| absinth | Artemisia absinthium |
| alfalfa | Medicago sativa |
| allegheny blackberry | Rubus allegheniensis |
| alpine enchanter's nightshade | Circaea alpina |
| alsike clover | Trifolium hybridum |
| alsine-like starwort | Stellaria alsine |
| alternate-leafed dogwood | Cornus alternifolia |
| american black currant | Ribes americanum |
| american brooklime | Veronica americana |
| american bugle-weed | Lycopus americanus |
| american bulrush | Scirpus americanus |
| American burnweed | Erechtites hieracifolia |
| american elm | Ulmus americana |
| American hydrangea | Hydrangea arborescens |
| american red currant | Ribes triste |
| andrew's rose-purple | Platathera x andrewsii |
| annual blue-grass | Poa annua |
| annual knawel | Scleranthus annuus |
| annual sow-thistle | Sonchus oleraceus |
| apple | Malus sylvestris |
| aquatic sedge | Carex aquatilis |
| arethusa | Arethusa bulbosa |
| arrow-leaved tearthumb | Polygonum sagittatum |
| Ashy cinquefoil | Potentilla intermedia |
| asparagus | Asparagus officinalis |
| autumn dandelion | Leontodon autumnalis |
| awnless brome-grass | Bromus inermis |
| bake-apple | Rubus chamaemorus |
| balsam fir | Abies balsamea |
| balsam poplar | Populus balsamifera |
| balsam willow | Salix pyrifolia |
| baltic rush | Juncus balticus |
| barnyard grass | Echinochloa crus-galli |
| bayberry | Myrica pensylvanica |
| beach pea | Lathyrus japonicus |
| beach spurry | Spergularia marina |
| beach-head iris | Iris setosa |
| beaked hazelnut | Corylus cornuta |
| beaked sedge | Carex rostrata |
| bearberry | Arctostaphylos uva-ursi |
| bearded shorthusk | Brachyelytrum erectum |
| Beautiful sunflower | Helianthus x laeteriflorus |
| bebb's willow | Salix bebbiana |
| beech | Fagus grandifolia |
| begger-ticks | Bidens tripartita |
| bird's-eye pearlwort | Sagina procumbens |
| bitter dock | Rumex obtusifolius |
| bitter-cress | Cardamine pensylvanica |
| black ash | Fraxinus nigra |
| black bindweed | Polygonum convolvulus |
| black chokeberry | Aronia melanocarpa |
| black crowberry | Empetrum nigrum |
| black elderberry | Sambucus canadensis |
| black grass | Juncus gerardii |
| black huckleberry | Gaylussacia baccata |
| Black knapweed | Centaurea nigra |
| black locust | Robinia pseudo-acacia |
| black medick | Medicago lupulina |
| black snakeroot | Sanicula marilandica |
| black spruce | Picea mariana |
| black-eyed susan | Rudbeckia hirta |
| blackish bulrush | Scirpus atrovirens |
| bladder campion | Silene vulgaris |
| bladder sedge | Carex intumescens |
| blake's aster | Aster x. blakei |
| blue lettuce | Lactuca biennis |
| blue marsh violet | Viola obliqua |
| Blue scorpion-grass | Myosotis stricta |
| blueberry | Vaccinium angustifolium |
| blueflowered blue-grass | Poa glaucantha |
| blunt spike-rush | Eleocharis obtusa |
| blunt-broom sedge | Carex tribuloides |
| blunt-leafed orchid | Platathera obtusata |
| blunt-leaved sandwort | Moehringia lateriflora |
| bog aster | Aster nemoralis |
| bog club-moss | Lycopodium inundatum |
| bog goldenrod | Solidago uliginosa |
| bog laurel | Kalmia polifolia |
| bog leather-leaf | Chamaedaphne calyculata |
| bog rosemary | Andromeda polifolia |
| bog violet | Viola nephrophylla |
| boneset | Eupatorium perfoliatum |
| boott's shield-fern | Dryopteris x boottii (Tuck) Underw. |
| boreal manna-grass | Glyceria borealis |
