# Flora of New York/Protected species index

| Flora of New York — Genus index | Flora of New York — Genus index | Flora of New York — Genus index | Flora of New York — Genus index |
| Table of contents | Genus index | Protected species index | Invasive species index |
The following list is based on Regulations Ch. 2, Part 193.3, Protected Native Plants from the New York State Department of Environmental Conservation.
| Endangered Species | Common Name | Order | Family | Subfamily | Tribe | Subtribe | # |
| Acalypha virginica | Virginia three-seed mercury | Euphorbiales | Euphorbiaceae | Acalyphoideae | Acalypheae | | 1 |
| Aconitum noveboracense | Northern monkshood | Ranunculales | Ranunculaceae | Ranunculoideae | Aconiteae | | 1 |
| Actaea pachypoda | White baneberry | Ranunculales | Ranunculaceae | Ranunculoideae | Actaeeae | | 4 |
| Actaea rubra | Red baneberry | Ranunculales | Ranunculaceae | Ranunculoideae | Actaeeae | | 4 |
| Adiantum pedatum | Maidenhair fern | Polypodiales | Pteridaceae | Vittarioideae | | | 4 |
| Adoxa moschatellina | Musk root | Dipsacales | Adoxaceae | Adoxoideae | | | 1 |
| Agalinis acuta | Sandplain Gerardia | Lamiales | Orobanchaceae | Rhinanthoideae | Gerardieae | | 1 |
| Agalinis fasciculata | Fascicled False Foxglove | Lamiales | Orobanchaceae | Rhinanthoideae | Gerardieae | | 3 |
| Agalinis maritima  var. maritima | Seaside Gerardia | Lamiales | Orobanchaceae | Rhinanthoideae | Gerardieae | | 2 |
| Agalinis paupercula  var. borealis | Northern False Foxglove | Lamiales | Orobanchaceae | Rhinanthoideae | Gerardieae | | 3 |
| Agastache nepetoides | Yellow Giant-hyssop | Lamiales | Lamiaceae | Nepetoideae | Mentheae | Neptinae | 2 |
| Ageratina aromatica  var. aromatica | Small White Snakeroot | Asterales | Asteraceae | Asteroideae | Eupatorieae | Oxylobinae | 1 |
| Agrimonia parviflora | Swamp Agrimony | Rosales | Rosaceae | Rosoideae | Agrimonieae | Agrimoniineae | 3 |
| Agrimonia rostellata | Woodland Agrimony | Rosales | Rosaceae | Rosoideae | Agrimonieae | Agrimoniineae | 2 |
| Agrostis mertensii | Northern Bentgrass | Poales | Poaceae | Pooideae | Poeae | Agrostidinae | 2 |
| Aletris farinosa | Stargrass | Nartheciales | Nartheciaceae | | | | 2 |
| Alisma gramineum | Water-plantain | Alismatales | Alismataceae | | | | 2 |
| Allium cernuum  var. cernuum | Nodding Wild Onion | Iridales | Alliaceae | Allioideae | | | 2 |
| Allium tricoccum  var. burdickii | Burdick's Wild Leek | Iridales | Alliaceae | Allioideae | | | 1 |
| Amaranthus pumilus | Seabeach Amaranth | Caryophyllales | Amaranthaceae | Amaranthoideae | | | 2 |
| Amelanchier nantucketensis | Nantucket Juneberry | Rosales | Rosaceae | Maloideae | Maleae | | 1 |
| Ammophila breviligulata  ssp. champlainensis | Champlain Beachgrass | Poales | Poaceae | Pooideae | Poeae | Agrostidinae | 1 |
| Amphicarpum purshii | Peanut Grass | Poales | Poaceae | Panicoideae | Paniceae | Paspalinae | 1 |
| Angelica lucida | Seacoast Angelica | Apiales | Apiaceae | Apioideae | Selineae | | 2 |
| Angelica venenosa | Hairy Angelica | Apiales | Apiaceae | Apioideae | Selineae | | 3 |
| Anthoxanthum monticola  ssp. monticola | Alpine Sweetgrass | Poales | Poaceae | Pooideae | Poeae | Phalaridinae | 1 |
| Anticlea elegans  ssp. glaucus | Mountain Death Camas | Liliales | Melanthiaceae | | Melanthieae | | 2 |
| Aplectrum hyemale | Puttyroot | Orchidales | Orchidaceae | Epidendroideae | Maxillarieae | | 1 |
| Arethusa bulbosa | Dragon's Mouth Orchid | Orchidales | Orchidaceae | Epidendroideae | Arethuseae | | 2 |
| Argentina egedii  ssp. egedii | Coastal Silverweed | Rosales | Rosaceae | Rosoideae | Potentilleae | Potentillineae | 2 |
| Arisaema dracontium | Green Dragon | Alismatales | Araceae | Aroideae | Arisaemateae | | 4 |
| Arnica lanceolata  ssp. lanceolata | Lanceleaf Arnica | Asterales | Asteraceae | Asteroideae | Madieae | Arnicinae | 1 |
| Arnoglossum atriplicifolium | Pale Indian-plantain | Asterales | Asteraceae | Asteroideae | Senecioneae | Tussilagininae | 1 |
| Asclepias purpurascens | Purple Milkweed | Gentianales | Apocynaceae | Asclepiadoideae | Asclepiadeae | Asclepiadinae | 2 |
| Asclepias tuberosa  ssp. interior | Butterfly-weed | Gentianales | Apocynaceae | Asclepiadoideae | Asclepiadeae | Asclepiadinae | 4 |
| Asclepias variegata | White Milkweed | Gentianales | Apocynaceae | Asclepiadoideae | Asclepiadeae | Asclepiadinae | 1 |
| Asclepias verticillata | Whorled Milkweed | Gentianales | Apocynaceae | Asclepiadoideae | Asclepiadeae | Asclepiadinae | 3 |
| Asclepias viridiflora | Green Milkweed | Gentianales | Apocynaceae | Asclepiadoideae | Asclepiadeae | Asclepiadinae | 2 |
| Asimina triloba | Pawpaw | Magnoliales | Annonaceae | Annonoideae | Uvarieae | | 2 |
| Asplenium bradleyi | Bradley's Spleenwort | Polypodiales | Aspleniaceae | | | | 1 |
| Asplenium montanum | Mountain Spleenwort | Polypodiales | Aspleniaceae | | | | 2 |
| Asplenium platyneuron  var. platyneuron | Ebony Spleenwort | Polypodiales | Aspleniaceae | | | | 4 |
| Asplenium rhizophyllum | Walking Fern | Polypodiales | Aspleniaceae | | | | 4 |
| Asplenium ruta-muraria | Wall-rue Spleenwort | Polypodiales | Aspleniaceae | | | | 4 |
| Asplenium scolopendrium  var. americanum | Hart's-tongue Fern | Polypodiales | Aspleniaceae | | | | 2 |
| Asplenium trichomanes  ssp. quadrivalens | Maidenhair Spleenwort | Polypodiales | Aspleniaceae | | | | 4 |
| Asplenium trichomanes  ssp. trichomanes | Maidenhair Spleenwort | Polypodiales | Aspleniaceae | | | | 4 |
| Asplenium viride ~ A. trichomanes-ramosum | Green Spleenwort | Polypodiales | Aspleniaceae | | | | 1 |
| Astragalus neglectus | Cooper's Milkvetch | Fabales | Fabaceae | Faboideae | Galegeae | | 1 |
| Athyrium filix-femina  ssp. angustum | Lady Fern | Polypodiales | Athyriaceae | | | | 4 |
| Athyrium filix-femina  ssp. asplenioides | Lady Fern | Polypodiales | Athyriaceae | | | | 4 |
| Atriplex dioica | Thickleaf Orach | Caryophyllales | Chenopodiaceae | Chenopodioideae | Chenopodieae | | 1 |
| Atriplex glabriuscula | Seaside Orach | Caryophyllales | Chenopodiaceae | Chenopodioideae | Chenopodieae | | 1 |
| Azolla caroliniana | Mosquito-fern | Salviniales | Salviniaceae | | | | 4 |
| Bartonia paniculata  ssp. paniculata | Screw-stem | Gentianales | Gentianaceae | | Gentianeae | | 1 |
| Betula glandulosa | Tundra Dwarf Birch | Juglandales | Betulaceae | Betuloideae | | | 1 |
| Betula minor | Dwarf White Birch | Juglandales | Betulaceae | Betuloideae | | | 1 |
| Betula nigra | River Birch | Juglandales | Betulaceae | Betuloideae | | | 3 |
| Betula pumila | Swamp Birch | Juglandales | Betulaceae | Betuloideae | | | 2 |
| Bidens bidentoides | Delmarva Beggar-ticks | Asterales | Asteraceae | Asteroideae | Coreopsideae | Coreopsidinae | 3 |
| Bidens hyperborea  var. hyperborea | Estuary Beggar-ticks | Asterales | Asteraceae | Asteroideae | Coreopsideae | Coreopsidinae | 1 |
