 |  | Abies balsamea (L.) Mill. | Balsam fir | Sapin baumier | Pinaceae | Tree |
| | Abies lasiocarpa (Hook.) Nutt. | Subalpine fir | Sapin subalpin | Pinaceae | Tree |
| | Acer negundo L. | Box elder | érable négondo, érable à Giguère | Aceraceae | Tree |
| | | Acer nigrum Michx. f. | Black maple | érable noir | Aceraceae | Tree |
| | Acer pensylvanicum L. | Moosewood, striped maple | érable de Pennsylvanie, bois barré, bois d'orignal | Aceraceae | Tree |
| | Acer rubrum L. | Red maple | érable rouge | Aceraceae | Tree |
| | Acer saccharinum L. | Silver maple, soft maple | érable argenté | Aceraceae | Tree |
| | Acer saccharum Marsh. | Sugar maple | érable à sucre | Aceraceae | Tree |
| | Acer spicatum Lam. | Mountain maple | érable à épis | Aceraceae | Tree |
| | Achillea millefolium L. | Yarrow, milfoil | Achillée millefeuille, herbe à dindes | Asteraceae | Herb |
| | Achillea millefolium L. var. occidentalis DC. Syn.: A. lanulosa Nutt. | Western yarrow | Achillée laineuse | Asteraceae | Herb |
| | | Achillea millefolium ssp. lanulosa (Nuttall) Piper var. lanulosa Syn.: A. millefolium L. var. borealis (Bong.) Farw.; A. borealis Bong. | Boreal yarrow, Siberian yarrow | Achillée laineuse | Asteraceae | Herb |
| | | Achillea sibirica Ledeb. | Siberian yarrow | Achillée de Sibérie | Asteraceae | Herb |
| | Aconogonon alaskanum (W. Wight ex Hultén) Soják var. alaskanum Syn.: Polygonum alpinum All.; P. alaskanum W. Wight ex Hultén | Alaska wild rhubarb | | Polygonaceae | Herb |
| | Acorus americanus (Raf.) Raf. | American sweetflag | Acore d'Amérique | Araceae | Herb |
| | Acorus calamus L. | Sweet flag | Acorus roseau, belle-angélique | Araceae | Herb |
| | Actaea pachypoda Elliot Syn.: A. alba (L.) Mill. | White baneberry | Actée à gros pédicelles | Ranunculaceae | Herb |
| | Actaea racemosa L. var. racemosa Syn.: Cimicifuga racemosa (L.) Nutt. | Cohosh root | Cimicaire à grappes | Ranunculaceae | Herb |
| | Actaea rubra (Aiton) Willd. | Red baneberry | Actée rouge, poison de couleuvre | Ranunculaceae | Herb |
| | Adiantum pedatum L. | Maidenhair fern | Adiante pédalé, capillaire du Canada | Pteridaceae | Herb |
| | Agastache foeniculum (Pursh) Kuntze Syn.: A.anethiodora (Nutt.) Britton | Giant hyssop | Agastache fenouil | Lamiaceae | Herb |
| | Agrimonia gryposepala Wallr. | Agrimony | Aigremoine à sépales crochus | Rosaceae | Herb |
| | Aletris farinosa L. | Unicorn root, colicroot | Alétris farineux | Liliaceae | Herb |
| | Alisma plantago-aquatica L. | Broad-leaved water plantain | Alisma commun | Alismataceae | Herb |
| | Allium stellatum Fraser ex Ker Gawl. | Wild onion | Ail étoilé | Liliaceae | Herb |
| | Allium tricoccum Aiton | Wild leek | Ail des bois | Liliaceae | Herb |
| | Alnus incana (L.) Moench ssp. rugosa (Du Roi) R.T. Clausen Syn.: A. rugosa (Du Roi) Spreng. | Speckled alder, mountain alder | Aulne rugueux | Betulaceae | Tree |
| | Alnus rubra Bong. | Red alder | Aulne rouge | Betulaceae | Tree |
| | | Alnus sp. | Alder | Aulne | Betulaceae | Tree |
| | Alnus viridis (Chaix) DC. | Green alder | Aulne crispé | Betulaceae | Tree |
| | Alnus viridis (Chaix) DC. ssp. crispa (Aiton) Turrill Syn: Alnus crispa (Aiton) Pursh | Green alder | Aulne crispé | Betulaceae | Tree |
| | | Amanita muscaria Fr. | Fly agaric | Amanite tue-mouche | Amanitaceae | Fungi |
| | Amelanchier alnifolia (Nutt.) Nutt ex M. Roem. | Saskatoon serviceberry, juneberry | Amélanchier à feuilles d'aulne, petites poires | Rosaceae | Shrub |
| | Amelanchier bartramiana (Tausch) M. Roem. | Bartram's shadbush | Amélanchier, de Bartram | Rosaceae | Tree |
| | Amelanchier canadensis (L.) Medik. | Shadbush, serviceberry | Amélanchier du Canada | Rosaceae | Tree |
| | Amelanchier laevis Wiegand | Smooth juneberry, glabrous shadbush | Amélanchier glabre, petites poires | Rosaceae | Tree |
| | Amorpha canescens Pursh | Leadplant | Faux indigo | Fabaceae | Shrub |
| | Amphicarpaea bracteata (L.) var. comosa (L.) Fernald Syn.: Falcata comosa (L.) Kuntze | Hogpeanut | Amphicarpe bractéolée | Fabaceae | Vine |
| | Anaphalis margaritacea (L.) Benth. | Pearly overlasting | Anaphale marguerite, immortelle | Asteraceae | Herb |
| | Andromeda polifolia L. var. latifolia Aiton Syn: Andromeda polifolia L. var. glaucophylla (Link) DC. | Glaucous-leaved bog rosemary | Andromède glauque | Ericaceae | Shrub |
| | Andropogon gerardii Vitman Syn.: Andropogon furcatus Muhl. ex Willd. | Big bluestem | Barbon de Gérard | Poaceae | Herb |
| | Androsace septentrionalis L. | Northern fairy-candelabra | Androsace septentrionale | Primulaceae | Herb |
| | Anemone canadensis L. | Canadian anemone | Anémone du Canada | Ranunculaceae | Herb |
| | Anemone cylindrica A. Gray | Thimble-weed | Anémone cylindrique | Ranunculaceae | Herb |
| | Anemone multifida Poir. Syn.: A.globosa (Torr. & A. Gray) Nutt. ex Pritz. | Wind-flower | Anémone multifide | Ranunculaceae | Herb |
| | | Anemone sp. | Anemone | Anémone | Ranunculaceae | Herb |
| | Antennaria howellii Greene ssp. neodioica (Greene) Bayer Syn.: A.neodioica Greene | Lesser cat's-foot | Antennaire néodioïque, immortelle | Asteraceae | Herb |
| | Antennaria neglecta Greene | Lesser pussytoes | Antennaire négligée | Asteraceae | Herb |
| | Antennaria plantaginifolia (L.) Richardson | Woman's tobacco | Antennaire à feuilles de plantain | Asteraceae | Herb |
| | Apocynum androsaemifolium L. | Spreading dogbane | Apocyn à feuilles d'androsème, herbe à puce, gobe-mouches | Apocynaceae | Herb |
| | Apocynum cannabinum L. Syn.: A. hypericifolium Aiton | Indian hemp | Apocyn chanvrin | Apocynaceae | Herb |
| | Aquilegia canadensis L. | Wild columbine | Ancolie du Canada | Ranunculaceae | Herb |
| | Aralia hispida Vent. | Bristly sarsaparilla, dwarf-elder | Aralie hispide, salsepareille | Araliaceae | Herb |
| | Aralia nudicaulis L. | Wild sarsaparilla | Aralie à tige nue, salsepareille | Araliaceae | Herb |
| | Aralia racemosa L. | Spikenard, petty morel, life-of-man | Aralie à grappes, grande salsepareille, anis sauvage | Araliaceae | Herb |
| | Arctium lappa L. | Burdock | Bardane majeure | Asteraceae | Herb |
| | | Arctium minus Bernh. | Burdock | Bardane mineure | Asteraceae | Herb |
| | | Arctostaphylos alpina (L.) Spreng. | Alpine bearberry | Busserole alpine | Ericaceae | Shrub |
| | Arctostaphylos uva-ursi (L.) Spreng. | Bearberry | Raisin d'ours | Ericaceae | Shrub |
| | Arisaema triphyllum (L.) Schott. | Indian turnip, jack-in-the-pulpit | Petit prêcheur | Araceae | Herb |
| | | Aristolochia serpentaria L. | Virginia snake-root | Serpentaire de Virginie | Aristolochiaceae | Herb |
| | Arnica angustifolia Vahl Syn: Arnica alpina (L.) Olin | Alpine arnica | Arnica à feuilles étroites | Asteraceae | Herb |
| | Artemisia absinthium L. | Wormwood | Armoise absinthe | Asteraceae | Herb |
| | Artemisia campestris L. | Field sagewort | Armoise rouge, aurone sauvage | Asteraceae | Herb |
| | Artemisia dracunculus L. Syn.: A.dracunculoides L. | Fuzzy weed, dragon wormwood | Estragon | Asteraceae | Herb |
| | Artemisia frigida Willd. | Prairie sagebrush, wild sage, pasture sage, fringed sagewort | Armoise douce | Asteraceae | Herb |
| | Artemisia ludoviciana Nutt. ssp. ludoviciana Syn.: A. gnaphalodes Nutt. | White mugwort | Armoise de Louisiane | Asteraceae | Herb |