| bouncing bet | Saponaria officinalis |
| bracken fern | Pteridium aquilinum |
| branching grape-fern | Botrychium matricariifolium |
| bristly club-moss | Lycopodium annotinum |
| bristly crowfoot | Ranunculus pensylvanicus |
| bristly gooseberry | Ribes hirtellum |
| bristly sarsaparilla | Aralia hispida |
| broad-leafed twayblade | Listera convallarioides |
| broad-leaved arrowhead | Sagittaria latifolia |
| broom sedge | Carex scoparia |
| brown-fruited rush | Juncus pelocarpus |
| brownish sedge | Carex brunnescens |
| buckbean | Menyanthes trifoliata |
| bulbous water-hemlock | Cicuta bulbifera |
| bull thistle | Cirsium vulgare |
| bunch berry | Cornus canadensis |
| bush honeysuckle | Diervilla lonicera |
| bushy knotweed | Polygonum ramosissimum |
| butter-and-eggs | Linaria vulgaris |
| buttercup | Ranunculus acris |
| butternut | Juglans cinerea |
| Cabbage rose | Rosa centifolia |
| calico aster | Aster lateriflorus |
| canada blackberry | Rubus canadensis |
| canada blue-grass | Poa compressa |
| canada goldenrod | Solidago canadensis |
| canada hawkweed | Hieracium canadense |
| canada lettuce | Lactuca canadensis |
| canada reed-grass | Calamagrostis canadensis |
| canada thistle | Cirsium arvense |
| canada yew | Taxus canadensis |
| canadian sand spurry | Spergularia canadensis |
| canadian st. john's-wort | Hypericum canadense |
| caraway | Carum carvi |
| cattail | Typha latifolia |
| cedar-like club-moss | Lycopodium sabinifolium |
| chamisso's cotton-grass | Eriophorum chamissonis |
| chinese elm | Ulmus parvifolia |
| chives | Allium schoenoprasum |
| choke cherry | Prunus virginiana |
| ciliate brome-grass | Bromus ciliatus |
| ciliolate aster | Aster ciliolatus |
| cinnamon fern | Osmunda cinnamomea |
| clasping-leaved twist | Streptopus amplexifolius |
| clayton's bedstraw | Galium tinctorium |
| common burdock | Arctium minus |
| common chickweed | Stellaria media |
| common coltsfoot | Tussilago farfara |
| common great bulrush | Scirpus validus |
| common hemp-nettle | Galeopsis tetrahit |
| common hop | Humulus lupulus |
| common knotweed | Polygonum prolificum |
| common mugwort | Artemisia vulgaris |
| common orach | Atriplex patula |
| common peppergrass | Lepidium densiflorum |
| common plantain | Plantago major |
| common ragweed | Ambrosia artemisiifolia |
| common rattle | Rhinanthus minor |
| common rush | Juncus effusus |
| common saltwort | Salsola kali |
| common sedge | Carex communis |
| common speedwell | Veronica officinalis |
| common st. john's-wort | Hypericum perforatum |
| common stitchwort | Stellaria graminea |
| common tansy | Tanacetum vulgare |
| common water-starwort | Callitriche verna |
| common wild oat-grass | Danthonia spicata |
| Common witch grass | Panicum capillare |
| common wool-grass | Scirpus cyperinus |
| common yarrow | Achillea millefolium |
| compressed sedge | Carex arctata |
| coneflower | Rudbeckia laciniata |
| Corn speedwell | Veronica arvensis |
| corn spurry | Spergula arvensis |
| couch-grass | Agropyron repens |
| cow parsnip | Heracleum lanatum |
| cow vetch | Vicia cracca |
| cow-wheat | Melampyrum lineare |
| crawford's sedge | Carex crawfordii |
| creeping bellflower | Campanula rapunculoides |
| creeping bent-grass | Agrostis stolonifera |
| creeping crowfoot | Ranunculus repens |
| creeping snowberry | Gaultheria hispidula |
| crested wood fern | Dryopteris cristata |