| Bidens laevis | Smooth Bur-marigold | Asterales | Asteraceae | Asteroideae | Coreopsideae | Coreopsidinae | 2 |
| Blephilia ciliata | Downy Wood-mint | Lamiales | Lamiaceae | Nepetoideae | Mentheae | Menthinae | 1 |
| Boechera dentata | Toothed Rock-cress | Capparales | Brassicaceae | | Boechereae | | 2 |
| Boechera grahamii | Purple Rock-cress | Capparales | Brassicaceae | | Boechereae | | 2 |
| Boechera missouriensis | Green Rock-cress | Capparales | Brassicaceae | | Boechereae | | 2 |
| Boechera stricta | Drummond's Rock-cress | Capparales | Brassicaceae | | Boechereae | | 2 |
| Bolboschoenus maritimus  ssp. paludosus | Seaside Bulrush | Juncales | Cyperaceae | Cyperoideae | Fuireneae | | 2 |
| Bolboschoenus novae-angliae | Saltmarsh Bulrush | Juncales | Cyperaceae | Cyperoideae | Fuireneae | | 1 |
| Botrychium campestre | Prairie Dunewort | Ophioglossales | Ophioglossaceae | | | | 1 |
| Botrychium dissectum | Cut-leaf Grape Fern | Ophioglossales | Ophioglossaceae | | | | 4 |
| Botrychium lanceolatum  ssp. angustisegmentum | Lance-leaf Grape Fern | Ophioglossales | Ophioglossaceae | | | | 4 |
| Botrychium lunaria | Common Moonwort | Ophioglossales | Ophioglossaceae | | | | 1 |
| Botrychium matricariifolium | Matricary Grape Fern | Ophioglossales | Ophioglossaceae | | | | 4 |
| Botrychium minganense | Mingan Moonwort | Ophioglossales | Ophioglossaceae | | | | 1 |
| Botrychium multifidum | Leathery Grape Fern | Ophioglossales | Ophioglossaceae | | | | 4 |
| Botrychium oneidense | Blunt-lobe Grape Fern | Ophioglossales | Ophioglossaceae | | | | 2 |
| Botrychium rugulosum | Rugulose grape-fern | Ophioglossales | Ophioglossaceae | | | | 1 |
| Botrychium simplex | Least Moonwort | Ophioglossales | Ophioglossaceae | | | | 4 |
| Botrychium virginianum | Rattlesnake Fern | Ophioglossales | Ophioglossaceae | | | | 4 |
| Bouteloua curtipendula  var. curtipendula | Side-oats Grama | Poales | Poaceae | Chloridoideae | Cynodonteae | Boutelouinae | 1 |
| Bromus nottowayanus | Nottoway Brome Grass | Poales | Poaceae | Pooideae | Hordeeae | Bromineae | 1 |
| Buchnera americana | Blue-hearts | Lamiales | Orobanchaceae | Rhinanthoideae | Buchnereae | | 1 |
| Calamagrostis perplexa | Wood Reedgrass | Poales | Poaceae | Pooideae | Poeae | Agrostidinae | 1 |
| Calamagrostis pickeringii | Pickering's Reedgrass | Poales | Poaceae | Pooideae | Poeae | Agrostidinae | 3 |
| Calamagrostis porteri  ssp. porteri | Porter's Reedgrass | Poales | Poaceae | Pooideae | Poeae | Agrostidinae | 1 |
| Calamagrostis stricta  ssp. inexpansa | New England Northern Reedgrass | Poales | Poaceae | Pooideae | Poeae | Agrostidinae | 2 |
| Calamagrostis stricta  ssp. stricta | Northern Reedgrass | Poales | Poaceae | Pooideae | Poeae | Agrostidinae | 1 |
| Callitriche hermaphroditica | Autumnal Water-starwort | Lamiales | Plantaginaceae | | Callitricheae | | 1 |
| Callitriche terrestris | Terrestrial Starwort | Lamiales | Plantaginaceae | | Callitricheae | | 2 |
| Calopogon tuberosus  var. tuberosus | Grass Pink | Orchidales | Orchidaceae | Epidendroideae | Arethuseae | | 4 |
| Calypso bulbosa | Fairy Slipper | Orchidales | Orchidaceae | Epidendroideae | Calypsoeae | | 1 |
| Campanula rotundifolia | Harebell | Asterales | Campanulaceae | Campanuloideae | | | 4 |
| Campanulastrum americanum | Tall Bellflower | Asterales | Campanulaceae | Campanuloideae | | | 1 |
| Cardamine douglassii | Purple Cress | Capparales | Brassicaceae | | Cardamineae | | 2 |
| Cardamine longii | Long's Bittercress | Capparales | Brassicaceae | | Cardamineae | | 2 |
| Cardamine rotundifolia | Mountain Watercress | Capparales | Brassicaceae | | Cardamineae | | 1 |
| Carex abscondita | Thicket Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex aggregata | Glomerate Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex albicans  var. emmonsii | Emmons' Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 3 |
| Carex amphibola | Narrow-leaved Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex arcta | Northern Clustered Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex atherodes | Awned Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 3 |
| Carex atratiformis | Scabrous Black Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex backii | Back's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex barrattii | Barratt's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex bicknellii | Bicknell's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 3 |
| Carex bigelowii | Bigelow's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex bullata | Button Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex bushii | Bush's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 3 |
| Carex buxbaumii | Brown Bog Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex capillaris | Hair-like Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex careyana | Carey's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex caroliniana | Carolina sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex chordorrhiza | Creeping Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex collinsii | Collins' Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex conjuncta | Soft Fox Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex crawei | Crawe's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex cryptolepis | Northeastern Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 3 |
| Carex cumulata | Clustered Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex davisii | Davis' Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex debilis  var. debilis | White-edge Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex decomposita | Cypress-knee Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex echinoides | Bristly Nodding Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex emoryi | Emory's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex formosa | Handsome Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex frankii | Frank's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex garberi | Elk Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex glaucodea | Glaucous Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex gynocrates | Northern Bog Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex haydenii | Cloud Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex hormathodes | Marsh Straw Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex houghtoniana | Houghton's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex jamesii | James' Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex livida | Livid Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex lupuliformis | False Hop Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex meadii | Mead's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex merritt-fernaldii | Fernald's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex mesochorea | Midland Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex mitchelliana | Mitchell's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex molesta | Troublesome Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex muehlenbergii  var. enervis | Muhlenberg's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 3 |