| | | Artemisia norvegica ssp. saxatilis (Besser) H.M. Hall & Clements Syn: A. arctica Less. ssp. arctica | Mountain sagewort, arctic wormwood | Armoise saxatile | Asteraceae | Herb |
| | Artemisia tilesii Ledeb. Syn.: A. tilesii Ledeb. ssp. elatior (Torr. & A. Gray) Hultén | Tilesius wormwood | Armoise de Tilesius | Asteraceae | Herb |
| | Asarum canadense L. | Wild ginger | Asaret du Canada, gingembre sauvage | Aristolochiaceae | Herb |
| | Asclepias syriaca L. | Milkweed | Asclépiade commune, petits cochons | Asclepiadaceae | Herb |
| | Asclepias tuberosa L. | Butterfly milkweed, pleurisy root | Asclépiade tubéreuse | Asclepiadaceae | Herb |
| | | Aspidium cristatum (L.) Sw. | Shield fern | Dryoptère à crêtes | Polypodiaceae | Herb |
| | Astragalus americanus (Hook.) M.E. Jones | American milk-vetch, rattle-pod | Astragale d'Amérique | Fabaceae | Herb |
| | Astragalus crassicarpus Nutt. | Ground plum | Astragale graines-de-boeuf | Fabaceae | Herb |
| | Athyrium filix-femina (L.) Roth | Common ladyfern | Athyrium fougère-femelle | Dryopteridaceae | Herb |
| | Baptisia tinctoria (L.) R. Br. | Black root, wild indigo | Baptisie des teinturiers | Fabaceae | Herb |
| | Berberis vulgaris L. | Barberry | Berbéris vulgaire, épine-vinette | Berberidaceae | Shrub |
| | Betula alleghaniensis Britton Syn.: B. lutea Michx. f. | Yellow birch | Bouleau jaune, merisier | Betulaceae | Tree |
| | | Betula glandulosa Michx. | Glandular birch, dwarf birch | Bouleau glanduleux | Betulaceae | Shrub |
| | Betula lenta L. | Black birch | Bouleau flexible, merisier rouge | Betulaceae | Tree |
| | Betula nana L. | Bog birch, dwarf birch, glandular birch | Boleau nain, bouleau de savane | Betulaceae | Shrub |
| | Betula nana L. ssp. exilis (Sukaczev) Hultén Syn.: B. exilis Sukaczev | Dwafr birch | Bouleau grêle | Betulaceae | Shrub |
| | Betula neoalaskana Sarg. | Alaska paper birch, white birch | Bouleau d'Alaska | Betulaceae | Shrub |
| | | Betula nigra L. | Black birch | Bouleau noir | Betulaceae | Tree |
| | Betula papyrifera Marsh. | Paper birch, white birch | Bouleau à papier, bouleau blanc | Betulaceae | Tree |
| | | Betula pubescens Ehrh.Syn.: B. alba L. | Downy birch | Bouleau pubescent | Betulaceae | Tree |
| | Betula pumila L. var. glandulifera Regel. Syn: B. glandulifera (Regel) Butler | Low birch | Bouleau glandulifère | Betulaceae | Tree |
| | Boschniakia rossica (Cham. & Schltdl.) Fedtsch. | Northern groundcone | Boschniakie de Russie | Orobanchaceae | Herb |
| | Botrychium virginianum (L.) Sw. | Rattlesnake fern, Virginia grape fern | Botryche de Virginie | Ophioglossaceae | Herb |
| | | Brassica sp. | Mustard | Moutarde | Brassicaceae | Herb |
| | Calla palustris L. | Water arum | Calla des marais | Araceae | Herb |
| | Caltha palustris L. | Marsh marigold | Populage des marais | Ranunculaceae | Herb |
| | | Calvatia craniiformis Schw. | Giant puffball | Vesse-de-loup crâniforme | Lycoperdaceae | Fungi |
| | Campanula rotundifolia L. | Harebell, bluebell | Campanule à feuilles rondes | Campanulaceae | Herb |
| | Capsella bursa-pastoris (L.) Medik. | Shepherd's purse | Capselle bourse-à-pasteur | Brassicaceae | Herb |
| | | Cardamine diphylla (Michx.) Alph. Wood Syn.: Dentaria diphylla Michx. | Toothwort, pepper-root | Dentaire à deux feuilles, snicroûte, carcajou | Brassicaceae | Herb |
| | Carex aquatilis Wahlenb. | Sedge | Carex aquatique | Cyperaceae | Herb |
| | Carum carvi L. | Caraway | Carvi commun, anis | Apiaceae | Herb |
| | Carya cordiformis (Wangenh.) K. Koch | Bitternut hickory | Caryer cordiforme, noyer amer | Juglandaceae | Tree |
| | | Carya laciniosa (Michx. f.) G. Don | Shellbark hickory | Caryer lacinié | Juglandaceae | Tree |
| | Carya ovata (Mill.) K. Koch Syn: Hicoria alba Britton | Shagbark hickory | Caryer ovale, noyer tendre | Juglandaceae | Tree |
| | Castilleja coccinea (L.) Spreng. | Scarlet paintbrush, Indian paintbrush | Castilléjie écarlate | Scrophulariaceae | Herb |
| | Castilleja miniata Dougl. Ex Hook. | Great red paintbrush, Indian paintbrush, painted-cup | Castilléjie rougeâtre | Scrophulariaceae | Herb |
| | Caulophyllum thalictroides (L.) Michx. | Blue cohosh | Caulophylle faux-pigamon | Berberidaceae | Herb |
| | Ceanothus americanus L. | New Jersey tea | Céanothus d'Amérique | Rhamnaceae | Shrub |
| | Ceanothus herbaceus Raf. Syn.: C. ovatus auct. non Desf. | New Jersey tea | Céanothus à feuilles ovées | Rhamnaceae | Shrub |
| | Celastrus scandens L. | Bitter-sweet | Célastre grimpant, bourreau des arbres | Celastraceae | Vine |
| | | Cetraria islandica (L.) Ach. | Lichen | Lichen d'Islande | Parmeliaceae | Lichen |
| | | Chamaecyparis thyoides (L.) BSP Syn.: Cupressus thyoides L. | White cedar | Cèdre blanc de l'Atlantique | Cupressaceae | Tree |
| | Chamaedaphne calyculata (L.) Moench Syn.: Cassandra calyculata (L.) D. Don. | Leatherleaf | Faux bleuet, cassandre caliculé | Ericaceae | Shrub |
| | Chamerion angustifolium (L.) Holub ssp. angustifolium Syn.: Epilobium angustifolium L. | Fireweed, willow herb | épilobe à feuilles étroites, bouquets rouges | Onagraceae | Herb |
| | Chamerion latifolium (L.) Holub Syn.: Epilobium latifolium L. | River beauty, dwarf fireweed | épilobe à feuilles larges | Onagraceae | Herb |
| | Chelone glabra L. | White turtle head | Tête de tortue, galane glâbre | Scrophulariaceae | Herb |
| | Chenopodium album L. | Lamb's quarters | Chénopode blanc, chou gras | Chenopodiaceae | Herb |
| | | Chenopodium ambrosioides L. | American wormseed | Chénopode fausse-ambroisie | Chenopodiaceae | Herb |
| | Chimaphila umbellata (L.) W. Bartram | Prince's pine, pipsissewa | Chimaphile à ombelles, herbe à peigne | Pyrolaceae | Herb |
| | | Cicuta douglasii (DC.) J.M. Coult. & Rose | Douglas' water-hemlock, western water-hemlock | Cicutaire pourpre | Apiaceae | Herb |
| | Cicuta maculata L. | Waterhemlock | Cicutaire maculée, carotte à Moreau | Apiaceae | Herb |
| | Cirsium arvense (L.) Scop. | Canada thistle | Chardon des champs | Asteraceae | Herb |
| | Cirsium discolor (Muhl. ex Willd.) Spreng. | Common thistle | Chardon discolore | Asteraceae | Herb |
| | | Cirsium sp. | Thistle | Chardon | Asteraceae | Herb |
| | Cirsium vulgare (Savi) Ten. Syn.: C. lanceolatum (L.) Hill | Common thistle | Chardon vulgaire, piqueux | Asteraceae | Herb |
| | | Cladina rangiferina (L.) Nyl. | Greygreen reindeer lichen | Lichen à caribou, mousse à caribou | Cladoniaceae | Lichen |
| | | Cladina stellaris (Opiz) Brodo Syn.: C. alpestris (L.) Rabenh.; Cladonia stellaris (Opiz) Pouzar & Vezda | Reindeer lichen | Lichen à caribou, mousse à caribou | Cladoniaceae | Lichen |
| | Clintonia borealis (Aiton) Raf. | Corn-lily, bluebead lily | Clintonie boréale | Liliaceae | Herb |
| | Clintonia uniflora (Menzies ex Schult. & Schult. f.) Kunth Syn.: Smilacina borealis (Aiton) Raf. | Single-flowered clintonia, Queens cup, bride's bonnet | Clintonie uniflore | Liliaceae | Herb |
| | Comarum palustre L. Syn.: Potentilla palustris (L.) Scop. | Marsh five-finger | Potentille palustre | Rosaceae | Herb |
| | Comptonia peregrina (L.) J.M. Coult. Syn.: Myrica asplenifolia L. | Sweet fern, ant wood | Comptonie voyageuse | Myricaceae | Shrub |
