpyllifolia L. Thyme-leaved Speedwell Previously historic, re-established in 2016 (GP #16-37) | Introduced Occasional PHARB | |||
Scrophulariaceae | ||||
| Limosella australis R. Br. [Limosella subulata Ives] Atlantic Mudwort, Saltpond Stars | Native, Watch List Occasional PHARB | |||
| Scrophularia lanceolata Pursh American or Hare Figwort | Native Historic PHARB | |||
| Scrophularia nodosa L. Common Figwort County Record (GP #18-151) | Native Rare PHARB | |||
| Verbascum blattaria L. Moth Mullein County Record (GP #20-165) | Introduced Rare PHARB | |||
| Verbascum thapsus L. Mullein, Flannel-plant | Introduced Common PHARB | |||
Linderniaceae | ||||
| Lindernia dubia var. anagallidea (Michaux) Cooperrider [Lindernia anagallidea (Michaux) Pennell] False Pimpernel | Native Occasional PHARB | |||
Bignoniaceae | ||||
| Campsis radicans (L.) Seem. ex Bureau Trumpet Creeper County Record (GP #16-133) | Introduced Occasional PHARB | |||
| Catalpa bignonioides Walter Catalpa, Indian Bean Tree | Introduced Uncommon PHARB | |||
Lentibulariaceae | ||||
| Utricularia cornuta Michaux Horned or Naked Bladderwort | Native unknown | |||
| Utricularia geminiscapa Benj. Twin-scaped, Mixed or Hidden-fruited Bladderwort | Native Rare PHARB | |||
| Utricularia gibba L. [Utricularia biflora Lam.] Humped, Swollen-spurred, or Creeping Bladderwort | Native Historic CNH | |||
| Utricularia subulata L. Slender or Zigzag Bladderwort | Native, Special Concern Historic CNH | |||
| Utricularia vulgaris ssp. macrorhiza (Le Conte) Clausen [Utricularia macrorhiza Le Conte] Great, Milfoil or Common Bladderwort | Native unknown | |||
Verbenaceae | ||||
| Verbena bonariensis L. South American Vervain | Introduced Rare PHARB | |||
| Verbena hastata var. hastata L. Blue or Common Vervain | Native Occasional PHARB | |||
| Verbena urticifolia L. White Vervain | Native Uncommon PHARB | |||
Lamiaceae | ||||
| Ajuga reptans L. Carpet Bugelweed | Introduced Occasional PHARB | |||
| Galeopsis bifida Boenn. Split-lipped Hemp-nettle County Record (GP #19-75) | Introduced Occasional PHARB | |||
| Glechoma hederacea L. [Glechoma hederacea var. micrantha Moricand] Ground Ivy, Gill-Over-the-Ground | Introduced Common PHARB | |||
| Hedeoma pulegioides (L.) Pers. American Pennyroyal | Native Historic CNH | |||
| Lamium amplexicaule L. Common Henbit County Record (GP #16-17) | Introduced Common PHARB | |||
| Lamium galeobdolon (L.) L. Yellow Henbit County Record (GP #20-26) | Introduced Rare PHARB | |||
| Lamium purpureum L. Red Henbit County Record (GP #16-08) | Introduced Common PHARB | |||
| Leonurus cardiaca L. Motherwort | Introduced Occasional PHARB | |||
| Leonurus marrubiastrum L. Horehound-motherwort | Introduced Historic | |||
| Lycopus americanus Muhl. ex W. Barton American Water Horehound | Native Common PHARB | |||
| Lycopus amplectens Raf. Sessile or Pondshore Horehound Previously historic, re-established in 2020 (GP #20-225) | Native, Watch List Rare PHARB | |||
| Lycopus rubellus Moench Stalked Water Horehound | Native, Endangered Unknown | |||
| Lycopus sherardii Steele Water Horehound | Native Uncommon PHARB | |||
| Lycopus uniflorus Michaux Northern or Tuberous Horehound | Native Common PHARB | |||
| Lycopus virginicus L. Virginia Horehound | Native Common PHARB | |||
| Marrubium vulgare L. Horehound | Introduced Historic PHARB | |||
| Melissa officinalis L. Lemon Balm County Record (GP #20-207) | Introduced Rare PHARB | |||
| Mentha ×gracilis Sole [Mentha gentilis auct. non L.] Spotted or Downy Whorled Mint | Introduced Rare | |||
| Mentha ×piperita L. [Mentha aquatica × M. spicata] Peppermint | Introduced Historic | |||
| Mentha ×rotundifolia (L.) Huds. Round-leaved Mint | Introduced Unknown | |||
| Mentha ×villosa Hudson [Mentha spicata × M. suaveolens] Wooly Mint | Introduced Rare PHARB | |||
