| Acalypha virginica* |
Three-seeded mercury |
SH |
G5 |
PE |
| Adiantum aleuticum |
Aleutian maidenhair fern |
S1 |
G5 |
E |
| Adiantum viridimontanum |
Green Mountain maidenhair fern |
S1 |
G4 |
E |
| Adlumia fungosa |
Allegheny vine |
S1 |
G4 |
E |
| Agalinis maritima |
Saltmarsh false-foxglove |
S3 |
G5 |
SC |
| Agalinis neoscotica |
Nova Scotia false-foxglove |
S1 |
G3 |
T |
| Agalinis purpurea |
Large-purple false-foxglove |
S1 |
G5 |
E |
| Agrostis mertensii |
Boreal bentgrass |
S2 |
G5 |
T |
| Aletris farinosa |
Unicorn root |
S1 |
G5 |
E |
| Allium canadense |
Wild garlic |
S2 |
G5 |
SC |
| Allium tricoccum |
Wild leek |
S3 |
G5 |
SC |
| Amelanchier gaspensis |
Gaspé shadbush |
S2 |
G4 |
SC |
| Amelanchier nantucketensis |
Nantucket shadbush |
S2 |
G3Q |
T |
| Amerorchis rotundifolia |
Small round-leaved orchis |
S2 |
G5 |
T |
| Anemone acutiloba * |
Sharp-lobed hepatica |
SX |
G5T5 |
PE |
| Anemone multifida |
Cut-leaved anemone |
S1 |
G5 |
T |
| Anthoxanthum monticola |
Alpine sweet grass |
S1 |
G5 |
T |
| Arctous alpina |
Alpine bearberry |
S1 |
G5 |
T |
| Arnica lanceolata |
Hairy arnica |
S2 |
G3 |
T |
| Artemisia campestris ssp. canadensis * |
Canadian wormwood |
SH |
G5TNR |
PE |
| Artemisia campestris ssp. caudata |
Beach wormwood |
S1S2 |
G5T5 |
SC |
| Asarum canadense |
Wild ginger |
S1S2 |
G5 |
T |
| Asclepias tuberosa * |
Butterfly weed |
SX |
G5 |
PE |
| Asplenium platyneuron |
Ebony spleenwort |
S2 |
G5 |
SC |
| Asplenium rhizophyllum * |
Walking fern |
SX |
G5 |
PE |
| Asplenium viride |
Green spleenwort |
S1 |
G5 |
E |
| Astragalus alpinus var. brunetianus |
Alpine milk-vetch |
S3 |
G5T3 |
SC |
| Astragalus eucosmus * |
Elegant milk-vetch |
SX |
G5 |
PE |
| Astragalus robbinsii var. minor |
Robbins' milk-vetch |
S1 |
G5T5 |
E |
| Aureolaria pedicularia |
Fern-leaved false foxglove |
S3 |
G5 |
SC |
| Baptisia tinctoria * |
Yellow wild indigo |
SH |
G5 |
PE |
| Barbarea orthoceras * |
American winter-cress |
SH |
G5 |
PE |
| Bartonia paniculata ssp. iodandra |
Screwstem |
S1 |
G5T3T5 |
T |
| Benthamidia florida |
Flowering dogwood |
S1 |
G5 |
E |
| Betula glandulosa |
Tundra dwarf birch |
S1 |
G5 |
E |
| Betula minor |
Dwarf white birch |
S1 |
G4G5Q |
E |
| Betula pumila |
Swamp birch |
S2S3 |
G5 |
SC |
| Bidens eatonii |
Eaton's bur-marigold |
S2 |
G3 |
SC |
| Bidens hyperborea |
Estuary bur-marigold |
S3 |
G4 |
SC |
| Bistorta vivipara |
Alpine bistort |
S1 |
G5 |
E |
| Boechera laevigata |
Smooth rockcress |
S1 |
G5 |
E |
| Boechera missouriensis |
Missouri rockcress |
S1 |
G5 |
T |
| Bolboschoenus novae-angliae |
Marsh bulrush |
S1 |
G3 |
E |
| Bolboschoenus robustus |