| Carex nigra | Black Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex nigromarginata | Black-edge Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex oligosperma | Few-seed Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 3 |
| Carex retroflexa | Reflexed Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex reznicekii | Reznicek's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex sartwellii | Sartwell's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex schweinitzii | Schweinitz' Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 2 |
| Carex scirpoidea  ssp. scirpoidea | Canadian Single-spike Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex shortiana | Short's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex straminea | Straw Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex striata  var. brevis | Walter's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 3 |
| Carex striatula | Lined Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex styloflexa | Bent Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex sychnocephala | Many-head Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex tenuiflora | Sparse-flowered Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex tincta | Tinged Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex typhina | Cat-tail Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex vaginata | Sheathed Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex venusta | Dark-green Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex wiegandii | Wiegand's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 1 |
| Carex willdenowii | Willdenow's Sedge | Juncales | Cyperaceae | Cyperoideae | Cariceae | | 3 |
| Carya laciniosa | Big Shellbark Hickory | Juglandales | Juglandaceae | Juglandoideae | Caryeae | | 2 |
| Castilleja coccinea | Scarlet Indian-paintbrush | Lamiales | Orobanchaceae | Rhinanthoideae | Castillejeae | | 1 |
| Ceanothus herbaceus | Prairie Redroot | Rhamnales | Rhamnaceae | Ziziphoideae | Pomaderreae | | 1 |
| Celastrus scandens | American Bittersweet | Celastrales | Celastraceae | Celastroideae | | | 3 |
| Cenchrus tribuloides | Dune Sandspur | Poales | Poaceae | Panicoideae | Paniceae | Cenchrinae | 2 |
| Ceratophyllum echinatum | Prickly Hornwort | Ceratophyllales | Ceratophyllaceae | | | | 3 |
| Chaerophyllum procumbens | Spreading Chervil | Apiales | Apiaceae | Apioideae | Scandiceae | Scandicinae | 1 |
| Chamaecyparis thyoides | Atlantic White Cedar | Pinales | Cupressaceae | Cupressoideae | | | 2 |
| Chamaelirium luteum | Fairy Wand | Liliales | Melanthiaceae | | Chionographideae | | 1 |
| Chasmanthium laxum | Slender Spikegrass | Poales | Poaceae | Panicoideae | Centotheceae | | 1 |
| Cheilanthes lanosa | Wooly Lip-fern | Polypodiales | Pteridaceae | Cheilanthoideae | | | 1 |
| Chelone glabra | Turtle-heads | Lamiales | Plantaginaceae | | Cheloneae | | 4 |
| Chenopodium berlandieri  var. macrocalycium | Large-calyx Goosefoot | Caryophyllales | Chenopodiaceae | Chenopodioideae | Chenopodieae | | 1 |
| Chenopodium rubrum ~ Oxybasis rubra | Red Pigweed | Caryophyllales | Chenopodiaceae | Chenopodioideae | Chenopodieae | | 2 |
| Chimaphila maculata | Spotted Wintergreen | Ericales | Ericaceae | Monotropoideae | Pyroleae | | 4 |
| Chimaphila umbellata  ssp. cisatlantica | Pipsissewa | Ericales | Ericaceae | Monotropoideae | Pyroleae | | 4 |
| Clintonia umbellulata | Speckled Woodlily | Liliales | Liliaceae | Medeoloideae | | | 3 |
| Coeloglossum viride | Long-bracted Orchid | Orchidales | Orchidaceae | Orchidoideae | Orchideae | | 4 |
| Collinsia verna | Blue-eyed-Mary | Lamiales | Plantaginaceae | | Cheloneae | | 1 |
| Conopholis americana | Squawroot | Lamiales | Orobanchaceae | Orobanchoideae | Orobancheae | | 4 |
| Corallorhiza maculate  var. maculata | Spotted Coralroot | Orchidales | Orchidaceae | Epidendroideae | Maxillarieae | | 4 |
| Corallorhiza odontorhiza  var. odontorhiza | Autumn Coralroot | Orchidales | Orchidaceae | Epidendroideae | Maxillarieae | | 4 |
| Corallorhiza odontorhiza  var. pringlei | Autumn Coralroot | Orchidales | Orchidaceae | Epidendroideae | Maxillarieae | | 4 |
| Corallorhiza striata  var. striata | Striped Coralroot | Orchidales | Orchidaceae | Epidendroideae | Maxillarieae | | 1 |
| Corema conradii | Broom Crowberry | Ericales | Ericaceae | Empetroideae | Empetreae | | 1 |
| Coreopsis rosea | Rose Coreopsis | Asterales | Asteraceae | Asteroideae | Coreopsideae | Coreopsidinae | 3 |
| Cornus drummondii | Rough-leaf Dogwood | Cornales | Cornaceae | Cornoideae | | | 1 |
| Cornus florida | Flowering Dogwood | Cornales | Cornaceae | Cornoideae | | | 4 |
| Corydalis aurea | Golden Corydalis | Ranunculales | Papaveraceae | Fumarioideae | Corydaleae | | 2 |
| Corydalis flavula | Yellow Harlequin | Ranunculales | Papaveraceae | Fumarioideae | Corydaleae | | 3 |
| Crassula aquatica | Water Pigmyweed | Saxifragales | Crassulaceae | Crassuloideae | | | 1 |
| Crataegus berberifolia | Barberry-leaved Hawthorn | Rosales | Rosaceae | Maloideae | Maleae | | 1 |
| Crataegus mollis | Downy Hawthorn | Rosales | Rosaceae | Maloideae | Maleae | | 1 |
| Crataegus uniflora | Dwarf Hawthorn | Rosales | Rosaceae | Maloideae | Maleae | | 1 |
| Crocanthemum dumosum | Bushy Rockrose | Malvales | Cistaceae | | | | 2 |
| Crocanthemum propinquum | Early Frostweed | Malvales | Cistaceae | | | | 2 |
| Crotalaria sagittalis | Rattlebox | Fabales | Fabaceae | Faboideae | Crotalarieae | | 1 |
| Cryptogramma stelleri | Slender Cliff Brake | Polypodiales | Pteridaceae | Cryptogrammoideae | | | 4 |
| Cuscuta campestris | Field Dodder | Solanales | Convolvulaceae | Cuscutoideae | | | 1 |
| Cuscuta cephalanthi | Button-bush Dodder | Solanales | Convolvulaceae | Cuscutoideae | | | 1 |
| Cuscuta compacta | Sessile Dodder | Solanales | Convolvulaceae | Cuscutoideae | | | 3 |
| Cuscuta obtusiflora  var. glandulosa | Southern Dodder | Solanales | Convolvulaceae | Cuscutoideae | | | 1 |
| Cuscuta pentagona | Five-angled Field-dodder | Solanales | Convolvulaceae | Cuscutoideae | | | 3 |
| Cuscuta polygonorum | Smartweed Dodder | Solanales | Convolvulaceae | Cuscutoideae | | | 1 |
| Cynoglossum virginianum  var. boreale | Northern Wild Comfrey | Boraginales | Boraginaceae | Boraginoideae | Cynoglosseae | | 1 |
| Cynoglossum virginianum  var. virginianum | Wild Comfrey | Boraginales | Boraginaceae | Boraginoideae | Cynoglosseae | | 1 |
| Cyperus echinatus | Globose Flatsedge | Juncales | Cyperaceae | Cyperoideae | Cypereae | | 1 |