| Mentha aquatica var. aquatica L. Water Mint | Introduced Historic | |||
| Mentha arvensis ssp. parietariaefolia (Becker) Briq. Field Mint | Introduced Historic CNH | |||
| Mentha spicata ssp. spicata L. [Mentha longifolia sensu auct.] Spearmint | Introduced Occasional PHARB | |||
| Nepeta cataria L. Catnip | Introduced Historic CNH | |||
| Origanum vulgare L. Wild Marjoram | Introduced Rare PHARB | |||
| Physostegia virginiana ssp. virginiana (L.) Bentham [Physostegia virginiana var. speciosa (Sweet) A.] False Dragonhead, Obedience | Introduced Unknown | |||
| Prunella laciniata (L.) L. Cut-leaved Heal-all | Introduced Historic CNH | |||
| Prunella vulgaris ssp. lanceolata (W. Barton) Hultén [Prunella vulgaris var. elongata Bentham] American Heal-all, Self-heal | Native Common PHARB | |||
| Prunella vulgaris ssp. vulgaris L. Eurasian Heal-all, Self-heal | Introduced Uncommon PHARB | |||
| Pycnanthemum incanum var. incanum (L.) Michaux Hoary Mountain Mint | Native Historic CNH | |||
| Pycnanthemum muticum (Michaux) Pers. Short-toothed Mountain Mint | Native Occasional PHARB | |||
| Pycnanthemum tenuifolium Schrader Slender-leaved Mountain Mint | Native Uncommon PHARB | |||
| Pycnanthemum verticillatum (Michx.) Pers. Whorled Mountain Mint County Record (ET #19-62) | Native Rare PHARB | |||
| Salvia pratensis L. Meadow Clary or Meadow Sage | Introduced Historic CNH | |||
| Scutellaria galericulata L. [Scutellaria epilobiifolia Hamilton] Marsh or Common Skullcap | Native Uncommon PHARB | |||
| Scutellaria lateriflora L. Mad Dog Skullcap | Native Uncommon PHARB | |||
| Scutellaria parvula var. missouriensis (Epling) Fern. Small or Leonard's Skullcap | Introduced Unknown | |||
| Teucrium canadense var. canadense L. [Teucrium canadense var. virginicum (L.) Eaton] Saltmarsh or American Germander, Wood Sage | Native Common PHARB | |||
| Thymus pulegioides L. [Thymus serpyllum ssp. chamaedrys (Fries) Voll.] Lemon Thyme Country Record (GP 2014) | Introduced Rare PHARB | |||
| Trichostema dichotomum L. Blue Curls | Native Occasional PHARB | |||
Phrymaceae | ||||
| Mimulus ringens L. Blue, Allegheny or Longstalk Monkey-flower | Native Historic CNH | |||
| Phryma leptostachya L. Lopseed | Native Rare PHARB | |||
Orobanchaceae | ||||
| Agalinis acuta Pennell [Gerardia acuta (Pennell) Pennell] Sandplain Gerardia, Agalinis | Native, Endangered Rare PHARB | |||
| Agalinis maritima ssp. maritima (Raf.) Raf. [Gerardia maritima Raf.] Seaside Gerardia, Saltmarsh Agalinis | Native Uncommon PHARB | |||
| Agalinis paupercula (Gray) Britt. [Agalinis purpurea var. parviflora (Benth.) Boivin] Small-flowered Gerardia | Native Rare PHARB | |||
| Agalinis purpurea (L.) Pennell [Gerardia purpurea var. parviflora Bentham] Purple Gerardia, Smooth Agalinis | Native Occasional PHARB | |||
| Aureolaria flava var. flava (L.) Farw. Smooth False Foxglove | Native Unknown | |||
| Aureolaria pedicularia var. intercedens (Pennell) Pennel Fernleaf Yellow False Foxglove | Native Rare PHARB | |||
| Aureolaria virginica (L.) Pennell [Gerardia virginica (L.) B.S.P.] Downy False Foxglove | Native Rare PHARB | |||
| Epifagus virginiana (L.) W. Bart. Beechdrops | Native Occasional PHARB | |||
| Melampyrum lineare Desr. [Melampyrum lineare var. latifolium Barton] Common Cow Wheat | Native Common PHARB | |||
| Orobanche uniflora L. One-flowered Cancer | Native Uncommon PHARB | |||
| Pedicularis canadensis L. Wood Betony, Forest Lousewort | Native Historic CNH | |||
| Schwalbea americana L. Chaffseed | Native, Endangered Historic CNH | |||
Aquifoliaceae | ||||
| Ilex crenata Japanese Holly County Record (GP #17-41) | Introduced Occasional PHARB | |||
| Ilex glabra (L.) A. Gray Inkberry | Native Occasional PHARB | |||
| Ilex opaca var. opaca Aiton Holly or American Holly | Native Common PHARB | |||