| | | Conioselinum chinense (L.) Britton, Sterns & Poggenb. | Chinese hemlockparsley | Coniosélinum de Genesee | Apiaceae | Herb |
| | Coptis trifolia (L.) Salisb. Syn.: C. groenlandica (Oeder) Fernald | Golden thread | Coptide du Groenland, savoyane | Ranunculaceae | Herb |
| | Cornus alternifolia L. f. | Dogwood | Cornouiller à feuilles alternes | Cornaceae | Tree |
| | Cornus canadensis L. | Bunch berry, dogwood, dwarf cornel, pigeonberry | Cornouiller du Canada, quatre-temps, rougets | Cornaceae | Shrub |
| | Cornus florida L. | Flowering dogwood | Cornouiller fleuri | Cornaceae | Tree |
| | | Cornus foemina Mill. Syn.: C. stricta Lam. | Stiff dogwood | | Cornaceae | Shrub |
| | Cornus racemosa Lam. Syn.: C. paniculata L'Hér. | Panicled dogwood | Cornouiller à grappes | Cornaceae | Shrub |
| | | Cornus sericea L. Syn.: C. stolonifera Michx | Red-osier dogwood, red willow | Cornouiller stolonifère, hart rouge | Cornaceae | Shrub |
| | | Cornus sp. | Willow, dogwood | Cornouiller | Cornaceae | Shrub |
| | Corydalis aurea Willd. | Golden corydalis | Corydale dorée | Fumariaceae | Herb |
| | Corylus americana Walt. | American hazelnut | Noisetier d'Amérique | Betulaceae | Shrub |
| | Corylus cornuta Marsh. Syn : C. rostrata Ait. | Beaked hazelnut | Noisetier à long bec | Betulaceae | Tree |
| | | Crataegus sp. | Hawthorn | Aubépine | Rosaceae | Tree |
| | | Cucurbita maxima Duchesne | Squash | Courge | Cucurbitaceae | Vine |
| | Cynoglossum virginianum L. var. boreale (Fernald) Cooperr. Syn.: C. boreale Fernald | Hound's tongue | Cynoglosse boréal | Boraginaceae | Herb |
| | Cypripedium acaule Aiton | Lady'slipper, moccasin flower, nerve root | Cypripède acaule, sabot de la vierge | Orchidaceae | Herb |
| | Cypripedium parviflorum Salisb. | Ladyslipper | Cypripède jaune | Orchidaceae | Herb |
| | Cypripedium reginae Walter | Showy lady's slipper | Cypripède royal | Orchidaceae | Herb |
| | | Dactylorhiza viridis (L.) R.M. Bateman, A.M. Pridgeon & M.W. Chase Syn.: Habenaria bracteata (Muhl. ex Willd.) R. Br. | Rein orchis | Habénaire à longues bractées | Orchidaceae | Herb |
| | Dalea purpurea Vent. Syn.: Petalostemon purpureus (Vent.) Rydb. | Purple prairie-clover | Dalée violette | Fabaceae | Herb |
| | Dasiphora fruticosa (L.) Rydb. ssp. floribunda (Pursh) Kartesz Syn.: Potentilla fruticosa auct. non L. | Shrubby cinquefoil | Potentille frutescente | Rosaceae | Shrub |
| | Delphinium glaucum S. Watson | Tall larkspur | Pied-d'alouette glauque | Ranunculaceae | Herb |
| | | Diervilla lonicera Mill. | Bush honeysuckle | Dièreville chèvrefeuille, herbe bleue | Caprifoliaceae | Shrub |
| | Dirca palustris L. | Moosewood, leatherwood, wicopy, rope-bark | Dirca des marais, bois de plomb | Thymelaceae | Shrub |
| | Dryopteris carthusiana (Vill.) H. P. Fuchs | Spinulose shield fern | Dryoptère spinuleuse | Dryopteridaceae | Herb |
| | Dryopteris expansa (C. Presl) Fraser-Jenkins & Jermy | Spreading wood fern | Dryoptère dressée | Dryopteridaceae | Herb |
| | Dryopteris marginalis (L.) A. Gray | Marginal shield fern | Dryoptère à sores marginaux, dryoptéride marginale | Dryopteridaceae | Herb |
| | | Dryopteris sp. | Fern | Dryoptère, dryoptéride | Dryopteridaceae | Herb |
| | | Echinocystis lobata (Michx.) Torr. & A. Gray | Wild balsam-apple | échinocystis lobé, concombre sauvage | Cucurbitaceae | Vine |
| | | Echinodontium tinctorium (Ellis & Ev.) Ellis & Ev. | Indian paint fungus | Carie brune filandreuse | Echinodontiaceae | Fungi |
| | Empetrum nigrum L. | Crowberry, curlewberry | Camarine noire, graines noires | Empetraceae | Shrub |
| | Epigaea repens L. | Trailing arbutus, mayflower | épigée rampante, fleur de mai | Ericaceae | Shrub |
| | Equisetum arvense L. | Horsetail | Prêle des champs, queue de renard | Equisetaceae | Herb |
| | Equisetum hyemale L. | Scouring rush, horsetail | Prêle d'hiver | Equisetaceae | Herb |
| | Equisetum palustre L. | Marsh horsetail | Prêle des marais | Equisetaceae | Herb |
| | Equisetum pratense Ehrh | Common horsetail | Prêle des prés | Equisetaceae | Herb |
| | Equisetum sylvaticum L. | Horsetail | Prêle des bois | Equisetaceae | Herb |
| | Erigeron canadensis L. | Canadian horseweed | érigéron du Canada | Asteraceae | Herb |
| | Erigeron philadelphicus L. | Philadelphia fleabane | érigéron de Philadelphie | Asteraceae | Herb |
| | | Erigeron sp. | Canada fleabane | érigeron | Asteraceae | Herb |
| | Erigeron strigosus Muhl. ex Willd. Syn.: E. ramosus (Walt.) BSP | Daisy fleahane | érigéron hispide | Asteraceae | Herb |
| | | Eriophorum sp. | Cotton grass | Linaigrette | Cyperaceae | Herb |
| | Eryngium aquaticum L. | Button snakeroot | Panicaut aquatique | Apiaceae | Herb |
| | Erysimum cheiranthoides L. | Wormseed mustard | Vélar giroflée, herbe au chantre | Cruciferea | Herb |
| | | Eupatorium maculatum L. | Joe-pye-weed | Eupatoire maculée | Asteraceae | Herb |
| | Eupatorium perfoliatum L. | Thoroughwort, common boneset | Eupatoire perfoliée, herbe à souder | Asteraceae | Herb |
| | | Eupatorium purpureum L. | Joe-pye weed | Eupatoire pourpre | Asteraceae | Herb |
| | Euphorbia corollata L. | Flowering spurge | Euphorbe pétaloïde | Euphorbiaceae | Herb |
| | | Euphorbia sp. | Spurge | Euphorbe | Euphorbiaceae | Herb |
| | Eurybia macrophylla (L.) Cass. Syn.: Aster macrophyllus L. | Large-leaved aster | Aster à grandes feuilles, pétouane | Asteraceae | Herb |
| | Euthamia graminifolia (L.) Nutt. Syn.: Solidago graminifolia (L.) Salisb. | Grass leaf goldenrod | Verge d'or graminifoliée | Asteraceae | Herb |
| | | Evernia mesomorpha Nyl. | Spruce moss | | Parmeliaceae | Lichen |
| | Fagus grandifolia Ehrh. | Beech | Hêtre à grandes feuilles | Fagaceae | Tree |
| | | Fomes fomentarius (L. Ex Fries) J. Kickx f. | Tinder fungus | Amadouvier | Polyporaceae | Fungi |
| | | Fomes officinalis | Agarikon | Polypore officinal | Polyporaceae | Fungi |
| | | Fomes pinicola (Swartz) Cooke | Pinicola brown crumbly rot | Polypore marginé, amadouvier des pins | Polyporaceae | Fungi |
| | Fragaria vesca L. ssp. bracteata (A. Heller) Staudt Syn.: F. bracteata A. Heller | Woodland strawberry | Fraisier | Rosaceae | Herb |
| | | Fragaria virginiana Duchesne ssp. glauca (S. Watson) Staudt | Smooth wild strawberry, Virginia strawberry | Fraisier glauque | Rosaceae | Herb |
| | | Fragaria virginiana Duchesne. | Wild strawberry | Fraisier des champs | Rosaceae | Herb |
| | Fraxinus americana L. | Yellow ash | Frêne d'Amérique, frêne blanc | Oleaceae | Tree |
| | Fraxinus nigra Marsh. | Black or water ash | Frêne noir, frêne gras | Oleaceae | Tree |
| | Fraxinus pennsylvanica Marsh. | Red ash | Frêne de Pennsylvanie, frêne rouge | Oleaceae | Tree |
| | | Fraxinus sp. | Ash | Frêne | Oleaceae | Tree |
| | Galeopsis tetrahit L. | Hemp nettle | Galéopside à tige carrée | Lamiaceae | Herb |
| | Galium aparine L. | Goose grass | Gaillet gratteron | Rubiaceae | Herb |
| | Galium boreale L. | Northern bedstraw | Gaillet boréal | Rubiaceae | Herb |
| | Galium tinctorium (L.) Scop. | Small cleaver | Gaillet des teinturiers | Rubiaceae | Herb |
| | Galium trifidum L. | Small bedstraw | Gaillet trifide | Rubiaceae | Vine |
| | Gaultheria hispidula (L.) Muhl. ex Bigelow | Creeping snowberry, moxieplum | Petit thé | Ericaceae | Shrub |