Saltmarsh bulrush |
S2 |
G5 |
T |
| Botrychium lunaria |
Moonwort |
S1 |
G5 |
E |
| Botrychium oneidense |
Blunt-lobed grapefern |
SU |
G4 |
T |
| Botrychium pallidum |
Pale moonwort |
S1 |
G3 |
E |
| Bromus kalmii |
Wild chess |
S1 |
G5 |
E |
| Bromus pubescens |
Hairy wood brome-grass |
S2 |
G5 |
SC |
| Calamagrostis cinnoides |
Small reed grass |
S3 |
G5 |
SC |
| Calamagrostis pickeringii |
Pickering's reed grass |
S1 |
G5 |
E |
| Calamagrostis stricta ssp. inexpansa |
Northern reed grass |
S1 |
G5T5 |
E |
| Calamagrostis stricta ssp. stricta |
Neglected reed grass |
S2 |
G5T5 |
T |
| Callitriche terrestris |
Terrestrial water-starwort |
SU |
G5 |
SC |
| Calystegia spithamaea |
Upright bindweed |
S2 |
G4G5 |
T |
| Cardamine bellidifolia * |
Alpine bitter-cress |
SX |
G5 |
PE |
| Cardamine bulbosa * |
Bulbous bitter-cress |
S1 |
G5 |
SC |
| Cardamine concatenata |
Cut-leaved toothwort |
S1 |
G5 |
E |
| Cardamine longii |
Long's bitter-cress |
S2 |
G3? |
T |
| Cardamine maxima |
Large toothwort |
S3 |
G5 |
SC |
| Carex adusta |
Swarthy sedge |
S2 |
G5 |
E |
| Carex alopecoidea * |
Foxtail sedge |
SH |
G5 |
PE |
| Carex atherodes |
Awned sedge |
S1 |
G5 |
T |
| Carex atratiformis |
Black sedge |
S2S3 |
G5 |
SC |
| Carex baileyi * |
Bailey's sedge |
SH |
G4 |
PE |
| Carex bicknellii |
Bicknell's sedge |
S1 |
G5 |
E |
| Carex bigelowii |
Bigelow's sedge |
S2 |
G5 |
SC |
| Carex bullata |
Button sedge |
S2 |
G5 |
SC |
| Carex bushii * |
Bush's sedge |
SX |
G4 |
PE |
| Carex capillaris |
Capillary sedge |
S2 |
G5 |
SC |
| Carex crawei * |
Crawe's sedge |
SX |
G5 |
PE |
| Carex eburnea |
Ebony sedge |
S1 |
G5 |
E |
| Carex garberi |
Garber's sedge |
S2 |
G5 |
SC |
| Carex granularis |
Meadow sedge |
S1 |
G5 |
E |
| Carex gynocrates |
Northern bog sedge |
S2 |
G5 |
SC |
| Carex hirtifolia |
Pubescent sedge |
S2 |
G5 |
SC |
| Carex laevivaginata |
Smooth-sheathed sedge |
S1 |
G5 |
SC |
| Carex laxiculmis |
Spreading sedge |
S2 |
G5 |
E |
| Carex livida |
Livid sedge |
S2 |
G5 |
SC |
| Carex media |
Intermediate sedge |
S1 |
G5T5 |
E |
| Carex muehlenbergii var. muehlenbergii |
Muhlenberg sedge |
S1 |
G5 |
E |
| Carex oronensis |
Orono sedge |
S3 |
G3 |
T |
| Carex polymorpha |
Variable sedge |
S1 |
G3 |
E |
| Carex prairea |
Prairie sedge |
S1 |
G5 |
T |
| Carex praticola * |
Northern meadow sedge |
SX |
G5 |
PE |
| Carex rariflora * |
Loose-flowered sedge |
SH |
G5 |
PE |
| Carex recta * |
Saltmarsh sedge |
SH |
G4G5 |
PE |
| Carex rostrata |
Beaked sedge |
S2 |
G5 |
SC |
| Carex saxatilis |
Russett sedge |
S1 |
G5 |
E |
| Carex scirpoidea |
Bulrush sedge |
S2 |
G5 |
SC |
| Carex siccata |