| Cultivated wheat | Triticum aestivum |
| curled dock | Rumex crispus |
| cyperus-like sedge | Carex pseudo-cyperus |
| cypress spurge | Euphorbia cyparissias |
| daisy fleabane | Erigeron annuus |
| dandelion | Taraxacum officinale |
| day lily | Hemerocallis fulva |
| dense cotton-grass | Eriophorum spissum |
| dense sedge | Carex cumulata |
| depressed sedge | Carex deflexa |
| deptford pink | Dianthus armeria |
| devil's paint brush | Hieracium aurantiacum |
| dew drops | Dalibarda repens |
| dewberry | Rubus pubescens |
| dock-leaved knotweed | Polygonum lapathifolium |
| dogbane | Apocynum androsaemifolium |
| downy goldenrod | Solidago puberula |
| drooping woodreed | Cinna latifolia |
| dusty miller | Artemisia stellariana |
| dwarf huckleberry | Gaylussacia dumosa |
| dwarf mistletoe | Arceuthobium pusillum |
| dwarf rattlesnake plaintain | Goodyera repens |
| dwarf scouring-rush | Equisetum scirpoides |
| dyer's cleavers | Galium trifidum |
| early coral-root | Corallorhiza trifida |
| eastern hemlock | Tsuga canadensis |
| eastern white cedar | Thuja occidentalis |
| eelgrass | Zostera marina |
| elliptic st. john's-wort | Hypericum ellipticum |
| emersed pondweed | Potamogeton epihydrus |
| english hawthorn | Crataegus monogyna |
| erect cinquefoil | Potentilla recta |
| european garden columbine | Aquilegia vulgaris |
| evening primrose | Oenothera biennis |
| evening primrose | Oenothera parviflora |
| evergreen wood fern | Dryopteris intermedia |
| eyebright | Euphrasia nemorosa |
| false heather | Hudsonia tomentosa |
| false melic-grass | Schizachne purpurascens |
| false pimpernel | Lindernia dubia |
| false salamon's-seal | Smilacina racemosa |
| fan-shaped club-moss | Lycopodium digitatum |
| fernalds manna grass | Torreyochloa pallida (Torr.) Trin. |
| few-flowered sedge | Carex pauciflora |
| field chickweed | Cerastium arvense |
| field horsetail | Equisetum arvense |
| field mint | Mentha arvensis |
| field mustard | Brassica napus |
| filiform cotton-grass | Eriophorum tenellum |
| filiform sedge | Carex gracillima |
| fine bent grass | Agrostis capillaris |
| fireberry | Crataegus chrysocarpa |
| fireweed | Epilobium angustifolium |
| five-finger | Potentilla simplex |
| Five-stamen mouse-ear chickweed | Cerastium semidecandrum |
| flat-tapped white aster | Aster umbellatus |
| floating foxtail | Alopecurus geniculatus |
| fly honeysuckle | Lonicera canadensise |
| fly-away grass, tickle grass | Agrostis scabra |
| foul manna-grass | Glyceria striata |
| fowl blue-grass | Poa palustris |
| foxtail barley | Hordeum jubatum |
| fragile fern | Cystopteris fragilis |
| fragrant fern | Dryopteris fragrans |
| fresh water cord grass | Spartina pectinata |
| fringed bindweed | Polygonum cilinode |
| fringed sedge | Carex crinita |
| Frosted orach | Atriplex laciniata |
| garden orpine | Sedum telephium |
| Gaspé Peninsula arrow-grass | Triglochin gaspensis |
| glabrous-fruited sedge | Carex tonsa |
| glandular willow-herb | Epilobium ciliatum |
| glasswort | Salicornia europaea |
| gold thread | Clematis trifolia |
| golden ragwort | Senecio aureus |
| golden saxifrage | Chrysosplenium americanum |
| goose-tongue | Plantago maritima |
| grass-pink | Calopogon tuberosus |
| great water dock | Rumex orbiculatus |
| green adder's-mouth | Malaxis unifolia |
| green alder | Alnus viridis |
| green amaranth | Amaranthus retroflexus |