| Cyperus erythrorhizos | Red-rooted Flatsedge | Juncales | Cyperaceae | Cyperoideae | Cypereae | | 3 |
| Cyperus flavescens | Yellow Flatsedge | Juncales | Cyperaceae | Cyperoideae | Cypereae | | 1 |
| Cyperus houghtonii | Houghton's Flatsedge | Juncales | Cyperaceae | Cyperoideae | Cypereae | | 3 |
| Cyperus lupulinus  ssp. lupulinus | Hop Sedge | Juncales | Cyperaceae | Cyperoideae | Cypereae | | 2 |
| Cyperus odoratus | Rusty Flatsedge | Juncales | Cyperaceae | Cyperoideae | Cypereae | | 3 |
| Cyperus polystachyos  var. texensis | Coast Flatsedge | Juncales | Cyperaceae | Cyperoideae | Cypereae | | 1 |
| Cyperus retrorsus  var. retrorsus | Retrorse Flatsedge | Juncales | Cyperaceae | Cyperoideae | Cypereae | | 1 |
| Cyperus schweinitzii | Schweinitz's Flatsedge | Juncales | Cyperaceae | Cyperoideae | Cypereae | | 3 |
| Cypripedium acaule | Pink Ladyslipper | Orchidales | Orchidaceae | Cypripedioideae | | | 4 |
| Cypripedium arietinum | Ram's-head Ladyslipper | Orchidales | Orchidaceae | Cypripedioideae | | | 2 |
| Cypripedium candidum | Small White Ladyslipper | Orchidales | Orchidaceae | Cypripedioideae | | | 1 |
| Cypripedium parviflorium  var. makasin | Small Yellow Ladyslipper | Orchidales | Orchidaceae | Cypripedioideae | | | 4 |
| Cypripedium parviflorium  var. parviflorium | Small Yellow Ladyslipper | Orchidales | Orchidaceae | Cypripedioideae | | | 4 |
| Cypripedium parviflorium  var. pubescens | Yellow Ladyslipper | Orchidales | Orchidaceae | Cypripedioideae | | | 4 |
| Cypripedium parviflorum  var. parviflorum | Small Yellow Ladyslipper | Orchidales | Orchidaceae | Cypripedioideae | | | 1 |
| Cypripedium reginae | Showy Ladyslipper | Orchidales | Orchidaceae | Cypripedioideae | | | 4 |
| Cystopteris bulbifera | Bulblet Fern | Polypodiales | Cystopteridaceae | | | | 4 |
| Cystopteris fragilis | Common Fragile Fern | Polypodiales | Cystopteridaceae | | | | 4 |
| Cystopteris protrusa | Lowland Fragile Fern | Polypodiales | Cystopteridaceae | | | | 1 |
| Cystopteris tenuis | Fragile Fern | Polypodiales | Cystopteridaceae | | | | 4 |
| Dendrolycopodium dendroideum | Northern Tree Clubmoss | | | | | | 4 |
| Dendrolycopodium obscurum | Ground Pine | | | | | | 4 |
| Deparia acrostichoides | Silvery Spleenwort | | | | | | 4 |
| Descurainia pinnata  ssp. brachycarpa | Northern Tansy-mustard | | | | | | 1 |
| Desmodium ciliare | Little-leaf Tick-trefoil | | | | | | 2 |
| Desmodium humifusum | Spreading Tick-clover | | | | | | 1 |
| Desmodium laevigatum | Smooth Tick-clover | | | | | | 1 |
| Desmodium nuttallii | Nuttall's Tick-clover | | | | | | 1 |
| Desmodium obtusum | Beggar-lice | | | | | | 1 |
| Desmodium pauciflorum | Small-flowered Tick-clover | | | | | | 1 |
| Diapensia lapponica  var. lapponica | Diapensia | | | | | | 2 |
| Diarrhena obovata | Beakgrass | | | | | | 2 |
| Dichanthelium leibergii | Leiberg's Panic Grass | | | | | | 1 |
| Dichanthelium oligosanthes  var. oligosanthes | Few-flowered Panic Grass | | | | | | 1 |
| Dichanthelium scabriusculum | Panic Grass | | | | | | 1 |
| Dichanthelium scoparium | Velvet Panic Grass | | | | | | 1 |
| Dichanthelium wrightianum | Wright's Panic Grass | | | | | | 1 |
| Digitaria filiformis | Slender Crabgrass | | | | | | 1 |
| Diospyros virginiana | Persimmon | | | | | | 2 |
| Diphasiastrum complanatum | Northern Running-pine | | | | | | 1 |
| Diphasiastrum digitatum | Running-pine | | | | | | 4 |
| Diphasiastrum sitchense | Sitka Clubmoss | | | | | | 1 |
| Diphasiastrum tristachyum | Ground Cedar | | | | | | 4 |
| Diplazium pycnocarpon | Glade Fern | | | | | | 4 |
| Draba arabisans | Rock-cress | | | | | | 2 |
| Draba glabella | Smooth Rock-cress | | | | | | 1 |
| Draba reptans | Carolina Whitlow-grass | | | | | | 2 |
| Dracocephalum parviflorum | American Dragonhead | | | | | | 1 |
| Drosera filiformis | Dew-thread | | | | | | 3 |
| Drosera filiformis | Dewthread | | | | | | 4 |
| Drosera intermedia | Sundew | | | | | | 4 |
| Drosera rotundifolia  var. comosa | Sundew | | | | | | 4 |
| Drosera rotundifolia  var. rotundifolia | Sundew | | | | | | 4 |
| Dryopteris campyloptera | Mountain Wood Fern | | | | | | 4 |
| Dryopteris carthusiana | Spinulose Wood Fern | | | | | | 4 |
| Dryopteris celsa | Log Fern | | | | | | 1 |
| Dryopteris clintoniana | Clinton's Shield Fern | | | | | | 4 |
| Dryopteris cristata | Crested Wood Fern | | | | | | 4 |
| Dryopteris fragrans | Fragrant Cliff Fern | | | | | | 1 |
| Dryopteris goldiana | Giant Wood Fern | | | | | | 4 |
| Dryopteris intermedia  ssp. intermedia | Fancy Fern | | | | | | 4 |
| Dryopteris marginalis | Marginal Wood Fern | | | | | | 4 |
| Elatine americana | American Waterwort | | | | | | 1 |
| Eleocharis aestuum | Tidal Spikerush | | | | | | 1 |
| Eleocharis diandra | Wright's Spikerush | | | | | | 1 |
| Eleocharis engelmannii | Engelmann's Spikerush | | | | | | 1 |
| Eleocharis equisetoides | Knotted Spikerush | | | | | | 2 |
| Eleocharis fallax | Creeping Spikerush | | | | | | 1 |
| Eleocharis melanocarpa | Black-fruited Spikerush | | | | | | 3 |
| Eleocharis ovata | Ovate Spikerush | | | | | | 1 |
| Eleocharis quadrangulata | Angled Spikerush | | | | | | 1 |
| Eleocharis robbinsii | Robbins Spikerush | | | | | | 3 |
| Eleocharis tenuis  var. pseudoptera | Slender Spikerush | | | | | | 1 |
| Eleocharis tricostata | Three-ribbed Spikerush | | | | | | 1 |
| Eleocharis tuberculosa | Long-tubercled Spikerush | | | | | | 2 |
| Eleocharis uniglumis  var. halophila | Salt-marsh Spikerush | | | | | | 2 |
| Elymus glaucus  ssp. glaucus | Blue Wild Rye | | | | | | 1 |
| Empetrum atropurpureum | Purple Crowberry | | | | | | 1 |
| Empetrum nigrum | Black Crowberry | | | | | | 3 |
| Endodeca serpentaria | Virginia Snakeroot | | | | | | 2 |
| Epigaea repens | Trailing Arbutus | | | | | | 4 |
| Epilobium hornemannii  ssp. hornemannii | Alpine Willow-herb | | | | | | 1 |
| Equisetum palustre | Marsh Horsetail | | | | | | 2 |
| Equisetum pratense | Meadow Horsetail | | | | | | 2 |
| Erechtites hieraciifolius  var. megalocarpa | Fireweed | | | | | | 1 |
| Erigenia bulbosa | Harbinger-of-spring | | | | | | 1 |
| Erigeron hyssopifolius | Daisy Fleabane | | | | | | 1 |
| Erigeron philadelphicus  var. provancheri | Provancher's Fleabane | | | | | | 1 |
| Eriophorum angustifolium  ssp. angustifolium | Narrow-leaf Cottongrass | | | | | | 1 |
| Euonymus americanus | American Strawberry-bush | | | | | | 1 |
| Euonymus obovatus | Running Strawberry-bush | | | | | | 4 |
| Eupatorium album  var. subvenosum | White Boneset | | | | | | 2 |
| Eupatorium album  var. album | White Boneset | | Asteraceae | Asteroideae | Eupatorieae | | 1 |
| Eupatorium leucolepis  var. leucolepis | White-bracted Boneset | | Asteraceae | Asteroideae | Eupatorieae | | 1 |
| Eupatorium pubescens | Serrate Round-leaf Boneset | | Asteraceae | Asteroideae | Eupatorieae | | 1 |
| Eupatorium rotundifolium  var. rotundifolium | Round-leaf Boneset | | Asteraceae | Asteroideae | Eupatorieae | | 1 |