| | Gaultheria procumbens L. | Teaberry, checkerberry, wintergreen | Thé des bois, gaulthérie couchée | Ericaceae | Shrub |
| | Geocaulon lividum (Richardson) Fernald Syn.: Comandra lividum Richardson | Northern comandra, false toadflax | Comandre livide | Santalaceae | Herb |
| | Geranium maculatum L. | Wild geranium, cranesbill | Géranium maculé | Geraniaceae | Herb |
| | Geum aleppicum Jacq. Syn.: G. strictum Aiton | Alep avens | Benoîte d'Alep | Rosaceae | Herb |
| | Geum canadense Jacq. | White avens, Canada avens | Benoîte du Canada | Rosaceae | Herb |
| | Geum macrophyllum Willd. | Large-leaved avens | Benoîte à grande feuilles | Rosaceae | Herb |
| | Geum rivale L. | Water avens, chocolate root | Benoîte des ruisseaux | Rosaceae | Herb |
| | Geum triflorum Pursh Syn.: Sieversia ciliata (Pursh) G. Don | Prairie smoke | Benoîte à trois fleurs | Rosaceae | Herb |
| | | Glyceria canadensis (Michx.) Trin. | Rattlesnake grass, Canada managrass | Glycérie du Canada | Poaceae | Herb |
| | | Gnaphalium sp. | Cudweed | Gnaphale | Asteraceae | Herb |
| | Grindelia squarrosa (Pursh) Dunal. | Curly-cup gumweed | Herbe à gomme commune | Asteraceae | Herb |
| | Gymnocarpium disjunctum (Rupr.) Chin Syn.: Dryopteris disjuncta (Rupr.) Morton | Oak fern | Dryoptéride disjointe | Dryopteridaceae | Herb |
| | Gymnocarpium dryopteris (L.) Newman Syn.: Dryopteris linnaeana C. Chr. | Western oak fern | Gymnocarpe du chêne | Dryopteridaceae | Herb |
| | Hamamelis virginiana L. | Witch hazel | Hamamélis de Virginie, café du diable | Hamamelidaceae | Tree |
| | Hedysarum alpinum L. Syn.: H. alpinum L. ssp. americanum (Michx.) Fedtsch. | Alpine hedysarum, bear root, Indian carrots | Sainfoin alpin | Fabaceae | Herb |
| | | Helenium autumnale L. Asteraceae, Herb Syn: Helenium autumnale L. var. montanum (Nutt.) Fernald | Sneezeweed, swamp sunflower | Hélénie automnale | Asteraceae | Herb |
| | | Helianthus occidentalis Riddell | Sunflower | Hélianthe de l'Ouest | Asteraceae | Herb |
| | Heliopsis helianthoides (L.) Sweet var. scabra (Dunal) Fernald Syn.: H. scabra Dunal | Ox-eye-daisy, false sunflower | Héliopsis faux-hélianthe | Asteraceae | Herb |
| | | Hepatica nobilis Schreb. var. obtusa (Pursh) Steyerm. Syn.: H. americana (DC.) Ker Gawl. | Hepatica, American liverleaf | Hépatique d'Amérique | Ranunculaceae | Herb |
| | | Hepatica triloba Chaix. | Hepatica | Hépatique trilobée | Ranunculaceae | Herb |
| | | Heracleum maximum Bartram Syn.: H. lanatum Michx. | Cow parsnip, indian rhubarb | Berce très grande | Apiaceae | Herb |
| | Heuchera richardsonii R. Br. | Richardson's alumroot | Heuchère de Richardson | Saxifragaceae | Herb |
| | | Hierochloe odorata (L.) Beauv. | Sweet-grass, vanilla grass | Hiérochloé odorante, foin d'odeur, herbe sainte | Poaceae | Herb |
| | Hordeum jubatum L. | Squirrel-tail | Orge agréable | Poaceae | Herb |
| | Hudsonia tomentosa Nutt. | Ground berry, woolly hudsonia | Hudsonie tomenteuse | Cestaceae | Shrub |
| | Humulus lupulus L. | Hop | Houblon commun | Cannabaceae | Vine |
| | Hydrophyllum virginianum L. | Eastern waterleaf | Hydrophylle de Virginie | Hydrophyllaceae | Herb |
| | Hylotelephium telephium (L.) H. Ohba ssp. telephium Syn.: Sedum telephium L. | Garden stonecrop, live-forever | Orpin pourpre | Crassulaceae | Herb |
| | Hymenoxys richardsonii (Hook.) Cockerell. | Richardon's bitterweed, Colorado rubber-plant | Hymenoxys de Richardson | Asteraceae | Herb |
| | Hypericum perforatum L. | St. John's wort | Millepertuis commun | Clusiaceae | Herb |
| | | Ilex mucronata (L.) Powell, Savolainen & Andrews Syn.: Nemopanthus mucronatus (L.) Loes. | Mountain holly | Faux houx, némopanthe mucroné | Aquifoliaceae | Tree |
| | Ilex verticillata (L.) Gray | Winterberry | Houx verticillé | Aquifoliaceae | Tree |
| | Impatiens capensis Meerb. Syn.: I. biflora Walter | Spotted jewelweed, Cape touch-me-not | Impatiente du Cap | Balsaminaceae | Herb |
| | Impatiens pallida Nutt. | Pale jewelweed, pale touch-me-not | Impatiente pâle | Balsaminaceae | Herb |
| | | Inonotus obliquus (Ach. Ex Pers.) Pil. | Tinder fungus | Polypore oblique | Hymenochaetaceae | Fungi |
| | Inula helenium L. | Elecampane | | Asteraceae | Herb |
| | Iris versicolor L. | Muskrat, blue flag | Iris versicolore | Iridaceae | Herb |
| | Juglans cinerea L. | Butternut | Noyer cendré | Juglandaceae | Tree |
| | Juniperus communis L. | Juniper | Genévrier commun, genièvre | Cupressaceae | Tree |
| | Juniperus horizontalis Moench. | Creeping juniper, rocky mountain juniper | Genévrier horizontal | Cupressaceae | Shrub |
| | Juniperus virginiana L. | Red cedar | Genévrier de Virginie | Cupressaceae | Tree |
| | Kalmia angustifolia L. | Lambkill, sheep laurel | Kalmia à feuilles étroites, crevard de moutons | Ericaceae | Shrub |
| | Kalmia latifolia L. | Mountain laurel | Kalmia à feuilles larges | Ericaceae | Tree |
| | Kalmia polifolia Wangenh. | Pale bog laurel | Kalmia à feuilles d'andromède | Ericaceae | Shrub |
| | Lactuca biennis (Moench) Fernald Syn.: L. spicata (Lam.) Hitchc. | Tall lettuce, blue lettuce | Laitue bisannuelle | Asteraceae | Herb |
| | Lactuca canadensis L. | Wild lettuce, Canada lettuce | Laitue du Canada | Asteraceae | Herb |
| | Laportea canadensis (L.) Weddell | Wood nettle, Canada nettle | Laportéa du Canada, ortie du Canada | Urticaceae | Herb |
| | Lappula squarrosa (Retz.) Dumort. | Stickweed | Bardanette | Boraginaceae | Herb |
| | Larix laricina (Du Roi) K. Koch | Tamarack, larch | Mélèze laricin, épinette rouge | Pinaceae | Tree |
| | | Lasallia papulosa (Ach.) Llano Syn.: Umbilicaria papulosa (Ach.) Nyl. | Rock tripe | Tripes-de-roches | Umbilicariaceae | Lichen |
| | Lathyrus ochroleucus Hook. | Creamy vetchling, pale vetchling | Gesse jaunâtre | Fabaceae | Vine |
| | Lathyrus venosus Muhl. ex Willd. | Veiny vetchling, wild pea | Gesse veinée | Fabaceae | Herb |
| | Lepidium virginicum L. | Wild peppergrass | Lépidie de Virginie | Brassicaceae | Herb |
| | Leucanthemum vulgare Lam. Syn.: Chrysanthemum leucanthemum L. | Ox-eye daisy | Chrysanthème leucanthème, marguerite | Asteraceae | Herb |
| | Leymus mollis (Trin.) Pilg. | Sea limegrass, American dunegrass | Seigle de mer | Poaceae | Herb |
| | Lilium canadense L. | Canada lily, wild yellow lily | Lis du Canada | Liliaceae | Herb |
| | Lilium philadelphicum L. | Orange-red lily, Philadelphia lily | Lis de Philadelphie | Liliaceae | Herb |
| | Limonium carolinianum (Walter) Britton | Sea lavender | Limonium de Caroline | Plumbaginaceae | Herb |
| | Linaria vulgaris Mill. | Butter and eggs | Linaire vulgaire | Scrophulariaceae | Herb |
| | Linnaea borealis L. | Twin flower | Linnée boréale | Caprifoliaceae | Herb |
| | Lobelia inflata L. | Indian tobacco | Lobélie gonflée | Campanulaceae | Herb |
| | Lobelia kalmii L. | Ontario lobelia, Kalm's lobelia | Lobélie de Kalm | Campanulaceae | Herb |
| | Lonicera canadensis Bartram ex Marsh. | American fly honeysuckle | Chèvrefeuille du Canada | Caprifoliaceae | Shrub |
| | Lonicera dioica L. Syn.: L. dioica L. var. glaucescens (Rydb.) Butters | Glaucous honeysuckle, limber honeysuckle | Chèvrefeuille dioïque | Caprifoliaceae | Vine |