| green bur-weed | Sparganium chlorocarpum |
| green foxtail | Setaria viridis |
| grey birch | Betula populifolia |
| ground cedar | Lycopodium complanatum |
| ground ivy | Glecoma hederacea |
| ground nut | Apios americana |
| ground pine | Lycopodium obscurum |
| guelder rose | Viburnum opulus |
| hairy brome-grass | Bromus pubescens |
| hairy goldenrod | Solidago hispida |
| halberd-leaved tearthumb | Polygonum arifolium |
| hard-stemed bulrush | Scirpus acutus |
| hay-scented fern | Dennstaedtia punctilobula |
| heal-all | Prunella vulgaris |
| heart leaved aster | Aster cordifolius |
| heart-leaved twayblade | Listera cortada |
| hedge birdweed | Calystegia sepium |
| hedge mustard | Sisymbrium officinale |
| hobble-bush | Viburnum lantanoides |
| hooded ladies'-tresse | Spiranthes romanzoffiana |
| hooker's orchid | Platanthera hookeri |
| hop-clover | Trifolium aureum |
| horned bladderwort | Utricularia cornuta |
| horned pondweed | Zanichellia palustris |
| horse-chestnut | Aesculus hippocastanum |
| horseweed | Conyza canadensis |
| houghton's sedge | Carex houghtonii |
| indian cucumber-root | Medeola virginiana |
| indian grass | Hierochloe odorata |
| indian tobacco | Lobelia inflata |
| indian-pipe | Monotropa uniflora |
| inland sedge | Carex interior |
| intermediate sundew | Drosera intermedia |
| interrupted fern | Osmunda claytoniana |
| jack pine | Pinus banksiana |
| jack-in-the-pulpit | Arisaema triphyllum |
| japanese knotweed | Polygonum cuspidatum |
| jerusalem artichoke | Helianthus tuberosus |
| joe-pye-weed | Eupatorium maculatum |
| jointed rush | Juncus articulatus |
| kentucky blue-grass | Poa pratensis |
| kidney leaf buttercup | Ranunculus arbortivus |
| king devil | Hieracium piloselloides |
| knotted rush | Juncus nodosus |
| knotweed | Polygonum aviculare |
| labrador tea | Ledum groenlandicum |
| lady fern | Athyrium filix-femina |
| lady's-thumb | Polygonum persicaria |
| lamb's-quarters | Chenopodium album |
| lance-leaved violet | Viola lanceolata |
| large blue-flag | Iris versicolor |
| large cranberry | Vaccinium macrocarpon |
| large purple-fringed | Platanthera grandiflora |
| large-leaved aster | Aster macrophyllus |
| large-leaved begger-ticks | Bidens frondosa |
| large-leaved goldenrod | Solidago macrophylla |
| larger water-starwort | Callitriche heterophylla |
| large-toothed aspen | Populus grandidentata |
| leathery grape-fern | Botrychium multifidum |
| leptonerved sedge | Carex leptonervia |
| lesser snop dragon | Anthirrhinum orontinum |
| lilac | Syringa vulgaris |
| lily-of-the-valley | Conuallaria majalis |
| little moonwort | Botrychium simplex |
| lombardy poplar | Populus nigra |
| long manna-grass | Glyceria melicaria |
| long-leaved dock | Rumex longifolius |
| long-leaved fescue | Festuca longifolia |
| long-leaved speedwell | Veronica longifolia |
| low cudweed | Gnaphalium uliginosum |
| low hop-clover | Trifolium campestre |
| low spike-rush | Eleocharis parvula |
| mackenzie's sedge | Carex mackenziei |
| mad-dog skullcap | Scutellaria lateriflora |
| manitoba maple | Acer negundo |
| manna-grass | Glyceria canadensis |
| many-flowered woodrush | Luzula multiflora |
| marginal shield-fern | Dryopteris marginalis |
| maritime chamomile | Matricaria maritima |
| maritime dock | Rumex maritimus |
| marram grass | Ammophila breviligulata |