| Ilex verticillata (L.) A. Gray [Ilex verticillata var. tenuifolia (Torrey) Wats.] Winterberry, Black Alder | Native Common PHARB | |||
Campanulaceae | ||||
| Campanula alliariifolia Willd. Cornish Bellflower County Record (GP #16-138) | Introduced Waif PHARB | |||
| Campanula aparinoides Pursh [Campanula uliginosa Rydb.] Marsh Bellflower | Native Historic CNH | |||
| Campanula rapunculoides L. Creeping Bellflower County record (GP #17-62) | Introduced Uncommon PHARB | |||
| Jasione montana L. Sheepbit County Record (EL 2014) | Introduced Occasional PHARB | |||
| Lobelia cardinalis L. Cardinal Flower | Native Occasional PHARB | |||
| Lobelia dortmanna L. Water Lobelia | Native Historic CNH | |||
| Lobelia siphilitica L. Blue Lobelia County Record (GP #20-215) | Introduced Rare PHARB | |||
| Lobelia spicata var. spicata Lam. Spiked Lobelia | Native Historic CNH | |||
| Triodanis perfoliata (L.) Nieuwl. [Specularia perfoliata (L.) A. DC.] Venus's Looking-glass | Native Occasional PHARB | |||
Menyanthaceae | ||||
| Menyanthes trifoliata L. [Menyanthes trifoliata var. minor Raf.] Buckbean, Bogbean Only known county occurrence is from the Elizabeth Islands | Native Historic CNH | |||
| Nymphoides cordata (Ell.) Fern. Floating Heart Previously historic, re-established in 2009 (MDC,TB) | Native Rare PHARB | |||
Asteraceae | ||||
| Achillea millefolium ssp. lanulosa (Nutt.) Piper [Achillea millefolium var. occidentalis DC.] Seaside Yarrow | Native, Watch List Abundant PHARB | |||
| Achillea millefolium ssp. millefolium L. Yarrow | Introduced Unknown PHARB | |||
| Ageratina altissima (L.) King & H.E. Robins. [Eupatorium rugosum Houtt.] White Snakeroot | Introduced Unknown | |||
| Ageratina aromatica (L.) Spach [Eupatorium aromaticum L.] Lesser Snakeroot, Aromatic Boneset | Native, Endangered Unknown | |||
| Ambrosia artemisiifolia L. [Ambrosia artemisiifolia var. elatior (L.) Descourtils] Ragweed | Native Abundant PHARB | |||
| Ambrosia psilostachya DC. [Ambrosia coronopifolia Torrey & A. Gray] Western Ragweed | Introduced Historic CNH | |||
| Anaphalis margaritacea (L.) Bentham & Hooker f. [Gnaphalium margaritaceum L.] Pearly Everlasting | Native Common PHARB | |||
| Antennaria howellii ssp. neodioica (Greene) Bayer [Antennaria neodioica var. chlorophylla Fern.] Greene's Pussytoes | Native Historic CNH | |||
| Antennaria neglecta Greene Pussytoes | Native Rare PHARB | |||
| Antennaria parlinii ssp. fallax (Greene) Bayer & Stebbins Parlin's Pussytoes County Record (GP #20-70) | Native Rare PHARB | |||
| Antennaria plantaginifolia (L.) Richardson Plantain-leaved Pussytoes | Native Occasional PHARB | |||
| Anthemis arvensis L. Corn Chamomile County Record (GP#16-90) | Introduced Rare PHARB | |||
| Anthemis cotula L. Stinking Chamomile | Introduced Historic CNH | |||
| Arctium minus Bernh. Burdock | Introduced Occasional PHARB | |||
| Artemisia campestris ssp. caudata (Michaux) Hall & Clements Seaside Wormwood | Native Occasional PHARB | |||
| Artemisia pontica L. Roman Wormwood | Introduced Historic | |||
| Artemisia stelleriana Besser Dusty Miller, Beach Wormwood | Introduced Common PHARB | |||
| Artemisia vulgaris L. Common Mugwort County Record (GP 2010) | Introduced Occasional PHARB | |||
| Baccharis halimifolia L. Groundsel Tree, Sea Myrtle | Native Common PHARB | |||
| Balsamita major Desf. Costmary | Introduced Unknown | |||
| Bellis perennis L. Lawn-daisy | Introduced Occasional | |||
| Bidens connata Muhl. ex Willd. Sticktights | Native Common PHARB | |||
| Bidens discoidea (Torrey & A. Gray) Britton Buttonbush Beggar-ticks | Native Historic CNH | |||
| Bidens frondosa L. Beggar-ticks, Sticktights | Native Common PHARB | |||
| Bidens tripartita L. Three-lobed Beggar-ticks Observed by MacKeever (notes) 1959, Squibnocket | Native Historic | |||