Dry land sedge |
S2 |
G5 |
SC |
| Carex sparganioides |
Bur-reed sedge |
S1 |
G5 |
E |
| Carex sterilis |
Dioecious sedge |
S3 |
G4G5 |
SC |
| Carex tenuiflora |
Sparse-flowered sedge |
S3 |
G5 |
SC |
| Carex typhina |
Cattail sedge |
S1 |
G5 |
E |
| Carex vacillans |
Brackish sedge |
S2 |
GNR |
E |
| Carex vestita |
Clothed sedge |
S1 |
G5 |
E |
| Carex waponahkikensis |
Dawn-land sedge |
SU |
G5T2T4 |
SC |
| Carya cordiformis |
Bitternut hickory |
S1 |
G5 |
E |
| Castanea dentata |
American chestnut |
S4 |
G3 |
SC |
| Castilleja septentrionalis |
Northern painted cup |
S3 |
G5 |
SC |
| Ceanothus americanus |
New Jersey tea |
S1S2 |
G5 |
T |
| Cenchrus longispinus * |
Long-spined sandbur |
SH |
G5 |
PE |
| Chamaecyparis thyoides |
Atlantic white cedar |
S2 |
G4 |
SC |
| Chenopodium foggii |
Fogg's goosefoot |
S1 |
G2G3 |
E |
| Chenopodium rubrum var. rubrum * |
Coast-blite goosefoot |
SH |
G5 |
PE |
| Chimaphila maculata |
Spotted wintergreen |
S2 |
G5 |
T |
| Cirsium horridulum * |
Yellow thistle |
SH |
G5 |
PE |
| Clematis occidentalis ssp. occidentalis |
Purple clematis |
S3 |
G5T5 |
SC |
| Clethra alnifolia |
Sweet pepper-bush |
S2 |
G5 |
SC |
| Coptidium lapponicum |
Lapland buttercup |
S2 |
G5 |
T |
| Corallorhiza odontorhiza |
Autumn coral-root |
S1 |
G5 |
E |
| Crassula aquatica |
Pygmyweed |
S2S3 |
G5 |
SC |
| Cryptogramma stelleri |
Slender cliffbrake |
S1 |
G5 |
T |
| Cryptotaenia canadensis * |
Wild chervil |
SH |
G5 |
PE |
| Cynoglossum virginianum ssp. boreale |
Northern wild comfrey |
S1 |
G5T4T5 |
E |
| Cyperus erythrorhizos |
Red-root flatsedge |
S1 |
G5 |
E |
| Cyperus houghtonii * |
Houghton's flatsedge |
S1 |
G4? |
E |
| Cyperus squarrosus |
Awned flatsedge |
S2 |
G5 |
SC |
| Cypripedium arietinum |
Ram's-head lady's-slipper |
S1 |
G3 |
E |
| Cypripedium reginae |
Showy lady's-slipper |
S3 |
G4G5 |
SC |
| Descurainia incana * |
Richardson's tansy-mustard |
SH |
G5T5 |
PE |
| Diapensia lapponica |
Lapland diapensia |
S2 |
G5 |
SC |
| Dicentra canadensis |
Squirrel-corn |
S1 |
G5 |
E |
| Diphasiastrum sitchense |
Alaskan clubmoss |
S1 |
G5 |
T |
| Draba arabisans |
Rock whitlow-grass |
S1 |
G4G5 |
T |
| Draba cana |
Lance-leaved draba |
S1 |
G5 |
E |
| Draba glabella |
Smooth draba |
S1 |
G5 |
E |
| Drosera anglica |
English sundew |
S1 |
G5 |
E |
| Drosera linearis |
Slender-leaved sundew |
S1 |
G4G5 |
E |
| Dryopteris filix-mas ssp. brittonii |
Male wood fern |
S1 |
G5T4? |
E |
| Dryopteris fragrans |
Fragrant wood fern |
S3 |
G5 |
SC |
| Dryopteris goldiana |
Goldie's wood fern |
S2 |
G4G5 |
SC |
| Eleocharis aestuum |
Tidal spikerush |
S2 |
G3 |
SC |
| Eleocharis engelmannii * |