| marsh arrow-grass | Triglochin palustris |
| marsh bedstraw | Galium palustre |
| marsh cinquefoil | Potentilla palustris |
| marsh fern | Thelypteris palustris |
| marsh ledge nettle | Stachys palustris |
| marsh marigold | Caltha palustris |
| marsh pea | Lathyrus palustris |
| marsh pennywort | Hydrocotyle americana |
| marsh speedwell | Veronica scutellata |
| marsh st.john's-wort | Triadenum fraseri |
| mayflower | Epigaea repens |
| Meadow fescue | Festuca pratensis |
| meadow foxtail | Alopecurus pratensis |
| meadow horsetail | Equisetum pratense |
| meadow sweet | Spiraea latifolia |
| mitrewort | Mitella nuda |
| monkey-flower | Mimulus ringens |
| Moss phlox | Phlox subulata |
| mountain ash | Sorbus americana |
| mountain blue-eyed grass | Sisyrinchium montanum |
| mountain cranberry | Vaccinium vitis-idaea |
| mountain juneberry | Amelanchier bartramiana |
| mountain maple | Acer spicatum |
| mountain wood fern | Dryopteris campyloptera |
| mouse-ear chickweed | Cerastium fontanum |
| Mouse-ear hawkweed | Hieracium pilosella |
| mouse-ear hawkweed | Hieracium x. flagellare |
| mud sedge | Carex limosa |
| mullein | Verbascum thapsus |
| musk mallow | Malva moschata |
| narrow leaved dock | Rumex salicifolius |
| narrow sedge | Carex angustior |
| narrow-leaved cotton-grass | Eriophorum angustifolium |
| narrow-leaved goldenrod | Solidago graminifolia |
| narrow-leaved willow-herb | Epilobium leptophyllum |
| new england sedge | Carex novae-angliae |
| new york aster | Aster novi-belgii |
| new york fern | Thelypteris noveboracensis |
| Ninebark | Physocarpus opulifolius |
| nodding begger-ticks | Bidens cernua |
| nodding trillium | Trillium cernuum |
| northern beech-fern | Thelypteris phegopteris |
| northern bugle-weed | Lycopus uniflorus |
| northern commandra | Geocaulon lividum |
| northern crowfoot | Ranunculus septentrionalis |
| northern st. john's-wort | Hypericum boreale |
| northern starwort | Stellaria calycantha |
| northern white violet | Viola macloski |
| oak fern | Gymnocarpium dryopteris |
| Oat | Avena sativa |
| Old-field toadflax | Nuttalanthus canadensis |
| One-flowered dropseed | Mulhenbergia uniflora |
| one-flowered pyrola | Moneses uniflora |
| orange lily | Lilium bulbiferum |
| Orchard grass | Dactylis glomerata |
| ostrich fern | Matteuccia struthiopteris |
| ox-eye daisy | Leucantheum vulgare |
| painted trillium | Trillium undulatum |
| pale sedge | Carex pallescens |
| Pansy | Viola tricolor |
| paper birch | Betula papyrifera |
| partridge-berry | Mitchella repens |
| pasture rose | Rosa carolina |
| pearly everlasting | Anaphalis margaritacea |
| pectinate pondweed | Potamogeton pectinatus |
| pennsylvania knotweed | Polygonum pensylvanicum |
| pennycress | Thlaspi arvense |
| perennial bentgrass | Agrostis perennans |
| perennial rye grass | Lolium perenne |
| pine twisted stalk | Streptopus roseus |
| pineapple weed | Matricaria matricarioides |
| pine-sap | Monotropa hypopithys |
| pink lady's slipper | Cypripedium acaule |
| pink pyrola | Pyrola asarifolia |
| pin-weed | Lechea intermedia |
| pitcher-plant | Sarracenia purpurea |
| poison ivy | Toxicodendron rydbergii (Small) |
| polypody fern | Polypodium virginianum |
| porcupine sedge | Carex hystericina |
| prickly cucumber | Echinocystis lobata |
| prickly sedge | Carex echinata |
| prince's pine | Chimaphila unbellata |