| | | Lonicera involucrata (Richardson) Banks ex Spreng. | Black twinberry, twinflower, honeysuckle | Chèvrefeuille involucré | Caprifoliaceae | Shrub |
| | | Lycoperdon perlatum Pers. | Puffball fungus | Vesse-de-loup perlée | Agaricaceae | Fungi |
| | | Lycoperdon sp. | Puffball | Vesse-de-loup | Agaricaceae | Fungi |
| | Lycopodium clavatum L. | Stag's horn, common club-moss | Lycopode claviforme, courants verts | Lycopodiaceae | Herb |
| | | Lycopodium dendroideum Michx. | Round-branched tree-clubmoss, ground pine, bear paw | Lycopode dendroïde | Lycopodiaceae | Herb |
| | Lycopodium obscurum L. | Ground pine | Lycopode foncé | Lycopodiaceae | Herb |
| | | Lycopodium sp. | Club-moss, ground pine | Lycopode | Lycopodiaceae | Herb |
| | Lysichiton americanus Hultén & H. St. John Syn.: L. camtschatcensis auct. non (L.) Schott | Yellow skunk cabbage | Lysichiton d'Amérique | Araceae | Herb |
| | Maianthemum canadense Desf. | Wild lily-of-the-valley, squirrel berry | Maïanthème du Canada, petit muguet | Liliaceae | Herb |
| | Maianthemum racemosum (L.) Link ssp. racemosum Syn.: Smilacina racemosa (L.) Desf.; Vagnera racemosa (L.) Morong | False spikenard, false Solomon's seal | Smilacine à grappes | Liliaceae | Herb |
| | Maianthemum stellatum (L.) Link Syn.: Smilacina stellata (L.) Desf. | Star-flowered solomon's seal | Smilacine étoilée | Liliaceae | Herb |
| | | Malaxis unifolia Michx. Syn.: Microstylis unifolia (Michx.) BSP | Green Adder's mouth | Malaxis unifolié | Orchidaceae | Herb |
| | | Matricaria discoidea DC.Syn.: Matricaria matricarioides auct. non (Less.) Porter | Pineapple weed, chamomile | Matricaire odorante, herbe à crapaud | Asteraceae | Herb |
| | Matteuccia struthiopteris (L.) Todaro. | Fiddlehead fern, ostrich fern | Matteucie fougère-à-l'autruche | Dryopteridaceae | Herb |
| | Medicago sativa L. | Alfalfa, lucerne | Luzerne, lentine | Fabaceae | Herb |
| | Melampyrum lineare Desr. | Narrow-leaved cow-wheat | Mélampyre linéaire | Scrophulariaceae | Herb |
| | Melilotus officinalis (L.) Lam. Syn.: M. albus Medik. | Yellow sweet-clover | Mélilot jaune, mélilot officinal, trèfle d'odeur jaune | Fabaceae | Herb |
| | Menispermum canadense L. | Canada moonseed | Ménisperme du Canada | Menispermaceae | Vine |
| | Mentha aquatica L. Syn.: M. piperita L. | Peppermint | Menthe poivrée | Lamiaceae | Herb |
| | Mentha arvensis L. Syn.: M. canadensis L. | Wild mint | Mente sauvage, baume | Lamiaceae | Herb |
| | Mentha spicata L. Syn.: M. viridis L. | Spearmint | Menthe à épis, baume | Lamiaceae | Herb |
| | Menyanthes trifoliata L. | Buckbean | Ményanthe trifolié, herbe à canards | Menyanthaceae | Herb |
| | Mertensia paniculata (Aiton) G. Don | Lungwort, tall bluebells | Mertensie paniculée | Boraginaceae | Herb |
| | | Mirabilis nyctaginea (Michx.) MacMill. Syn.: Oxybaphus nyctagineus (Michx.) Sweet; Allionia nyctaginea Michx. | Heart-leaved four-o'clock, heart-leaved umbrellawort | Nyctage parasol | Nyctaginaceae | Herb |
| | Mitchella repens L. | Two-eyed Berry, creeper partridge-berry | Mitchella rampant, pain de perdrix | Rubiaceae | Herb |
| | Mitella nuda L. | Bishop's cap, naked mitrewort | Mitrelle nue | Saxifragaceae | Herb |
| | Monarda fistulosa L. | Wild bergamot, horse mint | Monarde fistuleuse, menthe de cheval | Lamiaceae | Herb |
| | Monarda punctata L. | Spotted beebalm | Monarde ponctuée | Lamiaceae | Herb |
| | Moneses uniflora (L.) A. Gray | Single delight, one-flowered wintergreen | Monésès uniflore | Pyrolaceae | Herb |
| | Monotropa uniflora L. | Indian pipe | Monotrope uniflore | Monotropaceae | Herb |
| | Morella pensylvanica (Mirb.) Kartesz | Northern bayberry | Myrique de Pennsylvanie | Myricaceae | Tree |
| | Myrica gale L. | Sweet gale | Myrique baumier | Myricaceae | Shrub |
| | | Myriosclerotinia caricis-ampullaceae (Nyberg) Buch. Syn.: Sclerotinia caricis-ampullaceae Nyberg | | | Sclerotiniaceae | Fungi |
| | Nepeta cataria L. | Catnip | Népéta cataire, herbe à chats | Lamiaceae | Herb |
| | Nicotiana tabacum L. | Tobacco | Tabac | Solanaceae | Shrub |
| | | Nuphar lutea (L.) Sm Syn.: N.variegata Durand | Variegated pond-lily, cow lily, yellow pond lily | Nénuphar à fleurs panachées, grand nénuphar jaune, pied-de-cheval | Nymphaeaceae | Herb |
| | | Nuphar lutea (L.) Sm. ssp. advena (Aiton) Kartesz & Gandhi Syn.: N. advena (Aiton) W.T. Aiton | Cow lily | Nénuphar à feuilles émergentes | Nymphaeaceae | Herb |
| | | Nuphar lutea (L.) Sm. ssp. polysepala (Engelm.) E.O. Beal Syn.: N. polysepala (Engelm.) Greene, N. advena Aiton | Rocky mountain pond-lily, yellow water lily | Nénuphar à sépales nombreux | Nymphaeaceae | Herb |
| | | Nuphar sp. | Yellow pond-lily | Nénuphar | Nymphaeaceae | Herb |
| | Nymphaea odorata Aiton Syn.: Castalia odorata (Aiton) Alph. Wood | American white water lily, sweet scented water lily | Nymphéa odorant, nénuphar blanc, lis d'eau | Nymphaeaceae | Herb |
| | Oclemena nemoralis (Aiton) Greene Syn.: Aster nemoralis Aiton | Bog aster | Aster des bois | Asteraceae | Herb |
| | Oenothera biennis L. | Mink plant | Onagre | Onagraceae | Herb |
| | | Oligoneuron rigidum (L.) Small var. rigidum Syn: Solidago rigida L. | Goldenrod | | Asteraceae | Herb |
| | Onoclea sensibilis L. | Sensitive fern | Onoclée sensible | Dryopteridaceae | Herb |
| | Oplopanax horridus (Sm.) Miq. Syn.: Echinopanax horridus (Sm.) Decne. & Planch. ex Harms | Devil's club | Bois piquant | Araliaceae | Shrub |
| | Orthilia secunda (L.) House Syn.: Pyrola secunda L. | One-sided wintergreen | Pyrole unilatérale | Pyrolaceae | Herb |
| | | Osmorhiza claytonii (Michx.) C.B. Clarke | Hairy sweet cicely | Osmorhize de Clayton | Apiaceae | Herb |
| | Osmorhiza longistylis (Torr.) DC. | Long-styled sweet cicely | Osmorhize à long style | Apiaceae | Herb |
| | Ostrya virginiana (Mill.) K. Koch | Hophornbeam | Ostryer de virginie, bois de fer | Betulaceae | Tree |
| | Oxalis montana Raf. | Wood sorrel | Oxalide de montagne | Oxalidaceae | Herb |
| | Packera aurea (L.) A. Löve & D. Löve Syn.: Senecio aureus L. | Golden ragwort, golden senecio | Séneçon doré | Asteraceae | Herb |
| | Panax quinquefolius L. | Ginseng | Ginseng à cinq folioles, ginseng | Araliaceae | Herb |
| | Panax trifolius L. Syn.: Aralia trifolia Gray | Dwarf ginseng | Ginseng à trois folioles, petit ginseng | Araliaceae | Herb |
| | | Parmelia sulcata Taylor. | Shield lichen | | Parmeliaceae | Lichen |
| | Pastinaca sativa L. | Wild parsnip | Panais | Apiaceae | Herb |
| | Pedicularis canadensis L. | Wood beteny, Canada pedicularis | Pédiculaire du Canada | Scrophulariaceae | Herb |
| | | Pedicularis lanata Cham. & Schltdl. | Woolly lousewort | Pédiculaire laineuse | Scrophulariaceae | Herb |
| | Penstemon confertus Douglas ex Lindl. | Lesser yellow beardtongue | Penstémon à fleurs jaunes | Scrophulariaceae | Herb |
| | Petasites frigidus (L.) Fr. var. palmatus (Aiton) Cronquist Syn. : P. palmatus (Aiton) A. Gray | Palmate coltsfoot | Pétasite palmé | Asteraceae | Herb |
| | Petasites frigidus (L.) Fr. var. sagittatus (Banks ex Pursh) Cherniawsky Syn.: P. sagittatus (Banks ex Pursh) A. Gray | Arrow-leaved coltsfoot | Pétasite sagitté | Asteraceae | Herb |
| | Phryma leptostachya L. | Lopseed | Phryma à épis grêles | Verbenaceae | Herb |