Engelmann's spikerush |
SH |
G4G5 |
PE |
| Eleocharis nitida |
Slender spikerush |
SU |
G4 |
SC |
| Eleocharis quinqueflora ssp. fernaldii |
Few-flowered spikerush |
S2 |
G5TNRQ |
SC |
| Eleocharis rostellata |
Beaked spikerush |
S1 |
G5 |
T |
| Eleocharis tuberculosa |
Long-tubercled spikerush |
S1 |
G5 |
E |
| Elymus canadensis * |
Canada Wild Rye |
SH |
G5 |
PE |
| Elymus hystrix |
Bottlebrush grass |
S3 |
G5 |
SC |
| Elymus macgregorii |
MacGregor's wild rye |
S2 |
G5 |
SC |
| Epilobium anagallidifolium |
Alpine willow-herb |
S1 |
G5 |
E |
| Epilobium hornemannii |
Hornemann's willow-herb |
S1 |
G5 |
T |
| Epilobium lactiflorum * |
White-flower willow-herb |
SH |
G5 |
PE |
| Eragrostis capillaris * |
Tiny lovegrass |
SH |
G5 |
PE |
| Eragrostis hypnoides* |
Teal lovegrass |
SH |
G5 |
PE |
| Erigeron acris ssp. kamtschaticus * |
Bitter fleabane |
SH |
G5T5 |
PE |
| Erigeron hyssopifolius |
Hyssop-leaved fleabane |
S2 |
G5 |
SC |
| Eriocaulon parkeri |
Parker's pipewort |
S3 |
G3 |
SC |
| Eupatorium pubescens |
Hairy boneset |
S1 |
G5T5 |
E |
| Eupatorium sessilifolium |
Upland boneset |
S1 |
G5 |
E |
| Euphrasia oakesii |
Oakes' eyebright |
S1 |
G4 |
E |
| Eurybia schreberi * |
Schreber's wood-aster |
SX |
G4 |
PE |
| Euthamia caroliniana |
Narrow-leaved goldenrod |
S2 |
G5 |
T |
| Eutrochium fistulosum |
Hollow joe-pye weed |
S2 |
G5? |
SC |
| Festuca prolifera |
Arctic red fescue |
S1 |
G4G5 |
E |
| Fimbristylis autumnalis |
Fall fimbry |
S2S3 |
G5 |
SC |
| Galearis spectabilis |
Showy orchis |
S1 |
G5 |
E |
| Galium brevipes * |
Limestone swamp bedstraw |
SH |
G4? |
PE |
| Galium kamtschaticum |
Boreal bedstraw |
S2 |
G5 |
SC |
| Galium labradoricum |
Bog bedstraw |
S2 |
G5 |
SC |
| Galium obtusum * |
Blunt-leaved bedstraw |
SX |
G5 |
PE |
| Gamochaeta purpurea * |
Purple cudweed |
SX |
G5 |
PE |
| Gentiana rubricaulis |
Red-stemmed gentian |
S1 |
G4? |
T |
| Gentianella amarella ssp. acuta |
Northern gentian |
S1 |
G5T5 |
E |
| Gentianella quinquefolia * |
Stiff gentian |
SH |
G5 |
PE |
| Geocaulon lividum |
Northern comandra |
S3 |
G5 |
SC |
| Geum fragarioides |
Barren-strawberry |
S1 |
G5 |
E |
| Glyceria acutiflora |
Sharp-scaled manna-grass |
S1 |
G5 |
E |
| Goodyera oblongifolia |
Giant rattlesnake-plantain |
S1 |
G5 |
E |
| Hackelia deflexa ssp. americana |
Northern stickseed |
S1 |
G5T5 |
E |
| Harrimanella hypnoides |
Moss bell-heather |
S1 |
G5 |
T |
| Hedysarum alpinum ssp. americanum |
Alpine sweet-broom |
S3 |
G5T5? |
SC |
| Heteranthera dubia |
Water stargrass |
S3 |
G5 |
SC |
| Hieracium gronovii * |
Hairy hawkweed |
SX |
G5 |
PE |
| Hieracium robinsonii |