| Boltonia asteroides (L.) L'Hér. White Doll's-daisy County Record (GP #19-255) | Introduced Rare PHARB | |||
| Centaurea ×moncktonii C. E. Britton Protean Knapweed County Record (GP #19-266) | Introduced Rare PHARB | |||
| Centaurea nigra L. [Centaurea nigra var. radiata DC.] Black Knapweed | Introduced Historic CNH | |||
| Centaurea nigrescens Willd. [Centaurea vochinensis Bernh. ex Reichenb.] Knapweed | Introduced Historic CNH | |||
| Centaurea stoebe ssp. micranthos (Gugler) Hayek [Centaurea biebersteinii DC.] Bushy Knapweed | Introduced Abundant PHARB | |||
| Cichorium intybus L. Chicory | Introduced Common PHARB | |||
| Cirsium arvense (L.) Scop. [Cirsium arvense var. integrifolium Wimmer & Grab] Canada Thistle | Introduced Rare PHARB | |||
| Cirsium discolor (Muhl. ex Willd.) Sprengel Field Thistle | Native Uncommon PHARB | |||
| Cirsium horridulum var. horridulum Michaux Yellow Thistle | Native, Watch List Common PHARB | |||
| Cirsium muticum Michaux Swamp Thistle | Native Rare PHARB | |||
| Cirsium pumilum var. pumilum (Nutt.) Sprengel Pasture Thistle | Native Uncommon PHARB | |||
| Cirsium vulgare (Savi) Tenore Common Thistle | Introduced Common PHARB | |||
| Coreopsis lanceolata L. Coreopsis | Introduced Historic PHARB | |||
| Coreopsis rosea Nutt. Pink Tickseed, Pink Coreopsis | Native, Watch List Uncommon PHARB | |||
| Coreopsis tinctoria Nutt. Plains or Gardens Tickseed | Introduced Historic CNH | |||
| Cosmos sulphureus Cav. Sulphur Cosmos | Introduced Rare PHARB | |||
| Crepis capillaris (L.) Wallr. Smooth Hawk's Beard | Introduced Historic CNH | |||
| Doellingeria umbellata (P. Mill.) Nees [Aster umbellatus P. Mill.] Tall Flat-topped White Aster | Native Occasional PHARB | |||
| Echinacea pallida (Nutt.) Nutt. Prairie Coneflower | Introduced Rare CNH | |||
| Erechtites hieraciifolius var. hieraciifolius (L.) Raf. ex DC. Pilewort | Native Common PHARB | |||
| Erechtites hieraciifolius var. megalocarpus (Fern.) Cronq. [Erechtites megalocarpus Fern.] Seaside Pilewort | Native, Watch List Historic | |||
| Erigeron annuus (L.) Pers. Daisy Fleabane | Native Common PHARB | |||
| Erigeron canadensis L. [Conyza canadensis (L.) Cronq.] Horseweed | Native Abundant PHARB | |||
| Erigeron philadelphicus L. Philadelphia Fleabane County Record (GP #19-24) | Native Rare PHARB | |||
| Erigeron pulchellus Michaux Robin's Plantain | Native Rare PHARB | |||
| Erigeron strigosus var. strigosus Muhl. ex Willd. [Erigeron strigosus var. beyrichii (Fischer C. Meyer) Torrey] Rough Fleabane | Native Common PHARB | |||
| Eupatorium cannabinum L. Hemp-agrimony County Record (GP #19-108) | Introduced Rare PHARB | |||
| Eupatorium hyssopifolium L. [Eupatorium hyssopifolium var. calcaratum Fern. & Schub.] Hyssop-leaved Boneset | Native Common PHARB | |||
| Eupatorium perfoliatum L. Boneset | Native Common PHARB | |||
| Eupatorium pilosum Walter [Eupatorium rotundifolium var. saundersii (Porter) Cronq.] Rough or Verbena Boneset | Native Occasional PHARB | |||
| Eupatorium serotinum Michx. Late Thoroughwort County Record (GP #19-206) | Introduced Rare PHARB | |||
| Eurybia divaricatus (L.) Nesom [Aster divaricatus (Nutt.) Torrey & A. Gray] White Wood Aster | Native Abundant PHARB | |||
| Eurybia radula (Ait.) Nesom [Aster radula Ait.] Rough Aster | Native, Watch List Historic | |||
| Eurybia spectabilis (Ait.) Nesom [Aster spectabilis Aiton] Showy Aster | Native Occasional PHARB | |||
| Euthamia caroliniana (L.) Greene ex Porter & Britt. [Euthamia tenuifolia (Pursh) Nutt.] Coastal Plain Flat-top Goldenrod | Native Common PHARB | |||
| Euthamia graminifolia (L.) Nutt. [Solidago graminifolia (L.) Salisb.] Grass-leaf or Flat-top Goldenrod | Native Abundant PHARB | |||
| Eutrochium dubium (Willd. ex Poir.) E.E. Lamont [Eupatorium dubium Willd. ex Poiret] Atlantic Joe Pye Weed | Native Common PHARB | |||