| | Physocarpus opulifolius (L.) Maxim. | Ninebark | Physocarpus à feuilles d'obier, bois à sept écorces | Rosaceae | Shrub |
| | Phytolacca americana L. | American pokeweed, pigeon berry | Phytolaque d'Amérique | Phytolaccaceae | Herb |
| | Phytolacca americana L. var. americana Syn.: P. decandra L. | Common pokeweed, poke berry | Phytolaque d'Amérique | Phytolaccaceae | Herb |
| | Picea glauca (Moench) Voss Syn.: P. canadensis (Mill.) BSP. | White spruce | épinette blanche | Pinaceae | Tree |
| | Picea mariana (Mill.) BSP. | Black spruce | épinette noire | Pinaceae | Tree |
| | Picea rubens Sarg. | Red spruce | épinette rouge | Pinaceae | Tree |
| | Picea sitchensis (Bong.) Carrière | Sitka spruce, tideland spruce | épinette de Sitka | Pinaceae | Tree |
| | | Picea sp. | Spruce | épinette | Pinaceae | Tree |
| | Pinus banksiana Lamb. | Jack pine | Pin gris | Pinaceae | Tree |
| | Pinus contorta Douglas ex Louden | Lodgepole pine | Pin tordu | Pinaceae | Tree |
| | | Pinus resinosa Aiton | Red pine | Pin rouge | Pinaceae | Tree |
| | | Pinus sp. | Pine | Pin | Pinaceae | Tree |
| | Pinus strobus L. | White pine | Pin blanc | Pinaceae | Tree |
| | Plantago major L. | Common plantain, whiteman's foot | Plantain majeur, grand plantain queue de rat | Plantaginaceae | Herb |
| | Platanthera dilatata (Pursh) Lindl. ex Beck var. dilatata | Tall white bog orchid, scentbottle | Platanthère dilatée | Orchidaceae | Herb |
| | Platanthera dilatata (Pursh) Lindl. ex Beck var. leucostachys (Lindl.) Luer Syn.: Habenaria leucostachys (Lindl.) S. Watson | Sierra bog orchid | Platanthère à tige pâle | Orchidaceae | Herb |
| | Platanthera orbiculata (Pursh) Lindl. Syn.: Habenaria orbiculata (Pursh) Torr. | Roundleaved orchis | Habénaire à feuilles orbiculaires | Orchidaceae | Herb |
| | Poa palustris L. | Swamp meadow-grass, fowl bluegrass | Pâturin palustre | Poaceae | Herb |
| | Podophyllum peltatum L. | Mayapple | Podophylle pelté, pomme de mai | Berberidaceae | Herb |
| | Polygala polygama Walter | Milkwort, pink polygala | Polygala polygame | Polygalaceae | Herb |
| | Polygala senega L. | Seneca snakeroot | Sénéca | Polygalaceae | Herb |
| | Polygonatum biflorum (Walter) Elliot | Giant Solomon's seal | Sceau-de-Salomon géant | Liliaceae | Herb |
| | Polygonatum biflorum (Walter) Elliot var. commutatum (Schult. & Schult. f.) Morong Syn.: P. commutatum (Schult. & Schult. f.) A. Dietr. | Giant Solomon's seal | Sceau-de-Salomon géant | Liliaceae | Herb |
| | Polygonatum pubescens (Willd.) Pursh. | Hairy Solomon's seal | Sceau-de-Salomon pubescent | Liliaceae | Herb |
| | | Polygonum amphibium L. | Water smartweed, amphibious knot-weed | Renouée amphibie | Polygonaceae | Herb |
| | | Polygonum hydropiper L. | Marshpepper knotweed, water pepper | Renouée poivre-d'eau | Polygonaceae | Herb |
| | | Polygonum muhlenbergii (Meisn.) Wats. | Long-root smartweed, swamp persicaria | Renouée émergée | Polygonaceae | Herb |
| | | Polygonum pensylvanicum L. | Pennsylvania smartweed | Renouée de Pennsylvanie | Polygonaceae | Herb |
| | | Polygonum persicaria L. | Lady's thumb | Renouée persicaire | Polygonaceae | Herb |
| | | Polygonum punctatum Elliot | Interrupted smartweed | Renouée ponctuée | Polygonaceae | Herb |
| | Polypodium virginianum L. Syn.: P. vulgare auct. non L. p.p. | Rock polypod, parasitic sword fern | Polypode de Virginie, tripe de roche | Polypodiaceae | Herb |
| | | Polyporus resinosus (Schrad.) Fr. | Fungi | Polypore | Polyporaceae | Fungi |
| | | Polyporus sp. | Polypore | Polypore | Polyporaceae | Fungi |
| | | Polystichum acrostichoides (Michx.) Schott | Christmas fern | Polystic faux-acrostic | Dryopteridaceae | Herb |
| | Pontederia cordata L. | Pickerel weed, lake herb | Pontédérie cordée | Pontederiaceae | Herb |
| | Populus alba L. | White poplar | Peuplier blanc | Salicaceae | Tree |
| | Populus balsamifera L. | Balsam poplar, black poplar | Peuplier baumier, peuplier noir, liard | Salicaceae | Tree |
| | Populus deltoides Bartram ex Marsh. ssp. monilifera (Aiton) Eckenwalder Syn.: P. monilifera Aiton | Cottonwood | Peuplier deltoïde | Salicaceae | Tree |
| | Populus grandidentata Michx. | Poplar | Peuplier à grandes dents | Salicaceae | Tree |
| | | Populus sp. | Poplar | Peuplier | Salicaceae | Tree |
| | | Populus tremuloides Michx. | Quaking aspen, trembling aspen | Peuplier faux-tremble, tremble | Salicaceae | Tree |
| | Potentilla anserina L. Syn.: Argentina anserina (L.) Rydb. | Common silverweed | Potentille ansérine | Rosaceae | Herb |
| | | Potentilla arguta Pursh Syn.: Drymocallis arguta (Pursh) Rydb. | Tall cinquefoil | Potentille âcre | Rosaceae | Herb |
| | Potentilla norvegica L. ssp. monspeliensis (L.) Asch. & Graebn. Syn.: P. monspeliensis L. | Norwegian cinquefoil | Potentille de Norvège | Rosaceae | Herb |
| | | Prenanthes alba L. | Lion's foot, white lettuce | Prenanthe blanche | Asteraceae | Herb |
| | Prosartes trachycarpa S. Watson Syn.: Disporum trachycarpum (S. Wats.) Benth. & Hook. f. | Rough-fruited fairybells | Prosartès à fruits rugueux | Liliaceae | Herb |
| | Prunella vulgaris L. | Selfheal, heal-all | Prunelle vulgaire, brunelle, herbe au charpentier | Lamiaceae | Herb |
| | Prunus americana Marsh. | Wild plum | Prunier d'Amérique | Rosaceae | Tree |
| | Prunus nigra Aiton | Canada plum | Prunier noir, prunier sauvage | Rosaceae | Tree |
| | | Prunus pensylvanica L.f. | Pine cherry, bird cherry, fire cherry | Cerisier de Pennsylvanie, petit merisier | Rosaceae | Tree |
| | Prunus serotina Ehrh. | Rum cherry, black cherry | Cersier tardif | Rosaceae | Tree |
| | | Prunus sp. | Red cherry | | Rosaceae | Tree |
| | Prunus virginiana L. | Chokeberry | Cerisier de virginie, cerisier à grappes | Rosaceae | Tree |
| | Prunus virginiana var. demissa (Nuttall) Torrey Syn: Prunus virginiana L. var. melanocarpa (A. Nelson) Sarg. | Western chokecherry, black chokecherry | Cerisier du Pacifique | Rosaceae | Shrub |
| | | Pteris aquilina L. | Brake | Fougère-aigle | Pteridaceae | Herb |
| | | Pteris sp. | Brake | Fougère | Pteridaceae | Herb |
| | | Pulsatilla patens (L.) Mill. ssp. multifida (Pritz.) Zamels Syn.: Anemone patens L., P. hirsutissima (Pursh) Britton | Prairie pasqueflower, cutleaf anemone | Pulsatille multifide | Ranunculaceae | Herb |
| | Pycnanthemum virginianum (L.) T. Dur. & B.D. Jacks. ex B.L. Rob. & Fernald Syn.: Koellia virginiana (L.) MacMill. | Virginia mountainmint | Pycnanthème verticillé | Lamiaceae | Herb |
| | Pyrola asarifolia Michx. | Asarum-leaved wintergreen | Pyrole à feuilles d'asaret | Pyrolaceae | Herb |
| | | Pyrola asarifolia Michx. ssp. asarifolia Syn.: P. uliginosa Torr. & A. Gray ex Torr. | Wintergreen | Pyrole des marais | Pyrolaceae | Shrub |
| | Pyrola elliptica Nutt. | Waxflower shinleaf | Pyrole elliptique | Pyrolaceae | Herb |
| | Pyrola grandiflora Radius | Arctic pyrola, arctic wintergreen | Pyrole à grandes fleurs | Pyrolaceae | Herb |
| | Quercus alba L. | White oak | Chêne blanc | Fagaceae | Tree |
| | | Quercus macrocarpa Michx. | Bur oak | Chêne à gros fruits | Fagaceae | Tree |
| | Quercus rubra L. | Red oak | Chêne rouge | Fagaceae | Tree |
| | Ranunculus acris L. | Buttercup, tall buttercup | Renoncule âcre, bouton d'or | Ranunculaceae | Herb |