Robinson's hawkweed |
S1 |
G3 |
E |
| Hieracium venosum |
Rattlesnake hawkweed |
S1 |
G5T4Q |
E |
| Hottonia inflata |
Featherfoil |
S1 |
G4 |
T |
| Houstonia longifolia |
Long-leaved bluet |
S2S3 |
G5TNR |
SC |
| Huperzia apressa |
Mountain firmoss |
S2 |
G5 |
SC |
| Huperzia selago |
Northern firmoss |
S2 |
G5 |
T |
| Hypericum ascyron |
Great St. John's-wort |
S1 |
G4 |
E |
| Hypoxis hirsuta * |
Yellow star-grass |
SX |
G5 |
PE |
| Ilex glabra |
Ink-berry |
S1 |
G5 |
E |
| Ilex laevigata |
Smooth winterberry holly |
S3 |
G5 |
SC |
| Impatiens pallida |
Pale jewel-weed |
S2 |
G5 |
SC |
| Iris prismatica |
Slender blue flag |
S2 |
G4G5 |
T |
| Isoetes acadiensis |
Acadian quillwort |
S2 |
G3 |
SC |
| Isoetes prototypus |
Prototype quillwort |
S1 |
G2 |
T |
| Isoetes riparia var. canadensis * |
Shore quillwort |
S1 |
G5TNRQ |
E |
| Isotria medeoloides |
Small whorled pogonia |
S2 |
G2G3 |
E |
| Isotria verticillata * |
Large whorled pogonia |
SX |
G5 |
PE |
| Iva frutescens ssp. oraria |
Marsh-elder |
S1 |
G5T5 |
E |
| Juncus alpinoarticulatus ssp. americanus |
Alpine rush |
S3 |
G5T5 |
SC |
| Juncus secundus |
Secund rush |
S1 |
G5? |
T |
| Juncus stygius ssp. americanus |
Moor rush |
S2 |
G5T5 |
SC |
| Juncus subtilis |
Slender rush |
S1 |
G5? |
E |
| Juncus torreyi * |
Torrey's rush |
SH |
G5 |
PE |
| Juncus vaseyi |
Vasey's rush |
S1 |
G5 |
E |
| Kalmia latifolia |
Mountain-laurel |
S2 |
G5 |
SC |
| Kalmia procumbens |
Alpine-azalea |
S1 |
G5 |
T |
| Krigia virginica |
Dwarf dandelion |
S1 |
G5 |
E |
| Lechea tenuifolia * |
Slender pinweed |
SX |
G5 |
PE |
| Lespedeza hirta ssp. hirta |
Hairy bush-clover |
S1 |
G5T5? |
E |
| Liatris novae-angliae |
Northern blazing star |
S1 |
G5?T3 |
T |
| Lilaeopsis chinensis |
Lilaeopsis |
S2 |
G5 |
SC |
| Limosella australis |
Mudwort |
S3 |
G5 |
SC |
| Lindera benzoin |
Spicebush |
S3 |
G5 |
SC |
| Lindernia dubia var. anagallidea |
Slender false pimpernel |
S1 |
G5T4 |
SC |
| Lipocarpha micrantha |
Dwarf bulrush |
S1 |
G5 |
T |
| Lobelia siphilitica * |
Great blue lobelia |
SX |
G5 |
PE |
| Lomatogonium rotatum |
Marsh felwort |
S1 |
G5 |
T |
| Lonicera dioica |
Mountain honeysuckle |
S2 |
G5 |
E |
| Lonicera oblongifolia |
Swamp honeysuckle |
S3 |
G5 |
SC |
| Lupinus perennis * |
Wild lupine |
SX |
G5T4? |
PE |
| Luzula confusa |
Northern wood rush |
S1 |
G5 |
E |
| Luzula spicata |
Spiked wood rush |
S1 |
G5 |
T |
| Lycopodiella alopecuroides |
Foxtail bog-clubmoss |
S1 |
G5 |
E |
| Lycopodiella appressa |
Southern bog-clubmoss |
S1 |
G5 |
E |
| Malaxis monophyllos ssp. brachypoda |
White adder's-mouth |
S1 |
G5T4T5 |
E |
| Micranthes foliolosa |
Star saxifrage |