| Eupatorium torreyanum | Fringed Boneset | | | | | | 2 |
| Euphorbia ipecacuanhae | American Ipecac | | | | | | 1 |
| Eurybia radula | Swamp Aster | | | | | | 1 |
| Eurybia spectabilis | Showy Aster | | | | | | 2 |
| Festuca saximontana  var. saximontana | Sheep Fescue | | | | | | 1 |
| Fimbristylis castanea | Marsh Fimbry | | | | | | 2 |
| Frasera caroliniensis | Green Gentian | | | | | | 2 |
| Fuirena pumila | Dwarf Umbrella Sedge | | | | | | 3 |
| Galearis spectabilis | Showy Orchis | | | | | | 4 |
| Galium concinnum | Shining Bedstraw | | | | | | 1 |
| Galium kamtschaticum | Northern Wild-licorice | | | | | | 1 |
| Gaylussacia bigeloviana | Dwarf Huckleberry | | | | | | 1 |
| Gentiana andrewsii | Closed Gentian | | | | | | 4 |
| Gentiana clausa | Blind Gentian | | | | | | 4 |
| Gentiana linearis | Closed Gentian | | | | | | 4 |
| Gentiana saponaria | Soapwort Gentian | | | | | | 1 |
| Gentianella quinquefolia  ssp. quinquefolia | Stiff Gentian | | | | | | 4 |
| Gentianopsis crinita | Fringed Gentian | | | | | | 4 |
| Gentianopsis virgata | Lesser Fringed Gentian | | | | | | 1 |
| Geocaulon lividum | Purple Comandra | | | | | | 1 |
| Geum macrophyllum  var. macrophyllum | Bigleaf Yellow Avens | | | | | | 1 |
| Geum triflorum  var. triflorum | Prairie-smoke | | | | | | 2 |
| Geum virginianum | Rough Avens | | | | | | 2 |
| Goodyera pubescens | Downy Rattlesnake-plantain | | | | | | 4 |
| Goodyera repens | Dwarf Rattlesnake-plantain | | | | | | 4 |
| Goodyera tesselata | Rattlesnake Plantain | | | | | | 4 |
| Gymnocarpium dryopteris | Oak Fern | | | | | | 4 |
| Gymnocladus dioicus | Kentucky Coffee Tree | | | | | | 1 |
| Hackelia deflexa  var. americana | Northern Stickseed | | | | | | 1 |
| Halenia deflexa | Spurred Gentian | | | | | | 1 |
| Hasteola suaveolens | Sweet-scented Indian-plantain | | | | | | 1 |
| Hedeoma hispida | Mock-pennyroyal | | | | | | 2 |
| Helianthus angustifolius | Swamp Sunflower | | | | | | 2 |
| Heteranthera reniformis | Kidneyleaf Mud-plantain | | | | | | 3 |
| Heuchera americana  var. americana | American Alumroot | | | | | | 3 |
| Hippuris vulgaris | Common Mare's-tail | | | | | | 1 |
| Hottonia inflata | Featherfoil | | | | | | 2 |
| Houstonia purpurea  var. calycosa | Southern Bluets | | | | | | 1 |
| Houstonia purpurea  var. purpurea | Purple Bluets | | | | | | 1 |
| Huperzia appressa | Appalachian Firmoss | | | | | | 3 |
| Huperzia lucidula | Shining Firmoss | | | | | | 4 |
| Huperzia selago | Fir Clubmoss | | | | | | 1 |
| Hydrangea arborescens | Wild Hydrangea | | | | | | 2 |
| Hydrastis canadensis | Golden-seal | | | | | | 2 |
| Hydrocotyle ranunculoides | Floating Pennywort | | | | | | 1 |
| Hydrocotyle umbellata | Water-pennywort | | | | | | 3 |
| Hydrocotyle verticillata | Whorled-pennywort | | | | | | 1 |
| Hydrophyllum appendiculatum | Appendaged Waterleaf | | | | | | 1 |
| Hylotelephium telephioides | Live-forever | | | | | | 1 |
| Hypericum adpressum | Creeping St. John's-wort | | | | | | 2 |
| Hypericum ascyron | Great St. John's-wort | | | | | | 3 |
| Hypericum densiflorum | Bushy St. John's-wort | | | | | | 1 |
| Hypericum denticulatum | Coppery St. John's-wort | | | | | | 1 |
| Hypericum hypericoides  ssp. multicaule | St. Andrew's Cross | | | | | | 1 |
| Hypericum prolificum | Shrubby St. John's-wort | | | | | | 2 |
| Ilex glabra | Gallberry | | | | | | 4 |
| Ilex laevigata | Smooth Winterberry | | | | | | 4 |
| Ilex montana | Mountain Winterberry | | | | | | 4 |
| Ilex opaca  var. opaca | American Holly | | | | | | 4 |
| Ilex verticillata | Black Alder | | | | | | 4 |
| Ipomoea pandurata | Wild Potato-vine | | | | | | 1 |
| Iris prismatica | Slender Blue Flag | | | | | | 2 |
| Iris virginica  var. shrevei | Southern Blue Flag | | | | | | 1 |
| Isoetes lacustris | Large-spored Quillwort | | | | | | 3 |
| Isoetes riparia | Riverbank Quillwort | | | | | | 1 |
| Isotria medeoloides | Small Whorled Pogonia | | Orchidaceae | | | | 1 |
| Isotria verticillata | Large Whorled Pogonia | | | | | | 4 |
| Jeffersonia diphylla | Twin-leaf | | | | | | 2 |
| Juglans cinerea | Butternut | | | | | | 4 |
| Juncus ambiguus | Doubtful Toad-rush | | | | | | 1 |
| Juncus biflorus | Large Grass-leaved Rush | | | | | | 1 |
| Juncus brachycarpus | Short-fruit Rush | | | | | | 1 |
| Juncus debilis | Weak Rush | | | | | | 1 |
| Juncus ensifolius | Ensiform Rush | | | | | | 1 |
| Juncus scirpoides | Scirpus-like Rush | | | | | | 1 |
| Juncus stygius  ssp. americanus | Moor-rush | | | | | | 1 |
| Juncus subcaudatus | Woods-rush | | | | | | 1 |
| Juncus trifidus | Arctic Rush | | | | | | 2 |
| Juniperus horizontalis | Creeping Juniper | | | | | | 1 |
| Kalmia angustifolia | Sheep Laurel | | | | | | 4 |
| Kalmia latifolia | Mountain Laurel | | | | | | 4 |
| Kalmia polifolia | Bog Laurel | | | | | | 4 |
| Kalmia procumbens | Alpine Azalea | | | | | | 1 |
| Lachnanthes caroliana | Carolina Redroot | | | | | | 1 |
| Lactuca floridana | False Lettuce | | | | | | 1 |
| Lactuca hirsuta | Downy Lettuce | | | | | | 1 |
| Lathyrus ochroleucus | Creamy Wild-pea | | | | | | 3 |
| Lathyrus venosus | Rough Veiny Vetchling | | | | | | 1 |
| Lechea pulchella  var. moniliformis | Bead Pinweed | | | | | | 1 |
| Lechea racemulosa | Illinois Pinweed | | | | | | 3 |
| Lechea tenuifolia | Slender Pinweed | | | | | | 2 |
| Lemna perpusilla | Minute Duckweed | | | | | | 1 |
| Lemna valdiviana | Pale Duckweed | | | | | | 1 |
| Leptochloa fusca  ssp. fascicularis | Salt-meadow Grass | | | | | | 1 |
| Lespedeza angustifolia | Narrow-leaved Bush-clover | | | | | | 2 |
| Lespedeza frutescens | Violet Bush-clover | | | | | | 3 |
| Lespedeza repens | Trailing Bush-clover | | | | | | 3 |
| Lespedeza stuevei | Velvety Bush-clover | | | | | | 2 |
| Liatris cylindracea | Slender Blazing-star | | | | | | 1 |
| Liatris scariosa  var. novae-angliae | Northern Blazing-star | | | | | | 2 |
| Liatris scariosa  var. nieuwlandii | Nieuwland's Blazing-star | | | | | | 1 |
| Ligusticum scothicum  ssp. scothicum | Scotch Lovage | | | | | | 1 |
| Lilaeopsis chinensis | Eastern Grasswort | | | | | | 2 |
| Lilium canadense  ssp. canadense | Canada Lily | | | | | | 4 |
| Lilium canadense  ssp. editorium | Canada Lily | | | | | | 4 |
| Lilium michiganense | Michigan Lily | | | | | | 1 |
| Lilium philadelphicum | Woodlily | | | | | | 4 |
| Lilium superbum | Turk's-cap Lily | | | | | | 4 |
| Limonium carolinianum | Sea Lavender | | | | | | 4 |
| Limosella australis | Mudwort | | | | | | 3 |
| Linum intercursum | Sandplain Wild Flax | | | | | | 2 |
| Linum medium  var. texanum | Southern Yellow Flax | | | | | | 2 |
| Linum striatum | Stiff Yellow Flax | | | | | | 3 |
| Linum sulcatum | Yellow Wild Flax | | | | | | 2 |
| Liparis liliifolia | Large Twayblade | | | | | | 1 |
| Liparis loeselii | Bog Twayblade | | | | | | 4 |
| Lipocarpha micrantha | Dwarf Bulrush | | | | | | 1 |