| Eutrochium fistulosum (Barratt) E.E. Lamont [Eupatorium fistulosum Barratt] Trumpetweed | Native Rare PHARB | |||
| Eutrochium maculatum var. maculatum (L.) E.E. Lamont [Eupatorium maculatum L.] Mottled Joe Pye Weed | Native Unknown | |||
| Galinsoga parviflora Cav. Quickweed County Record (GP #16-95) | Introduced Uncommon PHARB | |||
| Galinsoga quadriradiata Ruiz & Pavón [Galinsoga bicolorata St. John & White] Hairy Quickweed | Introduced Occasional PHARB | |||
| Gamochaeta purpurea (L.) Cabrera Purple Cudweed | Native, Endangered Historic CNH | |||
| Gnaphalium uliginosum L. Low Cudweed | Native Rare PHARB | |||
| Helenium flexuosum Raf. [Helenium nudiflorum Nutt.] Purple-headed Sneezeweed | Introduced Historic CNH | |||
| Helianthus annuus L. Common Sunflower Only known county occurrence is from the Elizabeth Islands | Introduced Historic CNH | |||
| Helianthus divaricatus L. Woodland Sunflower | Native Historic PHARB | |||
| Helianthus strumosus L. Rough-leaved Woodland Sunflower | Native Historic CNH | |||
| Hieracium ×marianum Willd. Maryland Hawkweed | Native Historic | |||
| Hieracium aurantiacum L. Orange Hawkweed Observed by B. Sorrie (notes) 1980, Gay Head Cemetery. | Introduced Historic | |||
| Hieracium caespitosum Dumort. [Hieracium pratense Tausch] Meadow or Field Hawkweed | Introduced Occasional PHARB | |||
| Hieracium flagellare Willd. [Pilosella flagellaris (Willd.) P.D. Sell & C. West] Whip Hawkweed | Introduced Rare PHARB | |||
| Hieracium gronovii L. Hairy Hawkweed | Native Occasional PHARB | |||
| Hieracium lachenalii K.C. Gmelin European Hawkweed | Introduced Unknown | |||
| Hieracium paniculatum L. Woodland Hawkweed Only known county occurrence is from the Elizabeth Islands | Native Historic CNH | |||
| Hieracium pilosella L. Mouse-ear Hawkweed | Introduced Common | |||
| Hieracium piloselloides Vill. [Hieracium florentinum All.] Smooth Hawkweed | Introduced Historic CNH | |||
| Hieracium sabaudum Michx. Savoy hawkweed County Record (GP #17-117) | Introduced Occasional PHARB | |||
| Hieracium scabrum Michaux Rough Hawkweed | Native Rare PHARB | |||
| Hieracium umbellatum L. Narrow-leaved Hawkweed | Native Historic CNH | |||
| Hieracium venosum L. [Hieracium venosum var. nudicaule (Michaux) Farw.] Rattlesnake Weed, Poor Robin's Plantain | Native Common PHARB | |||
| Hypochaeris radicata L. Spotted Cat's Ear | Introduced Abundant PHARB | |||
| Inula helenium L. Elecampane | Introduced Historic CNH | |||
| Ionactis linariifolius (L.) Greene [Aster linariifolius L.] Stiff or Spruce Aster | Native Common PHARB | |||
| Iva frutescens (Bartlett) R.C. Jackson [Iva frutescens ssp. oraria (Bartlett) Jackson] Saltmash Elder, Hightide Bush | Native Common PHARB | |||
| Krigia virginica (L.) Willd. Dwarf Dandelion | Native Occasional PHARB | |||
| Kuhnia eupatorioides L. False Boneset | Introduced Unknown | |||
| Lactuca biennis (Moench) Fern. Blue Wild Lettuce | Native Common PHARB | |||
| Lactuca canadensis L. [Lactuca canadensis var. latifolia Kuntze] Yellow Wild Lettuce | Native Common PHARB | |||
| Lactuca hirsuta Muhl. ex Nutt. [Lactuca hirsuta var. sanguinea (Bigelow)] Hairy Wild Lettuce | Native, Watch List Historic PHARB | |||
| Lactuca sativa L. Garden lettuce | Introduced Historic, Waif | |||
| Lactuca serriola L. Prickly Lettuce | Introduced Rare PHARB | |||
| Lapsana communis L. Common Nipplewort County Record (GP #17-89) | Introduced Occasional PHARB | |||
| Leontodon saxatilis ssp. saxatilis Lam. [Leontodon taraxacoides (Vill.) Mérat] von Leysser's Fall Dandelion Previously historic, re-established in 2016 (GP #16-171) | Introduced Rare CNH | |||
| Leucanthemum vulgare Lam. [Chrysanthemum leucanthemum L.] Oxeye Daisy | Introduced Common PHARB | |||