| prostrate orach | Atriplex prostrata |
| purple avens | Geum rivale |
| Purple crown-vetch | Coronilla varia |
| purple sand spurry | Spergularia rubra |
| purple stemmed aster | Aster puniceus |
| Purslane speedwell | Veronica peregrina |
| pussy willow | Salix discolor |
| pussytoes | Antennaria neglecta |
| raspberry | Rubus strigosus |
| rattlesnake fern | Botrychium virginianum (L) Sw. |
| rattlesnake-root | Prenanthes trifoliolata |
| rayless aster | Aster laurentianus |
| red ash | Fraxinus pennsylvanica |
| red baneberry | Actaea rubra (Ait.) |
| red cherry | Prunus pensylvanica |
| red clover | Trifolium pratense |
| red club-rush | Scirpus rufus |
| red elderberry | Sambucus racemosa |
| red fescue | Festuca rubra |
| red maple | Acer rubrum |
| red oak | Quercus rubra |
| red pine | Pinus resinosa |
| red spruce | Picea rubens. |
| red tipped willow | Salix eriocephala |
| red-osier | Cornus sericea |
| redtop | Agrostis gigantea |
| reed canary grass | Phalaris arundinacea |
| reed grass | Phragmites australis |
| retrorse sedge | Carex retrorsa |
| rhodora | Rhododendron canadense |
| rhubarb | Rheum rhaponticum |
| river horsetail | Equisetum fluviatile |
| rock-harlequin | Corydalis sempervirens |
| rose pogonia | Pogonia ophioglossoides |
| rough aster | Aster radula |
| rough bedstraw | Galium asprellum |
| rough cinquefoil | Potentilla norvegica |
| rough goldenrod | Solidago rugosa |
| rough hawkweed | Hieracium scabrum |
| rough oryzopsis | Oryzopsis asperifolia |
| rough sedge | Carex scabrata |
| Rough-stalked meadow grass | Poa trivialis |
| round-leafed orchid | Platathera orbiculata |
| round-leafed pyrola | Pyrola americana |
| round-leaved sundew | Drosera rotundifolia |
| royal fern | Osmunda regalis |
| rugged-fringed orchid | Platanthera lacera |
| Running mallow | Malva neglecta |
| salt meadow cord grass | Spartina patens |
| salt water cord grass | Spartina alterniflora |
| salt-marsh bulrush | Scirpus maritimus |
| salt-marsh sedge | Carex salina |
| Saltmarsh spike-rush | Eleocharis halophila |
| sandy knotweed | Polygonum arenastrum |
| sarsaparilla | Aralia nudicaulis |
| scaly sedge | Carex paleacea |
| sea blite | Suaeda maritima |
| sea lavender | Limonium carolinianum |
| sea milkwort | Glaux maritima |
| sea parsley | Ligusticum scothicum |
| sea rocket | Cakile edentula |
| sea-beach sandwort | Honkenya peploides |
| sea-beach sedge | Carex silicea |
| sea-coast angelica | Angelica lucida |
| sea-grass | Ruppia maritima |
| seaside arrow-grass | Triglochin martima |
| seaside crowfoot | Ranunculus cymbalaria |
| seaside goldenrod | Solidago sempervirens |
| sea-side orach | Atriplex littoralis |
| sea-side pin-weed | Lechea maritima |
| seaside spike-rush | Eleocharis erythropoda |
| sensitive fern | Onoclea sensibilis |
| service-berry | Amelanchier arborea |
| sessile-leaved bellwort | Uvularia sessifolia |
| shadbush | Amelanchier stolonifera |
| sheep laurel | Kalmia angustifolia |
| sheep sorrel | Rumex acetosella |
| shepherd`s purse | Capsella bursa-pastoris |
| shining club-moss | Lycopodium lucidulum |
| shining willow | Salix lucida |
| shin-leaf | Pyrola elliptica |
| short-awned foxtail | Alopecurus aequalis |
| short-caudate rush | Juncus brevicaudatus |
| showy mountain ash | Sorbus decora |
| Shrubby cinquefoil | Pentaphylloides floribunda |
| silver rod | Solidago bicolor |