| Listera auriculata | Auricled Twayblade | | | | | | 1 |
| Listera australis | Southern Twayblade | | | | | | 1 |
| Listera convallarioides | Broad-lipped Twayblade | | | | | | 1 |
| Listera cordata  var. cordata | Heartleaf Twayblade | | | | | | 4 |
| Lithospermum caroliniense  ssp. croceum | Golden Puccoon | | | | | | 1 |
| Littorella uniflora | American Shore-grass | | | | | | 1 |
| Lobelia cardinalis | Cardinal-flower | | | | | | 4 |
| Lobelia dortmanna | Water Lobella | | | | | | 4 |
| Lobelia nuttallii | Nuttall's Lobelia | | | | | | 3 |
| Ludwigia sphaerocarpa | Globe-fruited Ludwigia | | | | | | 2 |
| Lupinus perennis | Wild Lupine | | | | | | 3 |
| Luzula bulbosa | Hairy Woodrush | | | | | | 3 |
| Luzula echinata | Spiny Woodrush | | | | | | 3 |
| Luzula spicata | Spiked Woodrush | | | | | | 1 |
| Lycopodiella alopecuroides | Foxtail Clubmoss | | | | | | 4 |
| Lycopodiella appressa | Swamp Clubmoss | | | | | | 4 |
| Lycopodiella inundata | Northern Bog Clubmoss | | | | | | 4 |
| Lycopodium clavatum | Running Cedar | | | | | | 4 |
| Lycopus amplectens | Water-horehound | | | | | | 2 |
| Lycopus rubellus | Gypsy-wort | | | | | | 1 |
| Lygodium palmatum | Climbing Fern | | Lygodiaceae | | | | 1 |
| Lysimachia hybrida | Lance-leaved Loosestrife | | | | | | 1 |
| Lysimachia quadriflora | Four-flowered Loosestrife | | | | | | 1 |
| Lythrum lineare | Saltmarsh Loosestrife | | | | | | 1 |
| Magnolia virginiana | Sweetbay Magnolia | | | | | | 1 |
| Malaxis bayardii | Bayard's Adder's-mouth Orchid | | | | | | 1 |
| Malaxis monophyllos  var. brachypoda | White Adder's-mouth | | | | | | 4 |
| Malaxis unifolia | Green Adder's-mouth | | | | | | 4 |
| Matteuccia struthiopteris | Ostrich Fern | | | | | | 4 |
| Melanthium virginicum | Virginia Bunchflower | | | | | | 1 |
| Mertensia virginica | Virginia Bluebells | | | | | | 4 |
| Mimulus alatus | Winged Monkeyflower | | | | | | 3 |
| Minuartia caroliniana | Pine-barren Sandwort | | | | | | 3 |
| Minuartia glabra | Appalachian Sandwort | | | | | | 3 |
| Minuartia groenlandica | Mountain Sandwort | | | | | | 3 |
| Monarda clinopodia | Basil-balm | | | | | | 1 |
| Monarda didyma | Bee-balm | | | | | | 4 |
| Myrica caroliniensis | Bayberry | | | | | | 4 |
| Myriophyllum alterniflorum | Water Milfoil | | | | | | 2 |
| Myriophyllum farwellii | Farwell's Water-milfoil | | | | | | 2 |
| Myriophyllum pinnatum | Green Parrot's-feather | | | | | | 1 |
| Najas guadalupensis  ssp. muenscheri | Hudson River Water-nymph | | | | | | 1 |
| Najas guadalupensis  ssp. olivacea | Southern Naiad | | | | | | 1 |
| Najas marina | Holly-leaved Naiad | | | | | | 1 |
| Oclemena nemoralis | Bog Aster | | | | | | 3 |
| Oenothera laciniata | Cut-leaved Evening-primrose | | | | | | 1 |
| Oenothera oakesiana | Oakes' Evening Primrose | | | | | | 2 |
| Oldenlandia uniflora | Clustered Bluets | | | | | | 1 |
| Oligoneuron album | Upland Goldenrod | | | | | | 3 |
| Oligoneuron houghtonii | Houghton's Goldenrod | | | | | | 1 |
| Oligoneuron ohioense | Ohio Goldenrod | | | | | | 2 |
| Oligoneuron rigidum  var. rigidum | Stiff-leaf Goldenrod | | | | | | 2 |
| Omalotheca sylvatica | Woodland Cudweed | | | | | | 1 |
| Onosmodium virginianum | Virginia False Gromwell | | | | | | 1 |
| Ophioglossum pusillum | Adder's-tongue | | | | | | 4 |
| Opuntia humifusa  var. humifusa | Eastern Prickly Pear | | | | | | 4 |
| Orontium aquaticum | Golden Club | | | | | | 2 |
| Osmunda cinnamomea | Cinnamon Fern | | | | | | 4 |
| Osmunda claytoniana | Interrupted Fern | | | | | | 4 |
| Osmunda regalis  ssp. spectabilis | Royal Fern | | | | | | 4 |
| Oxalis violacea | Violet Wood-sorrel | | | | | | 2 |
| Oxypolis rigidior | Stiff Cowbane | | | | | | 1 |
| Panax quinquefolius | Ginseng | | | | | | 4 |
| Panicum amarum | Bitter Panic Grass | | | | | | 3 |
| Panicum flexile | Wiry Panic Grass | | | | | | 3 |
| Panicum rigidulum  var. elongatum | Tall Flat Panic Grass | | | | | | 1 |
| Parnassia glauca | Grass-of-parnassus | | | | | | 4 |
| Paspalum laeve | Field Beadgrass | | | | | | 1 |
| Pedicularis lanceolata | Swamp Lousewort | | | | | | 2 |
| Pellaea atropurpurea | Purple Cliff Brake | | | | | | 4 |
| Pellaea glabella  ssp. glabella | Smooth Cliff Brake | | | | | | 2 |
| Persicaria careyi | Carey's Smartweed | | | | | | 1 |
| Persicaria setacea | Swamp Smartweed | | | | | | 1 |
| Petasites frigidus  var. palmatus | Sweet Coltsfoot | | | | | | 1 |
| Phegopteris connectilis | Northern Beech Fern | | | | | | 4 |
| Phegopteris hexagonoptera | Broad Beech Fern | | | | | | 4 |
| Phlox maculata  ssp. maculata | Wild Sweet-william | | | | | | 1 |
| Phlox pilosa | Downy Phlox | | | | | | 1 |
| Phragmites australis  ssp. americanus | American Phragmites | | | | | | 3 |
| Physalis virginiana | Virginia Ground-cherry | | | | | | 1 |
| Pinguicula vulgaris | Butterwort | | | | | | 2 |
| Pinus banksiana | Jack Pine | | | | | | 3 |
| Pinus echinata | Shortleaf Pine | | | | | | 1 |
| Pinus virginiana | Virginia Pine | | | | | | 1 |
| Piptatherum canadense | Canada Ricegrass | | | | | | 2 |
| Plantago cordata | Heartleaf Plantain | | | | | | 3 |
| Plantago maritima  var. juncoides | Seaside Plantain | | | | | | 2 |
| Platanthera aquilonis | Northern Green Orchid | | | | | | 4 |
| Platanthera blephariglottis  var. blephariglottis | White Fringed Orchid | | | | | | 4 |
| Platanthera ciliaris | Orange Fringed Orchis | | | | | | 1 |
| Platanthera clavellata | Green Wooldland Orchid | | | | | | 4 |
| Platanthera cristata | Crested Fringed Orchis | | | | | | 1 |
| Platanthera dilatata  var. dilatata | Bog-candle | | | | | | 4 |
| Platanthera flava  var. herbiola | Tubercled Orchid | | | | | | 4 |
| Platanthera grandiflora | Large Purple Fringed Orchid | | | | | | 4 |
| Platanthera hookeri | Hooker's Orchid | | | | | | 1 |
| Platanthera lacera | Ragged Fringed Orchid | | | | | | 4 |
| Platanthera leucophaea | Eastern Prairie Fringed Orchid | | | | | | 1 |
| Platanthera obtusata | Blunt-leaved Orchid | | | | | | 4 |
| Platanthera orbiculata | Large Round-leaved Orchid | | | | | | 4 |
| Platanthera psycodes | Small Purple Fringed Orchid | | | | | | 4 |
| Poa cuspidata | Bluegrass | | | | | | 1 |
| Poa glauca  ssp. glauca | White Bluegrass | | | | | | 1 |
| Poa interior | Inland Bluegrass | | | | | | 1 |
| Poa laxa  ssp. fernaldiana | Fernald's Bluegrass | | | | | | 1 |
| Poa paludigena | Slender Marsh Bluegrass | | | | | | 1 |
| Poa sylvestris | Woodland Bluegrass | | | | | | 1 |
| Podostemum ceratophyllum | Riverweed | | | | | | 2 |
| Pogonia ophioglossoides | Rose Pogonia | | | | | | 4 |
| Polemonium vanbruntiae | Jacob's-ladder | | | | | | 3 |
| Polygala cruciata  var. aquilonia | Cross-leaf Milkwort | | | | | | 3 |
| Polygala lutea | Orange Milkwort | | | | | | 1 |
| Polygala nuttallii | Nuttall's Milkwort | | | | | | 2 |
| Polygonum aviculare  ssp. buxiforme | Small's Knotweed | | | | | | 1 |