| Liatris novae-angliae var. novae-angliae (Lunell) Shinners [Liatris borealis Nutt.] New England Blazing Star | Native, Special Concern Rare PHARB | |||
| Matricaria discoidea DC. [Matricaria matricarioides auct. non Less. Porter] Pineapple Weed | Introduced Occasional PHARB | |||
| Mikania scandens (L.) Willd. Climbing Hempweed | Native Uncommon PHARB | |||
| Nabalus serpentarius (Pursh) Hook. [Prenanthes serpentaria Pursh] Lion's Foot | Native, Endangered Rare CNH | |||
| Nabalus trifoliolatus Cass. [Prenanthes trifoliolata (Cass.) Fern.] Fall Rattlesnake Root | Native Common PHARB | |||
| Oclemena acuminata (Michx.) Nesom [Aster acuminatus Michaux] Sharp-leaved Aster | Native Historic CNH | |||
| Oclemena nemoralis (Ait.) Greene [Aster nemoralis Aiton] Bog Aster | Native Historic PHARB | |||
| Packera aurea (L.) A. & D. Löve [Senecio aureus L.] Golden Ragwort | Native Rare PHARB | |||
| Pityopsis falcata (Pursh) Nutt. [Chrysopsis falcata (Pursh) Ell.] Sickle-leaved Golden Aster | Native Common PHARB | |||
| Pluchea odorata var. succulenta (Fern.) Cronq. [Pluchea purpurascens var. succulenta Fern.] Saltmarsh Fleabane | Native Common PHARB | |||
| Pseudognaphalium obtusifolium (L.) Hilliard & Burtt [Gnaphalium obtusifolium L.] Sweet Everlasting | Native Common PHARB | |||
| Rudbeckia hirta var. pulcherrima Farw. [Rudbeckia serotina Nutt.] Black-eyed Susan | Introduced Occasional PHARB | |||
| Rudbeckia triloba L. Thin-leaved Cone Flower Observed by MacKeever (notes) 1960, Edgartown | Introduced Historic | |||
| Scorzoneroides autumnalis ssp. autumnalis (L.) Moench [Leontodon autumnalis L.] Fall Dandelion, Hawkbit | Introduced Rare PHARB | |||
| Senecio vulgaris L. Common Groundsel County Record (GP,TB 2012) | Introduced Uncommon PHARB | |||
| Sericocarpus asteroides (L.) B.S.P. [Aster paternus Cronq.] Toothed White-topped Aster | Native Common PHARB | |||
| Sericocarpus linifolius (L.) B.S.P. [Aster solidagineus Michaux] Narrow-leaved White-topped Aster | Native Occasional PHARB | |||
| Solidago ×asperula Desf. [Solidago rugosa × S. sempervirens] Hybrid Goldenrod | Native Historic | |||
| Solidago aestivalis Bicknell [Solidago rugosa var. sphagnophila Graves] Sphagnum Goldenrod | Native Historic CNH | |||
| Solidago altissima ssp. altissima L. [Solidago canadensis var. scabra Torrey & A.] Tall Goldenrod | Native Occasional PHARB | |||
| Solidago arguta var. arguta Aiton Toothed Goldenrod | Native Historic | |||
| Solidago bicolor L. Silverrod | Native Occasional PHARB | |||
| Solidago caesia L. Axillary Goldenrod | Native Occasional PHARB | |||
| Solidago erecta Pursh Slender Goldenrod | Native Historic | |||
| Solidago gigantea Aiton [Solidago gigantea var. serotina (Kuntze) Cronq.] Late Goldenrod | Native Rare PHARB | |||
| Solidago juncea Aiton Early Goldenrod | Native Common PHARB | |||
| Solidago latissimifolia P. Miller . [Solidago elliottii var. ascendens Torrey & A. Gray] Coastal Goldenrod | Native Common PHARB | |||
| Solidago nemoralis ssp. nemoralis Aiton Field Goldenrod | Native Common PHARB | |||
| Solidago odora ssp. odora Aiton Sweet Goldenrod | Native Common PHARB | |||
| Solidago puberula var. puberula Nutt. Downy Goldenrod | Native Common PHARB | |||
| Solidago rugosa ssp. aspera (Aiton) Cronq. [Solidago aspera Aiton] Rough-stemmed Goldenrod | Native Common PHARB | |||
| Solidago rugosa ssp. rugosa P. Miller Rough-stemmed Goldenrod | Native Common PHARB | |||
| Solidago sempervirens var. sempervirens L. Seaside Goldenrod | Native Common PHARB | |||
| Solidago uliginosa Nutt. [Solidago uliginosa var. linoides (Tor. & Gray) Fern.] Swamp Goldenrod | Native Historic CNH | |||
| Solidago ulmifolia var. ulmifolia Muhl. ex Willd. Elm-leaved Goldenrod | Native Historic CNH | |||
| Sonchus arvensis var. arvensis L. Field or Sow Thistle | Introduced Historic CNH | |||