| silverweed | Potentilla anserina |
| silvery cinquefoil | Potentilla argentea |
| silvery sedge | Carex canescens |
| skullcap | Scutellaria galericulata |
| skunk currant | Ribes glandulosum |
| slashed avens | Geum laciniatum |
| slender ladies'-tresse | Spiranthes lacera |
| slender rush | Juncus tenuis |
| small crab-grass | Digitaria ischaemum |
| small cranberry | Vaccinium oxycoccos |
| small green wood orchid | Platanthera clavellata |
| small purple-fringed | Platathera psychodes |
| smoothish hawkweed | Hieracium x. floribundum |
| sneezewort yarrow | Achillea ptarmica |
| snowberry | Symphoricarpos albus |
| Snow-in-summer | Cerastium tomentosum |
| soapberry | Shepherdia canadensis |
| sorbaria | Sorbaria sorbifolia |
| southern twayblade | Listera australis |
| sow-thistle | Sonchus arvensis |
| speckled alder | Alnus incana |
| spiked spikegrass | Distichlis spicata |
| spikenard | Aralia racemosa |
| spinulose shield-fern | Dryopteris spinulosa |
| spotted coral-root | Corallorhiza maculata |
| Spring speedwell | Veronica verna |
| spring vetch | Vicia sativa |
| Spring whitlow-grass | Draba verna |
| staghorn club-moss | Lycopodium clavatum |
| Stalked bulrush | Scirpus pedicellatus |
| star-flower | Trientalis borealis |
| starry false salamon | Smilacina stellata |
| steeple-bush | Spiraea tomentosa |
| Sticky groundsel | Senecio viscosus |
| stipitate sedge | Carex stipata |
| stout goldenrod | Solidago squarrosa |
| strand wheat | Elymus mollis |
| strigose fleabane | Erigeron strigosus |
| striped maple | Acer pensylvanicum |
| stunted sedge | Carex paupercula |
| subulate mudweed | Limosella australis |
| sugar maple | Acer saccharum |
| sundrops | Oenothera perennis |
| swamp currant | Ribes lacustre |
| swamp dodder | Cuscuta gronovii |
| swamp rose | Rosa palustris Marsh. |
| swamp spike-rush | Eleocharis smallii |
| swamp thistle | Cirsium muticum |
| swamp willow-herb | Epilobium palustre |
| swaying rush | Scirpus subterminalis |
| sweet coltsfoot | Petasites frigidus |
| sweet fern | Comptonia peregrina |
| sweet gale | Myrica gale |
| Sweet vernal grass | Anthoxanthum odoratum |
| sweet-scented bedstraw | Galium triflorum |
| Tall fescue | Festuca arundinacea |
| tall manna-grass | Glyceria grandis |
| tall meadow-rue | Thalictrum pubescens |
| tall northern bog orchid | Platanthera hyperborea |
| tall rattlesnake-root | Prenanthes altissima |
| tall white bog orchid | Platanthera dilatata |
| tamarack, larch, (hac) | Larix laricina |
| tansey ragwort | Senecio jacobaea |
| tansy mustard | Descurainia sophia |
| tapegrass | Vallisneria americana |
| Tapered panic grass | Panicum acuminatum |
| tartarian honeysuckle | Lonicera tatarica |
| tawny cotton-grass | Eriophorum virginicum |
| tesselated rattlesnake | Goodyera tesselata |
| thread rush | Juncus filiformis |
| three-fruited sedge | Carex trisperma |
| three-leaved false solomon | Smilacina trifolia |
| three-spiked club-moss | Lycopodium tristachyum |
| three-toothed cinque | Potentilla tridentata |
| three-way sedge | Dulichium arundinaceum |
| thyme-leaf speedwell | Veronica serpyllifolia |
| tiger lily | Lilium tigrinum |
| timothy | Phleum pratense |
| toad rush | Juncus bufonius |
| touche-me-not | Impatiens capensis |
| trembling aspen | Populus tremuloides |
| tufted bulrush | Scirpus cespitosus |
| tufted loosestrife | Lysimachia thyrsiflora |