| Polygonum douglasii | Douglas' Knotweed | | | | | | 2 |
| Polygonum glaucum | Seabeach Knotweed | | | | | | 3 |
| Polygonum tenue | Slender Knotweed | | | | | | 3 |
| Polypodium virginianum | Rock Polypody | | | | | | 4 |
| Polystichum acrostichoides | Christmas Fern | | | | | | 4 |
| Polystichum braunii | Braun's Holly Fern | | | | | | 4 |
| Polystichum lonchitis | Northern Holly-fern | | | | | | 1 |
| Populus heterophylla | Swamp Cottonwood | | | | | | 2 |
| Potamogeton alpinus | Northern Pondweed | | | | | | 2 |
| Potamogeton confervoides | Algae-like Pondweed | | | | | | 3 |
| Potamogeton diversifolius | Water-thread Pondweed | | | | | | 1 |
| Potamogeton hillii | Hill's Pondweed | | | | | | 2 |
| Potamogeton ogdenii | Ogden's Pondweed | | | | | | 1 |
| Potamogeton pulcher | Spotted Pondweed | | | | | | 2 |
| Potamogeton strictifolius | Straight-leaf Pondweed | | | | | | 1 |
| Potentilla paradoxa | Bushy Cinquefoil | | | | | | 1 |
| Prenanthes boottii | Boott's Rattlesnake-root | | | | | | 1 |
| Prenanthes crepidinea | Nodding Rattlesnake-root | | | | | | 1 |
| Primula mistassinica | Bird's-eye Primrose | | | | | | 2 |
| Proserpinaca pectinata | Comb-leaved Mermaid-weed | | | | | | 2 |
| Prunus pumila  var. depressa | Dwarf Sand-cherry | | | | | | 2 |
| Prunus pumila  var. pumila | Low Sand-cherry | | | | | | 1 |
| Pseudognaphalium micradenium | Catfoot | | | | | | 1 |
| Pseudolycopodiella caroliniana | Carolina Clubmoss | | | | | | 1 |
| Ptelea trifoliata  ssp. trifoliata | Wafer-ash | | | | | | 1 |
| Pteridium aquilinum  var. pseudocaudatum | Southeastern Bracken | | Dennstaedtiaceae | | | | 1 |
| Pterospora andromedea | Giant Pine-drops | | | | | | 1 |
| Ptilimnium capillaceum | Mock Bishop's-weed | | | | | | 3 |
| Pycnanthemum clinopodioides | Basil Mountain-mint | | | | | | 1 |
| Pycnanthemum muticum | Blunt Mountain-mint | | | | | | 2 |
| Pycnanthemum torrei | Torrey's Mountain-mint | | | | | | 1 |
| Pycnanthemum verticillatum  var. verticillatum | Whorled Mountain-mint | | | | | | 1 |
| Pyrola asarifolia  ssp. asarifolia | Pink Wintergreen | | | | | | 2 |
| Pyrola minor | Snowline Wintergreen | | | | | | 1 |
| Pyxidanthera barbulata | Flowering Pixiemoss | | | | | | 1 |
| Quercus marilandica  var. marilandica | Blackjack Oak | | | | | | 3 |
| Quercus phellos | Willow Oak | | | | | | 1 |
| Quercus shumardii  var. shumardii | Shumard Oak | | | | | | 1 |
| Ranunculus cymbalaria | Seaside Crowfoot | | | | | | 1 |
| Ranunculus hispidus  var. nitidus | Swamp Buttercup | | | | | | 1 |
| Ranunculus micranthus | Small-flowered Crowfoot | | | | | | 3 |
| Rhodiola integrifolia  ssp. leedyi | Leedy's Roseroot | | | | | | 1 |
| Rhodiola rosea | Roseroot | | | | | | 1 |
| Rhododendron canadense | Rhodora | | | | | | 2 |
| Rhododendron lapponicum  var. lapponicum | Lapland Rosebay | | | | | | 1 |
| Rhododendron maximum | Great Laurel | | | | | | 4 |
| Rhododendron periclymenoides | Pinkster | | | | | | 4 |
| Rhododendron prinophyllum | Early Azalea | | | | | | 4 |
| Rhododendron viscosum | Swamp Azalea | | | | | | 4 |
| Rhynchospora fusca | Sooty Beakrush | | | | | | 3 |
| Rhynchospora inundata | Drowned Beakrush | | | | | | 2 |
| Rhynchospora macrostachya | Tall Beakrush | | | | | | 3 |
| Rhynchospora nitens | Short-beaked Beakrush | | | | | | 2 |
| Rhynchospora pallida | Pale Beakrush | | | | | | 1 |
| Rhynchospora scirpoides | Long-beaked Beakrush | | | | | | 3 |
| Rorippa aquatica | Lake-cress | | | | | | 2 |
| Rosa acicularis  ssp. sayi | Prickly Rose | | | | | | 1 |
| Rotala ramosior | Tooth-cup | | | | | | 2 |
| Rubus cuneifolius | Sand Blackberry | | | | | | 1 |
| Rumex fueginus | Golden Dock | | | | | | 1 |
| Rumex hastatulus | Heart Sorrel | | | | | | 1 |
| Rumex persicarioides | Seaside Dock | | | | | | 1 |
| Sabatia angularis | Rose-pink | | | | | | 1 |
| Sabatia campanulata | Slender Marsh-pink | | | | | | 1 |
| Sabatia stellaris | Sea-pink | | | | | | 2 |
| Sagina decumbens  ssp. decumbens | Small-flowered Pearlwort | | | | | | 1 |
| Sagittaria montevidensis  var. spongiosa | Spongy Arrowhead | | | | | | 2 |
| Sagittaria subulata | Strap-leaf Arrowhead | | | | | | 3 |
| Sagittaria teres | Quill-leaf Arrowhead | | | | | | 1 |
| Salicornia bigelovii | Dwarf Glasswort | | | | | | 2 |
| Salix cordata | Sand Dune Willow | | | | | | 2 |
| Salix herbacea | Dwarf Willow | | | | | | 1 |
| Salix pyrifolia | Balsam Willow | | | | | | 3 |
| Salix uva-ursi | Bearberry Willow | | | | | | 2 |
| Salvia lyrata | Lyre-leaf Sage | | | | | | 1 |
| Salvinia minima | Water-fern | | | | | | 4 |
| Sanguinaria canadensis | Bloodroot | | | | | | 4 |
| Sarracenia purpurea | Pitcher-plant | | | | | | 4 |
| Saxifraga aizoides | Yellow Mountain-saxifrage | | | | | | 2 |
| Saxifraga oppositifolia  ssp. oppositifolia | Purple Mountain-saxifrage | | | | | | 1 |
| Saxifraga paniculata  ssp. neogaea | White Mountain-saxifrage | | | | | | 1 |
| Scheuchzeria palustris | Pod Grass | | | | | | 3 |
| Schizaea pusilla | Curlygrass Fern | | Schizaeaceae | | | | 1 |
| Schoenoplectus heterochaetus | Slender Bulrush | | | | | | 1 |
| Scirpus ancistrochaetus | Northeastern Bulrush | | | | | | 1 |
| Scirpus georgianus | Georgia Bulrush | | | | | | 1 |
| Scleria minor | Slender Nutrush | | | | | | 1 |
| Scleria muehlenbergii | Reticulate Nutrush | | | | | | 1 |
| Scleria pauciflora  var. caroliniana | Few-flowered Nutrush | | | | | | 1 |
| Scleria reticularis | Reticulated Nutrush | | | | | | 3 |
| Scleria triglomerata | Whip Nutrush | | | | | | 1 |
| Scleria verticillata | Low Nutrush | | | | | | 1 |
| Scutellaria incana  var. incana | Hoary Skullcap | | | | | | 1 |
| Scutellaria integrifolia | Hyssop-skullcap | | | | | | 1 |
| Scutellaria parvula  var. parvula | Small Skullcap | | | | | | 3 |
| Selaginella eclipes | Hidden Spike-moss | | | | | | 1 |
| Sericocarpus linifolius | Flax-leaf Whitetop | | | | | | 2 |
| Sesuvium maritimum | Sea Purslane | | | | | | 1 |
| Silene caroliniana  ssp. pensylvanica | Wild Pink | | | | | | 2 |
| Silene caroliniana  ssp. pensylvanica | Wild Pink | | | | | | 4 |
| Sisyrinchium mucronatum | Michaux's Blue-eyed-grass | | | | | | 1 |
| Smallanthus uvedalius | Bear's-foot | | | | | | 1 |
| Smilax pseudochina | False China-root | | | | | | 1 |
| Smilax pulverulenta | Jacob's-ladder | | | | | | 1 |
| Solidago latissimifolia | Coastal Goldenrod | | | | | | 1 |
| Solidago leiocarpa | Alpine Goldenrod | | | | | | 2 |
| Solidago sempervirens  var. mexicana | Seaside Goldenrod | | | | | | 1 |
| Solidago simplex  var. monticola | Rand's Mountain Goldenrod | | | | | | 2 |
| Solidago simplex  var. racemosa | Mountain Goldenrod | | | | | | 1 |
| Sparganium natans | Small Bur-reed | | | | | | 2 |
| Sphenopholis obtusata | Prairie Wedgegrass | | | | | | 1 |
| Sphenopholis pensylvanica | Swamp Oats | | | | | | 1 |
| Spinulum annotinum | Bristly Clubmoss | | | | | | 4 |