| | Rhexia virginica L. | Virginia meadow beauty, vigenar wood | Rhéxie de Virginie | Melastomaceae | Herb |
| | Rhinanthus minor L. | Little yellow rattle | Petit rhinanthe | Scrophulariaceae | Herb |
| | Rhododendron groenlandicum (Oeder) K.A. Kron & W.S. Judd Syn.: Ledum groenlandicum Oeder | Labrador tea, Hudson's Bay tea | Thé du Labrador | Ericaceae | Shrub |
| | Rhododendron tomentosum Harmaja Syn.: Ledum palustre L. ssp. decumbens (Aiton) Hultén | Northern Labrador tea | Petit thé du Labrador | Ericaceae | Shrub |
| | Rhus aromatica Aiton | White sumac, fragrant sumac | Sumac aromatique | Anacardiaceae | Shrub |
| | Rhus copallinum L. | Shining sumac, winged sumac | Sumac brillant | Anacardiaceae | Tree |
| | Rhus glabra L. | Smooth sumac, dwarf sumac | Sumac glabre | Anacardiaceae | Tree |
| | Rhus typhina L. Syn.: R. hirta (L.) Sudw. | Staghorn sumac | Sumac vinaigrier | Anacardiaceae | Tree |
| | Ribes americanum Mill. | Wild black currant, American black currant | Gadellier d'Amérique | Grossulariaceae | Shrub |
| | Ribes glandulosum Grauer | Skunk currant | Gadellier glanduleux | Grossulariaceae | Shrub |
| | Ribes hudsonianum Richardson | Northern black currant | Gadellier de la Baie d'Hudson | Grossulariaceae | Shrub |
| | Ribes lacustre (Pers.) Poir. | Swamp gooseberry | Gadellier lacustre | Grossulariaceae | Shrub |
| | Ribes oxyacanthoides L. | Canada gooseberry | Groseiller du Nord, groseillier hérissé | Grossulariaceae | Shrub |
| | Ribes triste Pall. | Wild red currant | Gadellier amer | Grossulariaceae | Shrub |
| | Rosa acicularis Lindl. | Prickly rose | églantier, rosier aciculaire | Rosaceae | Shrub |
| | Rosa arkansana Porter | Wild prairie rose | Rosier des prairies | Rosaceae | Shrub |
| | Rosa blanda Aiton | Wild rose | Rosier inerme, rosier sauvage, églantier | Rosaceae | Shrub |
| | | Rosa sp. | Wild rose | Rosier sauvage | Rosaceae | Shrub |
| | Rosa virginiana Mill. | Virginia rose, dwarf wild rose | Rosier de Virginie | Rosaceae | Shrub |
| | Rosa woodsii Lindl. | Woods' rose | | Rosaceae | Shrub |
| | Rubus allegheniensis Porter | Wild blackberry | Mûrier, ronce alléghanienne | Rosaceae | Shrub |
| | Rubus chamaemorus L. | Cloud berry | Ronce petit-mûrier, plaquebière, chicoutai | Rosaceae | Herb |
| | | Rubus frondosus Bigelow | Black berry | Ronce de Brainerd | Rosaceae | Herb |
| | Rubus idaeus L. | Raspberry | Framboisier, ronce du mont Ida | Rosaceae | Herb |
| | Rubus idaeus L. ssp. strigosus [Michx.) Focke Syn.: R. strigosus Michx. R. idaeus L. var. melanolasius (Dieck) R.J. Davis | Wild red raspberry | Framboisier sauvage | Rosaceae | Shrub |
| | Rubus occidentalis L. | Wild black raspberry | Ronce occidentale, mûrier | Rosaceae | Herb |
| | Rubus pubescens Raf. var. pubescens Syn.: R. triflorus Richardson | Dwarf raspberry | Ronce pubescente, catherinettes | Rosaceae | Herb |
| | | Rubus sp. | Blackberry | Mûre | Rosaceae | Herb |
| | Rudbeckia laciniata L. | Cutleaf coneflower | Rudbeckie laciniée | Asteraceae | Herb |
| | Rumex altissimus Alph. Wood | Tall dock, pale dock | Patience élevée | Polygonaceae | Herb |
| | | Rumex aquaticus L. | Western dock, yellow dock | Patience occidentale, doche | Polygonaceae | Herb |
| | Rumex arcticus Trautv. | Arctic dock | Patience arctique | Polygonaceae | Herb |
| | Rumex crispus L. | Curled dock | Patience crépue, rumex crépu | Polygonaceae | Herb |
| | Rumex obtusifolius L. | Bitter dock | Patience à feuilles obtuses, rumex à feuilles obtuses | Polygonaceae | Herb |
| | | Rumex orbiculatus A. Gray | Water-dock | Patience orbiculaire, rumex orbiculaire | Polygonaceae | Herb |
| | | Rumex salicifolius Weinm. var. mexicanus (Meisn.) C.L. Hitchc. Syn.: R. mexicanus Meisn. | Narrow-leaved dock | Rumex mexicain | Polygonaceae | Herb |
| | | Rumex sp. | Dock weed | Patience, rumex | Polygonaceae | Herb |
| | | Sagittaria cuneata Sheldon. Syn.: S. arifolia Nutt. ex J.G. Sm. | Arrowhead | Sagittaire cunéaire | Alismataceae | Herb |
| | Sagittaria latifolia Willd. | Arrowhead | Sagittaire latifoliée | Alismataceae | Herb |
| | Salix bebbiana Sarg. | Willow | Saule de Bebb | Salicaceae | Shrub |
| | | Salix candida Flueggé ex Willd. | Hoary willow | Saule tomenteux | Salicaceae | Shrub |
| | | Salix cordata Michx. | Willow | Saule à tête laineuse | Salicaceae | Shrub |
| | Salix discolor Muhl. | Pussy willow | Saule discolor, chatons | Salicaceae | Shrub |
| | Salix fragilis L. | Crack willow | Saule fragile | Salicaceae | Tree |
| | Salix lucida Muhl. | Squaw bush, red willow, shining willow | Saule brilliant | Salicaceae | Tree |
| | Salix nigra Marsh. | Black willow | Saule noir | Salicaceae | Tree |
| | Salix pedicellaris Pursh | Bog willow | Saule pédicellé | Salicaceae | Shrub |
| | Salix planifolia Pursh Syn: Salix planifolia Pursh ssp. planifolia | Tea-leaved willow, diamond-leaved willow, flat-leaved willow | Saule à feuilles planes | Salicaceae | Shrub |
| | | Salix sp. | Willow, osier | Saule | Salicaceae | Tree |
| | Sambucus nigra L. ssp. canadensis (L.) R. Bolli Syn.: S. canadensis L. | Common elder, elderberry | Sureau du Canada, sureau blanc | Caprifoliaceae | Shrub |
| | Sambucus racemosa L. | Red-fruited elder, red elderberry | Sureau rouge, sureau pubescent | Caprifoliaceae | Tree |
| | Sanguinaria canadensis L. | Bloodroot | Sanguinaire du Canada, sang-dragon | Papaveraceae | Herb |
| | Sanguisorba canadensis L. | American great burnet | Sanguisorbe du Canada | Rosaceae | Herb |
| | Sanicula canadensis L. | Canada sanicle, Canada black snakeroot | Sanicle du Canada | Apiaceae | Herb |
| | Sanicula marilandica L. | Black snakeroot | Sanicle du Maryland | Apiaceae | Herb |
| | Sanicula odorata (Raf.) K.M. Pryer & L.R. Phillippe Syn.: S. gregaria E.P. Bicknell | Black snakeroot | Sanicle grégaire | Apiaceae | Herb |
| | Sarracenia purpurea L. | Pitcher plant | Sarracénie pourpre, sabot, oreille de cochon, petits cochons, herbe crapaud | Sarraceniaceae | Herb |
| | Sassafras albidum (Nutt.) Nees Syn.: S. variifolium (Salisb.) Ktze. | Sassafras | Sassafras officinal | Lauraceae | Tree |
| | Saururus cernuus L. | Indian pepper, lizard's tail | Saurure penché | Saururaceae | Herb |
| | Schoenoplectus acutus (Muhl. ex Bigelow) A. Löve & D. Löve Syn.: Scirpus acutus Muhl. ex Bigelow | Bulrush, tule | Scirpe aigu, grand jonc | Cyperaceae | Herb |
| | Scirpus microcarpus J. Presl & C. Presl Syn.: S. rubrotinctus Fernald | Bulrush | Scirpe à graines rouges | Cyperaceae | Herb |
| | Scutellaria galericulata L. | Marsh skullcap | Toque, tertianaire | Lamiaceae | Herb |
| | Scutellaria lateriflora L. | Mad-dog scullcap | Scutellaire latériflore | Lamiaceae | Herb |
| | Shepherdia canadensis (L.) Nutt. Syn.: Lepargyrea canadensis (L.) Greene | Soapberry, buffalo-berry | Shepherdie du Canada, graines de boeuf | Elaeagnaceae | Shrub |
| | Silene latifolia Poir. ssp. alba (Mill.) Greuter & Burdet Syn.: Lychnis alba Mill. | White campion | Lychnis blanc | Caryophyllaceae | Herb |
| | Silphium perfoliatum L. | Cup-plant | Silphe perfolié | Asteraceae | Herb |
| | Sium suave Walter | Water parsnip | Berle douce | Apiaceae | Herb |
| | Smilax herbacea L. | Carrion flower | Smilax herbacé, raisin de couleuvre | Smilacaceae | Vine |