| tumbling mustard | Sisymbrium altissimum |
| turtle-head | Chelone glabra |
| twin-flower | Linnaea borealis |
| twin-scaped bladderwort | Utricularia geminiscapa |
| two-seeded sedge | Carex disperma |
| upland willow | Salix humilis |
| velvet honeysuckle | Lonicera villosa |
| velvet leaf blueberry | Vaccinium myrtilloides |
| virginia creeper | Parthenocissus inserta |
| virginia rose | Rosa virginiana |
| virgin's bower | Clematis virginiana |
| water knotweed | Polygonum punctatum |
| water parsnip | Sium suave |
| water-crowfoot | Ranunculus aquatilis |
| water-hemlock | Cicuta maculata |
| water-pimpernel | Samolus valerandi |
| weak sedge | Carex debilis |
| White ash | Fraxinus americana |
| white beak-rush | Rhynchospora alba |
| white bedstraw | Galium mollugo |
| white clover | Trifolium repens |
| white fringed orchid | Platanthera blephariglottis |
| white melilot | Melilotus alba |
| white pine | Pinus strobus |
| white spruce | Picea glauca |
| White willow | Salix alba |
| wild chamomile | Matricaria chamomilla |
| wild chicory | Cichorium intybus |
| wild holly | Nemopanthus mucronatus |
| wild lily-of-the-valley | Maianthemum canadense |
| wild madder | Galium obtusum |
| wild mustard | Sinapis arvensis |
| wild radish | Raphanus raphanistrum |
| wild raisin | Viburnum cassinoides |
| wild strawberry | Fragaria virginiana |
| willow weed | Polygonum lapathifolium |
| winter cress | Barbarea vulgaris |
| winterberry | Ilex verticillata |
| wintergreen | Gaultheria procumbens |
| wood cudweed | Gnaphilium sylvaticum |
| wood horsetail | Equisetum sylvaticum |
| wood sorrel | Oxalis acetosella |
| Woodland strawberry | Fragaria vesca |
| wood-sage | Teucrium canadense |
| worled wood aster | Aster acuminatus |
| wormseed mustard | Erysimum cheiranthoides |
| yellow birch | Betula alleghaniensis |
| yellow clintonia | Clintonia borealis |
| yellow cress | Rorippa palustris |
| yellow foxtail | Setaria glauca |
| yellow lady's slipper | Cypripedium calceolus |
| yellow loosestrife | Lysimachia terrestris |
| yellow pond-lily | Nuphar luteum |
| yellow wood sorrel | Oxalis dillenii |
| yellow wood sorrel | Oxalis stricta |
| yellow-eyed-grass | Xyris montana |
| Yellow-king-devil | Hieracium caespitosum |
| | Amelanchier laevis |
| | Brassica campestris = B. napus |
| | Calamagrostis stricta |
| | Carex wiegandii |
| | Chrysanthemum leucanthemum = Levanthemum |
| | Coelopleurum lucidum = Angelica lucida |
| | Comandra umbellata |
| | Dichanthelium boreale |
| | Eleocharis aciularis |
| | Erigeron canadensis = Conzya canadensis |
| | Euphorbia polygonifolia |
| | Euphrasia arctica |
| | Euphrasia borealis = Euphrasia arctica |
| | Hieracium lanchenalii |
| | Hieracium maculatum |
| | Hieracium reticulatum |
| | Lemma minor |
| | Luzula campestris |
| | Orthilia secunda |
| | Panicum columbianum |
| | Paranthenocissus vitacea =P.inserta |
| | Potamogeton perfoliatus |
| | Puccinellia distans |
| | Puccinellia langeana |
| | Rhus radicans = Toxicodendran rydbergii |
| | Rorippa islandica Borbas = R. palustris |
| | Rosa canina |
| | Rosa spinosissima L. |
| | Rumex maritimus |
| | Salix candida |
| | Salix petiolaris |
| | Scheuchzeria palustris |
| | Scirpus microcarpus |
| | Spiranthes lacera |
| | Trifolium arvense |
| | Viburnum alnifolium = V. lantanoides |
| | Vicia angustifolia = V. sativa |
| | Viola pallens = V. maclosky |