| Spinulum canadense | Northern Bristly Club-moss | | | | | | 1 |
| Spiraea septentrionalis | Mountain Meadow-sweet | | | | | | 1 |
| Spiranthes casei  var. casei | Lady's-tresses | | | | | | 4 |
| Spiranthes cernua | Nodding Lady's-tresses | | | | | | 4 |
| Spiranthes lacera  var. lacera | Slender Lady's-tresses | | | | | | 4 |
| Spiranthes lucida | Wide-leaved Lady's-tresses | | | | | | 4 |
| Spiranthes ochroleuca | Creamy Lady's-tresses | | | | | | 4 |
| Spiranthes romanzoffiana | Hooded Lady's-tresses | | | | | | 4 |
| Spiranthes tuberosa | Little Lady's-tresses | | | | | | 4 |
| Spiranthes vernalis | Spring Ladies'-tresses | | | | | | 1 |
| Sporobolus clandestinus | Rough Rush-grass | | | | | | 1 |
| Sporobolus heterolepis | Northern Dropseed | | | | | | 2 |
| Stachys hyssopifolia | Rough Hedge-nettle | | | | | | 2 |
| Stellaria longipes | Longstalk Starwort | | | | | | 2 |
| Strophostyles umbellata | Pink Wild Bean | | | | | | 1 |
| Stuckenia filiformis  ssp. alpina | Slender Pondweed | | | | | | 1 |
| Stuckenia filiformis  ssp. occidentalis | Sheathed Pondweed | | | | | | 1 |
| Suaeda linearis | Narrow-leaf Sea-blite | | | | | | 1 |
| Suaeda rolandii | Roland's Sea-blite | | | | | | 1 |
| Subularia aquatica  var. americana | Water Awlwort | | | | | | 1 |
| Symphyotrichum boreale | Northern Bog Aster | | | | | | 2 |
| Symphyotrichum ciliolatum | Lindley's Aster | | | | | | 1 |
| Symphyotrichum concolor  var. concolor | Silvery Aster | | | | | | 1 |
| Symphyotrichum laeve  var. concinnum | Smooth Blue Aster | | | | | | 1 |
| Symphyotrichum lanceolatum  var. interior | Tall White Aster | | | | | | 1 |
| Symphyotrichum ontarionis | Ontario Aster | | | | | | 3 |
| Symphyotrichum oolentangiense  var. oolentangiense | Sky-blue Aster | | | | | | 1 |
| Symphyotrichum subulatum  var. subulatum | Saltmarsh Aster | | | | | | 2 |
| Symphyotrichum tenuifolium  var. tenuifolium | Slender Saltmarsh Aster | | | | | | 3 |
| Thalictrum venulosum  var. confine | Veiny Meadow-rue | | | | | | 1 |
| Thaspium barbinode | Meadow-parsnip | | | | | | 1 |
| Thelypteris noveboracensis | New York Fern | | | | | | 4 |
| Thelypteris palustris  var. pubescens | Marsh Fern | | | | | | 4 |
| Thelypteris simulata | Massachusetts Fern | | | | | | 4 |
| Tilia american  var. heterophylla | White Basswood | | | | | | 1 |
| Tipularia discolor | Cranefly Orchid | | | | | | 1 |
| Triantha glutinosa | Sticky False Asphodel | | | | | | 1 |
| Trichomanes intricatum | Appalachian Trichomanes | | Hymenophyllaceae | | | | 1 |
| Trichophorum cespitosum  ssp. cespitosum | Deer's Hair Sedge | | | | | | 2 |
| Trichophorum clintonii | Clinton's Clubrush | | | | | | 1 |
| Trichostema brachiatum | False-pennyroyal | | | | | | 3 |
| Trichostema setaceum | Tiny Blue-Curls | | | | | | 1 |
| Triglochin palustre | Marsh Arrow-grass | | | | | | 2 |
| Trillium cernuum | Nodding Trillium | | | | | | 4 |
| Trillium erectum | Purple Trillium | | | | | | 4 |
| Trillium flexipes | Nodding Trillium | | | | | | 1 |
| Trillium grandiflorum | White Trillium | | | | | | 4 |
| Trillium sessile | Toad-shade | | | | | | 1 |
| Trillium undulatum | Painted Trillium | | | | | | 4 |
| Triphora trianthophora | Nodding Pogonia | | | | | | 2 |
| Tripsacum dactyloides | Northern Gamma Grass | | | | | | 2 |
| Trisetum melicoides | Melic-oats | | | | | | 1 |
| Trollius laxus | Spreading Globeflower | | | | | | 3 |
| Ulmus thomasii | Cork Elm | | | | | | 2 |
| Utricularia geminiscapa | Hiddenfruit Bladderwort | | | | | | 3 |
| Utricularia juncea | Rush Bladderwort | | | | | | 1 |
| Utricularia minor | Lesser Bladderwort | | | | | | 3 |
| Utricularia radiata | Small Floating Bladderwort | | | | | | 2 |
| Utricularia striata | Fibrous Bladderwort | | | | | | 2 |
| Utricularia subulata | Zigzag Bladderwort | | | | | | 3 |
| Uvularia puberula | Mountain Bellwort | | | | | | 1 |
| Vaccinium boreale | High-mountain Blueberry | | | | | | 2 |
| Vaccinium cespitosum | Dwarf Blueberry | | | | | | 1 |
| Vaccinium uliginosum | Bog Bilberry | | | | | | 3 |
| Valeriana uliginosa | Marsh Valerian | | | | | | 1 |
| Valerianella chenopodiifolia | Goosefoot Corn-salad | | | | | | 1 |
| Valerianella umbilicata | Navel-fruited Corn-salad | | | | | | 1 |
| Vernonia gigantea  ssp. gigantea | Tall Ironweed | | | | | | 1 |
| Veronica peregrina  ssp. xalapensis | Neckweed | | | | | | 3 |
| Veronicastrum virginicum | Culver's-root | | | | | | 2 |
| Viburnum dentatum  var. venosum | Southern Arrowwood | | | | | | 2 |
| Viburnum edule | Squashberry | | | | | | 2 |
| Viburnum nudum  var. nudum | Possum-haw | | | | | | 1 |
| Viola bicolor | Field Pansy | | | | | | 1 |
| Viola brittoniana | Coast Violet | | | | | | 1 |
| Viola hirsutula | Southern Wood Violet | | | | | | 1 |
| Viola nephrophylla | Northern Bog Violet | | | | | | 1 |
| Viola novae-angliae | New England Violet | | | | | | 1 |
| Viola pedata | Bird's-foot Violet | | | | | | 3 |
| Viola pedata | Bird's-foot Violet | | | | | | 4 |
| Viola primulifolia | Primrose-leaf Violet | | | | | | 2 |
| Vitis vulpina | Winter Grape | | | | | | 1 |
| Vittaria appalachiana | Appalachian Shoestring Fern | | Pteridaceae | | | | 1 |
| Vittaria appalachiana | Grass Fern (also in Engangered list) | | | | | | 4 |
| Woodsia alpina | Alpine Cliff Fern | | Woodsiaceae | | | | 1 |
| Woodsia glabella | Smooth Cliff Fern | | Woodsiaceae | | | | 1 |
| Woodsia ilvensis | Rusty Woodsia | | | | | | 4 |
| Woodsia obtusa  ssp. obtusa | Blunt-lobed Woodsia | | | | | | 4 |
| Woodwardia areolata | Netted Chain Fern | | | | | | 4 |
| Woodwardia virginica | Virginia Chain Fern | | | | | | 4 |
| Xyris smalliana | Large Yellow-eyed-grass | | | | | | 2 |

## Key to # column

1. Endangered native plants - In danger of extirpation throughout all or a significant portion of their ranges within the state and requiring remedial action to prevent such extinction.
* Five or fewer extant sites, or
* Fewer than 1,000 individuals, or
* Restricted to fewer than four U.S.G.S. 7 1/2 minute series maps, or
* Listed as endangered by the United States Department of Interior.
2. Threatened native plants - Likely to become endangered within the foreseeable future throughout all or a significant portion of their ranges within the state.
* Six to fewer than 20 extant sites, or
* 1,000 to fewer than 3,000 individuals, or
* Restricted to not less than four or more than seven U.S.G.S. 7 1/2 minute series maps, or
* Listed as threatened by the United States Department of Interior in the Code of Federal Regulations.
3. Rare native plants
* 20 to 35 extant sites or
* 3,000 to 5,000 individuals statewide.
4. Exploitably vulnerable native plants - Likely to become threatened in the near future throughout all or a significant portion of their ranges within the state if causal factors continue unchecked. Includes plants that are likely to be picked for commercial and personal purposes.