| Sonchus asper (L.) Hill Spiny Sow Thistle | Introduced Common PHARB | |||
| Sonchus oleraceus L. Annual Sow Thistle | Introduced Rare PHARB | |||
| Symphyotrichum concolor ssp. concolor (L.) Nesom [Aster concolor L.] Eastern Silvery Aster | Native, Endangered Historic CNH | |||
| Symphyotrichum cordifolium (L.) Nesom [Aster cordifolius L.] Blue Heart-leaved Aster | Native Rare PHARB | |||
| Symphyotrichum dumosum (L.) Nesom [Aster dumosus var. coridifolius (Michaux) Torrey & Gray] Bushy, Long-stalked or Rice-button Aster | Native Common PHARB | |||
| Symphyotrichum ericoides var. ericoides (L.) Nesom [Aster ericoides L.] Heath White Aster | Native Common PHARB | |||
| Symphyotrichum lanceolatum ssp. lanceolatum (Willd.) Nesom [Aster lanceolatus Willd.] Panicled Aster County Record (GP #18-166) | Native Rare PHARB | |||
| Symphyotrichum lanceolatum var. latifolium (Semple & Chmielewski) G.L. Nesom Panicled Aster County Record (GP #21-167) | Native Rare PHARB | |||
| Symphyotrichum lateriflorum (L.) A. & D. Löve [Aster lateriflorus (L.) Britton] Calico or Goblet Aster | Native Common PHARB | |||
| Symphyotrichum novae-angliae (L.) Nesom [Aster novae-angliae L.] New England Aster | Native Rare PHARB | |||
| Symphyotrichum novi-belgii var. elodes (Torr. & Gray) Nesom [Aster elodes Torr. & Gray] New York American-aster County Record (TB, MDC #2129) | Native Uncommon PHARB | |||
| Symphyotrichum novi-belgii var. novi-belgii (L.) Nesom [Aster novi-belgii L.] New York American-aster | Native Common PHARB | |||
| Symphyotrichum patens var. patens (Ait.) Nesom [Aster patens var. patens Aiton] Late Purple American-aster | Native Occasional PHARB | |||
| Symphyotrichum pilosum var. pilosum (Willd.) Nesom [Aster pilosus Willd.] Awl American-aster County Record (TB, EH 2013) | Native Occasional PHARB | |||
| Symphyotrichum pilosum var. pringlei (A. Gray) Nesom [Aster pilosus var. pringlei (A. Gray) Blake] Pringle's Aster | Native Uncommon PHARB | |||
| Symphyotrichum puniceum var. puniceum (L.) A. & D. Löve [Aster puniceus var. puniceus L.] Purple-stemmed Aster | Native Historic | |||
| Symphyotrichum racemosum (Ell.) Nesom [Aster fragilis auct. non Willd.] Small White Aster | Native Uncommon PHARB | |||
| Symphyotrichum subulatum var. subulatum (Michaux) Nesom [Aster subulatus var. subulatus Michaux] Small- flowered or Annual Saltmarsh Aster | Native Occasional PHARB | |||
| Symphyotrichum tenuifolium var. tenuifolium (L.) Nesom [Aster tenuifolius L.] Large-flowered or Saltmarsh Aster | Native Common PHARB | |||
| Symphyotrichum undulatum (L.) Nesom [Aster undulatus L.] Wavy-leaved or Clasping Heart-leaf Aster | Native Common PHARB | |||
| Tanacetum parthenium (L.) Schultz-Bip. [Chrysanthemum parthenium (L.) Bernh.] Feverfew Observed by MacKeever (notes) 1958, Katama | Introduced Historic | |||
| Tanacetum vulgare L. [Chrysanthemum uliginosum Pers.] Tansy | Introduced Common PHARB | |||
| Taraxacum laevigatum (Willd.) DC. [Taraxacum erythrospermum Andrz. ex Besser] Red-seeded Dandelion | Introduced Common PHARB | |||
| Taraxacum officinale G.H. Weber ex Wiggers Dandelion | Introduced Common PHARB | |||
| Tragapogon pratensis L. Yellow Goat's Beard | Introduced Historic | |||
| Tragopogon dubius Scop. [Tragopogon major Jacq.] Thick-stemmed Goat's Beard | Introduced Historic CNH | |||
| Tussilago farfara L. Colt's-foot County Record (GP 2014) | Introduced Uncommon PHARB | |||
| Xanthium strumarium var. canadense (P. Miller) Torrey & A. Gray [Xanthium echinatum Murray] Cocklebur | Native Common PHARB | |||
Araliaceae | ||||
| Aralia elata (Miq.) Seem. Japanese Angelica-tree County Record (GP #17-86) | Introduced Rare PHARB | |||
| Aralia nudicaulis L. Wild Sarsaparilla | Native Abundant PHARB | |||
| Hedera helix L. English Ivy | Introduced Occasional PHARB | |||