S1 |
G4 |
E |
| Mikania scandens * |
Climbing hempweed |
SH |
G5 |
PE |
| Minuartia glabra |
Smooth sandwort |
S3 |
G4 |
SC |
| Minuartia groenlandica |
Mountain sandwort |
S3 |
G5 |
SC |
| Minuartia michauxii |
Michaux's sandwort |
S1 |
G5 |
E |
| Minuartia rubella |
Arctic sandwort |
S1 |
G5 |
E |
| Montia fontana |
Blinks |
S2 |
G5 |
SC |
| Muhlenbergia richardsonis |
Soft-leaf muhly |
S3 |
G5 |
SC |
| Muhlenbergia sobolifera |
Cliff muhly |
S1 |
G5 |
E |
| Nabalus boottii |
Boott's rattlesnake-root |
S1 |
G2 |
E |
| Nabalus racemosus |
Glaucous rattlesnake-root |
S3 |
G5 |
SC |
| Neottia auriculata |
Auricled twayblade |
S2 |
G3G4 |
T |
| Nuphar advena |
Yellow pond-lily |
S2 |
G5T5 |
SC |
| Nymphaea leibergii |
Pygmy water-lily |
S1S2 |
G5 |
T |
| Oenothera nutans * |
Riverbank evening primrose |
SH |
G4 |
PE |
| Omalotheca supina |
Alpine cudweed |
S1 |
G5 |
E |
| Ophioglossum pusillum |
Adder's-tongue fern |
S1 |
G5 |
E |
| Osmorhiza depauperata* |
Blunt-fruited sweet-cicely |
SH |
G5 |
PE |
| Oxytropis campestris var. johannensis |
St. John oxytrope |
S1 |
G5T4 |
T |
| Panax quinquefolius |
American ginseng |
S3 |
G3G4 |
E |
| Parietaria pensylvanica * |
Pennsylvania pellitory |
SX |
G5 |
PE |
| Paronychia argyrocoma |
Silverling |
S1 |
G4 |
T |
| Pedicularis furbishiae |
Furbish's lousewort |
S1S2 |
G1G2 |
E |
| Persicaria robustior * |
Stout smartweed |
SH |
G4G5 |
PE |
| Phegopteris hexagonoptera |
Broad beech fern |
S2 |
G5 |
SC |
| Phleum alpinum |
Mountain timothy |
S2 |
G5 |
T |
| Phryma leptostachya * |
American Lopseed |
SH |
G5 |
PE |
| Phyllodoce caerulea |
Mountain heath |
S1 |
G5 |
T |
| Pinguicula vulgaris |
Common butterwort |
S1 |
G5 |
E |
| Piptatherum canadense |
Canada mountain-rice grass |
S2 |
G4G5 |
SC |
| Platanthera flava var. herbiola |
Pale green orchis |
S2 |
G4?T4Q |
SC |
| Platanthera leucophaea |
Prairie white-fringed orchid |
S1 |
G2G3 |
E |
| Platanus occidentalis * |
Sycamore |
SX |
G5 |
PE |
| Poa glauca |
White bluegrass |
S1 |
G5 |
T |
| Poa laxa ssp. fernaldiana |
Wavy bluegrass |
S1 |
G5?T3 |
E |
| Polemonium vanbruntiae |
Bog Jacob's-ladder |
S1 |
G3G4 |
E |
| Polygala cruciata ssp. aquilonia * |
Marsh milkwort |
SH |
G5T4 |
PE |
| Polygala senega |
Seneca snakeroot |
S1 |
G4G5 |
E |
| Polygonum douglasii |
Douglas' knotweed |
S2 |
G5 |
SC |
| Polygonum tenue * |
Slender knotweed |
SH |
G5 |
PE |
| Potamogeton friesii |
Fries' pondweed |
S1 |
G5 |
E |
| Potamogeton pulcher |
Spotted pondweed |
S1 |
G5 |
T |
| Potamogeton strictifolius |
Straight-leaved pondweed |
S1 |
G5 |
T |
| Potamogeton vaseyi |
Vasey's pondweed |
S2 |
G4 |
SC |