Apiaceae | ||||
| Aegopodium podagraria L. Bishop's Goutweed County Record (GP#17-26) | Introduced, Invasive Rare PHARB | |||
| Angelica lucida L. [Coelopleurum lucidum (L.) Fern.] Seaside Angelica | Native, Watch List Unknown PHARB | |||
| Carum carvi L. Caraway County Record (GP #17-115) | Introduced Rare PHARB | |||
| Cicuta bulbifera L. Bulblet Water Hemlock | Native Uncommon PHARB | |||
| Cicuta maculata var. maculata L. Water Hemlock Previously historic, re-established in 2016 (GP #16-124) | Native Uncommon PHARB | |||
| Conium maculatum L. Poison Hemlock | Introduced Rare PHARB | |||
| Coriandrum sativum L. Coriander Previously historic, re-established in 2019 (GP #19-49) | Introduced Rare PHARB | |||
| Daucus carota L. Queen Anne's Lace | Introduced Abundant PHARB | |||
| Foeniculum vulgare P. Miller Fennel | Introduced Historic | |||
| Heracleum mantegazzianum Sommier & Levier Giant Cow-parsnip County Record (EL 2011) | Introduced Rare PHARB | |||
| Heracleum maximum Bartram [Heracleum lanatum Michaux] Cow-parsnip | Native Common PHARB | |||
| Hydrocotyle americana L. Swamp or Woodland Pennywort | Native Uncommon PHARB | |||
| Hydrocotyle umbellata L. Water or Pondshore Pennywort | Native Common PHARB | |||
| Hydrocotyle verticillata Thunb. [Hydrocotyle verticillata var. triradiata (A. Richard) Fern.] Saltpond Pennywort | Native, Threatened Rare PHARB | |||
| Kalopanax septemlobus (Thunb.) Koidz. [Kalopanax pictus (Thunb.) Nakai] Castor Aralia County Record (GP #17-85) | Introduced Rare PHARB | |||
| Ligusticum scoticum ssp. scoticum L. [Ligusticum scothicum L.] Scotch or Sea Lovage | Native Rare PHARB | |||
| Myrrhis odorata (L.) Scop. Sweet Cicely | Introduced Rare PHARB | |||
| Pimpinella saxifraga ssp. saxifraga L. Burnet-saxifrage | Introduced Rare PHARB | |||
| Ptilimnium capillaceum (Michaux) Raf. Mock Bishop's Weed | Native Occasional PHARB | |||
| Sanicula canadensis var. canadensis L. Canadian Sanicle | Native, Threatened Uncommon PHARB | |||
| Sanicula marilandica L. Black Snakeroot | Native Historic CNH | |||
| Sium suave Walter Water Parsnip | Native Occasional PHARB | |||
| Torilis japonica (Houtt.) DC. Erect Hedge-parsley County Record (GP #16-129) | Introduced Rare PHARB | |||
Adoxaceae | ||||
| Sambucus nigra ssp. canadensis (L.) R. Bolli [Sambucus canadensis L.] Black Elderberry | Native Common PHARB | |||
| Viburnum dentatum var. lucidum Aiton [Viburnum recognitum Fern.] Northern or Smooth Arrowwood | Native Abundant PHARB | |||
| Viburnum dentatum var. venosum (Britton) Gleason Southern Arrowwood | Native Occasional PHARB | |||
| Viburnum dilatatum Thunb. Linden Arrowwood County Record (TB, KF 2011) | Introduced Rare PHARB | |||
| Viburnum nudum var. cassinoides (L.) Torr. & Gray [Viburnum cassinoides L.] Witherod, Wild Raisin | Native Rare PHARB | |||
Caprifoliaceae | ||||
| Knautia arvensis (L.) Coulter Blue Buttons or Caps | Introduced Unknown | |||
| Lonicera × bella Zabel Bell's Honeysuckle County Record (GP #20-38) | Introduced Rare PHARB | |||
| Lonicera × purpusi Rehder Winter Beauty Honeysuckle State Record (GP #20-14) | Introduced Rare PHARB | |||
| Lonicera japonica Thunb. Japanese Honeysuckle | Introduced, Invasive Common PHARB | |||
| Lonicera morrowii A. Gray Morrow Honeysuckle | Introduced, Invasive Common PHARB | |||
| Symphoricarpos albus ssp. laevigatus (Fern.) Hultén Snowberry | Introduced Historic, Waif | |||
| Symphoricarpos orbiculatus Moench. Coralberry | Introduced Historic | |||
| Triosteum perfoliatum L. Perfoliate Horse Gentian | Native, Endangered Rare PHARB | |||
| Valerianella locusta (L.) Lat. European Corn-salad State Record (GP #20-36) | Introduced Rare PHARB | |||
| Weigela floribunda (Siebold & Zucc.) K.Koch Crimson Weigela County record (GP #19-36) | Introduced Waif PHARB | |||