| Primula laurentiana |
Bird's-eye primrose |
S2 |
G5 |
SC |
| Primula mistassinica |
Mistassini primrose |
S3 |
G5 |
SC |
| Proserpinaca pectinata |
Comb-leaved mermaid-weed |
S1 |
G5 |
E |
| Prunus maritima |
Beach plum |
S1 |
G4 |
E |
| Pseudognaphalium micradenium * |
Small rabbit-tobacco |
SH |
G4G5T3? |
PE |
| Pycnanthemum muticum * |
Blunt mountain-mint |
SH |
G5 |
PE |
| Pyrola minor |
Lesser wintergreen |
S2 |
G5 |
SC |
| Quercus bicolor |
Swamp white oak |
S1 |
G5 |
T |
| Quercus coccinea |
Scarlet oak |
S1 |
G5 |
E |
| Quercus montana |
Chestnut oak |
S1 |
G5 |
T |
| Ranunculus ambigens * |
Water-plantain spearwort |
SH |
G4 |
PE |
| Ranunculus fascicularis |
Early crowfoot |
S1 |
G5 |
T |
| Ranunculus gmelinii |
Small yellow water crowfoot |
S2 |
G5T5 |
SC |
| Rhododendron lapponicum |
Lapland rosebay |
S1 |
G5 |
T |
| Rhododendron maximum |
Great rhododendron |
S1 |
G5 |
T |
| Rhododendron viscosum |
Clammy azalea |
S1 |
G5 |
E |
| Rhynchospora capillacea |
Horned beak-rush |
S1 |
G4G5 |
T |
| Rhynchospora macrostachya |
Tall beak-rush |
S1 |
G4 |
E |
| Rosa acicularis ssp. sayi * |
Prickly rose |
SH |
G5T5 |
PE |
| Sagittaria filiformis |
Narrow-leaved arrowhead |
S2 |
G4G5 |
SC |
| Sagittaria montevidensis ssp. spongiosa |
Spongy-leaved arrowhead |
S3 |
G5T4 |
SC |
| Sagittaria rigida |
Stiff arrowhead |
S2 |
G5 |
SC |
| Salicornia bigelovii |
Dwarf glasswort |
S1 |
G5 |
T |
| Salicornia maritima * |
Samphire |
SH |
G5 |
PE |
| Salix arctophila |
Arctic willow |
S1 |
G5 |
E |
| Salix argyrocarpa * |
Silverleaf willow |
SH |
G5 |
PE |
| Salix candida |
Hoary willow |
S1 |
G5 |
E |
| Salix exigua ssp. interior |
Sandbar willow |
S1 |
G5 |
E |
| Salix herbacea |
Dwarf willow |
S1 |
G5 |
T |
| Salix myricoides |
Blue-leaf willow |
S2 |
G4 |
T |
| Salix occidentalis |
Dwarf prairie willow |
SU |
G5T4T5 |
SC |
| Salix planifolia |
Tea-leaved willow |
S1 |
G5 |
T |
| Salix uva-ursi |
Bearberry willow |
S1 |
G5 |
T |
| Samolus valerandi ssp. parviflorus |
Water pimpernel |
S3 |
G5 |
SC |
| Sanguisorba canadensis |
Canada burnet |
S1 |
G5 |
T |
| Sassafras albidum |
Sassafras |
S2 |
G5 |
SC |
| Saxifraga cespitosa |
Tufted saxifrage |
S1 |
G5 |
E |
| Saxifraga paniculata ssp. neogaea |
Livelong saxifrage |
S1 |
G5T5? |
E |
| Scirpus georgianus |
Georgia bulrush |
SU |
G5 |
SC |
| Scirpus longii |
Long's bulrush |
S2 |
G3 |
T |
| Scirpus pendulus |
Pendulous bulrush |
S2 |
G5 |
SC |
| Scrophularia marilandica * |
Carpenter's square |
SX |
G5 |
PE |
| Scutellaria parvula var. missouriensis * |
Leonard's skullcap |
SH |
G4T4 |
PE |
| Selaginella apoda |
Creeping spike-moss |
S2 |
G5 |
E |
| Selaginella selaginoides |
Low spike-moss |
S1 |
G5 |
T |
| Sericocarpus asteroides |
White-topped aster |
S1 |
G5 |
E |
| Shepherdia canadensis |
Canada buffaloberry |
S1 |
G5 |
E |
| Silene acaulis var. excapa * |
Moss campion |
SX |
G5T5 |
PE |
| Solidago leiocarpa |
Cutler's goldenrod |
S1 |
G3 |
T |
| Solidago speciosa |
Showy goldenrod |
S1 |
G5 |
T |
| Sorghastrum nutans |
Indian grass |
S1 |
G5 |
E |
| Sphenopholis obtusata * |
Prairie wedge-grass |
SH |
G5 |
PE |
| Spiranthes lacera var. gracilis * |
Southern Slender Ladies'-tresses |
SH |
G5T4T5 |
PE |
| Spiranthes lucida |
Shining ladies'-tresses |
S1 |
G4 |
T |
| Sporobolus compositus var. drummondii |
Longleaf dropseed |
S1 |
G5TNR |
E |
| Stuckenia filiformis |
Northern Slender Pondweed |
S2 |
G5 |
SC |
| Suaeda calceoliformis |
American sea-blite |
S2 |
G5 |
T |
| Symphyotrichum anticostense |
Anticosti aster |
S1 |
G3 |
E |
| Symphyotrichum dumosum * |
Bushy aster |
SH |
G5 |
PE |
| Symphyotrichum patens * |
Late purple aster |
SX |
G5 |
PE |
| Symphyotrichum subulatum |
Small salt-marsh aster |
S1 |
G5T5 |
E |
| Tanacetum bipinnatum ssp. huronense |
Huron tansy |
S2S3 |
G5T4T5 |
SC |
| Thalictrum thalictroides |
Rue-anemone |
S1 |
G5 |
E |
| Thalictrum venulosum var. confine |
Boundary meadow-rue |
S1 |
G4? |
E |
| Trichophorum clintonii |
Clinton's bulrush |
S3 |
G4 |
SC |
| Triglochin gaspensis |
Gaspé arrow-grass |
S2 |
G4G5 |
SC |
| Trillium grandiflorum * |
Large white trillium |
SH |
G5 |
PE |
| Triosteum aurantiacum |
Wild coffee |
S1 |
G5 |
E |
| Triphora trianthophora |
Nodding pogonia |
S2 |
G4? |
T |
| Ulmus rubra * |
Slippery elm |
SH |
G5 |
PE |
| Vaccinium boreale |
Alpine blueberry |
S2 |
G4G5 |
SC |
| Vahlodea atropurpurea |
Mountain hairgrass |
S1 |
G5 |
E |
| Valeriana uliginosa |
Marsh valerian |
S2 |
G4 |
SC |
| Verbena urticifolia |
White vervain |
S1? |
G5 |
SC |
| Veronica wormskjoldii |
Alpine speedwell |
S1 |
G5 |
E |
| Viola canadensis * |
Tall white violet |
SH |
G5 |
PE |
| Viola novae-angliae |
New England violet |
S2 |
G4 |
SC |
| Viola palmata * |
Palmate-leaved violet |
SH |
G5 |
PE |
| Vitis aestivalis var. bicolor |
Summer grape |
S2 |
G5T5 |
T |
| Wolffia brasiliensis |
Pointed watermeal |
SU |
G5 |
SC |
| Wolffia columbiana |
Columbian watermeal |
S2 |
G5 |
SC |
| Woodsia alpina |
Northern woodsia |
S1 |
G4G5 |
T |
| Woodsia glabella |
Smooth woodsia |
S1 |
G5 |
T |
| Woodsia obtusa |
Blunt-lobed woodsia |
S1 |
G5 |
T |
| Woodwardia areolata * |
Netted chain fern |
SH |
G5 |
PE |
| Xyris smalliana |
Yellow-eyed grass |
S1 |
G4G5 |
E |
| Zannichellia palustris |
Horned pondweed |
S2 |
G5 |
SC |