| | Solanum dulcamara L. | Bittersweet | Morelle douce-amère | Solanaceae | Herb |
| | Solanum nigrum L. | Nightshade | Morelle noire | Solanaceae | Herb |
| | Solidago altissima L. | Goldenrod | Verge d'or très élevée | Asteraceae | Herb |
| | Solidago canadensis L. | Goldenrod | Verge d'or du Canada | Asteraceae | Herb |
| | Solidago flexicaulis L. | Goldenrod | Verge d'or à tige zigzaguante | Asteraceae | Herb |
| | Solidago juncea Aiton | Early goldenrod | Verge d'or jonciforme | Asteraceae | Herb |
| | Solidago multiradiata Aiton Syn.: S. virgaurea var. multiradiata (Aiton) Torrey & A. Gray | Multi-rayed goldenrod, mountain goldenrod | Verge d'or à rayons nombreux | Asteraceae | Herb |
| | Solidago speciosa Nutt. var. rigidiuscula Torr. & A. Gray Syn.: S. rigidiuscula (Torr. & A. Gray) Porter | Showy goldenrod | Verge d'or voyante | Asteraceae | Herb |
| | Sorbus americana Marsh. Syn.: Pyrus americana (Marsh.) DC. | American mountain ash, round wood, bear berries | Sorbier d'Amérique, cormier | Rosaceae | Tree |
| | Sorbus decora (Sarg.) C.K. Schneid. | Northern mountain ash | Sorbier plaisant | Rosaceae | Tree |
| | Sorbus scopulina Greene | Greene's mountain-ash | Sorbier de Greene | Rosaceae | Shrub |
| | Sorbus sitchensis M. Roem. | Sitka mountain-ash, western mountain-ash | Sorbier de Sitka | Rosaceae | Shrub |
| | | Sphagnum capillifolium (Ehrh.) Hedw. | Moss | | Sphagnaceae | Moss |
| | | Sphagnum fuscum (Schimp.) Klinggr. | Peat moss | Sphaigne brune | Sphagnaceae | Moss |
| | Spiraea alba Du Roi | White meadow-sweet | Spirée blanche | Rosaceae | Shrub |
| | Spiraea tomentosa L. | Hardhack, steeple-bush | Spirée tomenteuse, thé du Canada | Rosaceae | Shrub |
| | Sporobolus heterolepis (A. Gray) A. Gray | Prairie dropseed | Sporobole à glumes inégales | Poaceae | Herb |
| | Stachys palustris L. | Woundwort | épiaire des marais | Lamiaceae | Herb |
| | Stellaria media (L.) Vill. | Common chickweed | Stellaire moyenne, mouron des oiseaux | Caryophyllaceae | Herb |
| | | Stereocaulon paschale (L.) Hoffm. | Snow lichen | | Stereocaulaceae | Lichen |
| | Streptopus amplexifolius L. (DC.) | Solomon's seal, eel berry | Streptope amplexicaule | Liliaceae | Herb |
| | Streptopus lanceolatus (Aiton) Reveal var. roseus (Michx.) Reveal Syn.: S. roseus Michx. | Twisted-stalk | Streptope rose, rognons de coq | Liliaceae | Herb |
| | Symphoricarpos albus (L.) S.F. Blake var. albus Syn.: S. racemosus Michx. | Snowberry, wax berry, wolfberry | Symphorine blanche, graine d'hiver, graine de loup | Caprifoliaceae | Shrub |
| | Symphoricarpos occidentalis Hook. | Western snowberry | Symphorine de l'Ouest | Caprifoliaceae | Shrub |
| | Symphoricarpos orbiculatus Moench | Indian currant | Symphorine à feuilles rondes | Caprifoliaceae | Shrub |
| | Symphyotrichum ciliolatum (Lindl.) A. Löve & D. Löve Syn.: Aster ciliolatus Lindl. | Lindley's aster | Aster ciliolé | Asteraceae | Herb |
| | Symphyotrichum laeve (L.) A. Löve & D. Löve Syn.: Aster laevis L. | Smooth aster | Aster lisse | Asteraceae | Herb |
| | Symphyotrichum puniceum (L.) A. Löve & D. Löve Syn.: Aster puniceus L. | Purple-stemmed aster | Aster ponceau | Asteraceae | Herb |
| | Symplocarpus foetidus (L.) Nutt. | Skunk cabbage | Symplocarpe fétide, tabac du diable, chou puant | Araceae | Herb |
| | Tanacetum vulgare L. | Common tansy | Tanaisie vulgaire | Asteraceae | Herb |
| | Taraxacum officinale F.H. Wigg. | Dandelion | Pissenlit | Asteraceae | Herb |
| | Taxus canadensis Marsh. | Canada yew, ground hemlock | If du Canada, buis de sapin | Taxaceae | Shrub |
| | Thalictrum dasycarpum Fisch. & Avé-Lall. | Meadow rue | Pigamon pourpré | Ranunculaceae | Herb |
| | | Thaspium barbinode (Michx.) Nutt. | Bearded meadow parsnip | Panais à noeuds velus | Apiaceae | Herb |
| | Thuja occidentalis L. | Arbor vitae, white cedar | Thuya, cèdre | Cupressaceae | Tree |
| | | Thuja plicata Donn ex D. Don | Western red cedar, gian arborvitae | Thuya géant, cèdre de l'ouest | Cupressaceae | Tree |
| | Tiarella cordifolia L. | False miterwort | Tiarelle cordifoliée | Saxifragaceae | Herb |
| | Tilia americana L. | Basswood, whitewood | Tilleul d'Amérique, bois blanc | Tiliaceae | Tree |
| | | Toxicodendron pubescens Mill. Syn: Rhus toxicodendron L. | Poison ivy | Herbe à puce | Anacardiaceae | Shrub |
| | | Trametes suaveolens (L. Ex Fries) Fries. | Diamond willow fungus | Tramète parfumée | Polyporaceae | Fungi |
| | Trientalis borealis Raf. ssp. borealis | Star anemone | Trientale boréale | Primulaceae | Herb |
| | Trifolium hybridum L. | Alsike clover | Trèfle hybride, trèfle Alsike | Fabaceae | Herb |
| | Trifolium pratense L. | Red clover | Trèfle des prés, trèfle rouge | Fabaceae | Herb |
| | Triglochin maritima L. | Seaside arrow-grass | Troscart maritime, faux jonc | Juncaginaceae | Herb |
| | Trillium erectum L. | Bethroot, red trillium | Trille dressé, trille rouge | Liliaceae | Herb |
| | | Trillium grandiflorum (Michx.) Salisb. | White trillium | Trille blanc, trille grandiflore | Liliaceae | Herb |
| | Trillium undulatum Willd. | Painted trillium | Trille ondulé | Liliaceae | Herb |
| | Triosteum perfoliatum L. | Horse gentian | Trioste orangé | Caprifoliaceae | Herb |
| | Tsuga canadensis (L.) Carrière | Eastern hemlock | Prûche | Pinaceae | Tree |
| | Typha angustifolia L. | Cat-tail flag | Quenouille | Typhaceae | Herb |
| | Typha latifolia L. | Cattail | Massette, quenouille | Typhaceae | Herb |
| | Ulmus americana L. | American elm | Orme d'Amérique | Ulmaceae | Tree |
| | Ulmus rubra Muhl. Syn.: U. fulva Michx. | Slippery elm | Orme rouge | Ulmaceae | Tree |
| | | Umbilicaria mammulata (Ach.) Tuck. Syn.: Gyrophora dillenii (Tuck.) Müll. Arg. | Lichen | Tripe de roche | Umbilicariaceae | Lichen |
| | | Umbilicaria muehlenbergii (Ach.) Tuck. Syn.: Actinogyra muehlenbergii (Ach.) Schol. | Rock tripe | | Umbilicariaceae | Lichen |
| | Urtica dioica L. | Stinging nettle | Ortie | Urticaceae | Herb |
| | Urtica dioica L. ssp. gracilis (Aiton) Seland. Syn.: U. lyallii S. Watson; U. procera Muhl. ex Willd | Nettle | Ortie élevée | Urticaceae | Herb |
| | | Usnea hirta (L.) F. H. Wigg. | Beard lichen | Usnée hirta | Parmeliaceae | Lichen |
| | | Usnea sp. | Old man's beard moss | Usnée | Parmeliaceae | Lichen |
| | Utricularia vulgaris L. | Bladderwort | Utriculaire commune | Lentibulariaceae | Herb |
| | | Uvularia grandiflora Sm. | Large flowered bellwort | Uvulaire grandiflore | Liliaceae | Herb |
| | Vaccinium angustifolium Aiton Syn.: V.pennsylvanicum Lam. | Late sweet blueberry, low-bush blueberry | Airelle à feuilles étroites, bleuet | Ericaceae | Shrub |
| | Vaccinium macrocarpon Aiton Syn.: Oxycoccus macrocarpus (Aiton) Pursh | Cranberry | Airelle à gros fruits, gros atocas | Ericaceae | Shrub |
| | | Vaccinium myrtilloides Michx. | Blueberry, bilberry, whortle berry, huckleberry | Airelle fausse-myrtille, bleuet | Ericaceae | Shrub |
| | | Vaccinium oxycoccus L. | Cranberry | Canneberge, atocas | Ericaceae | Shrub |
| | Vaccinium uliginosum L. | Alpine bilberry, bog blueberry | Airelle des marécages | Ericaceae | Shrub |
| | Vaccinium vitis-idaea L. | Bog cranberry, cowberry, lingonberry | Airelle vigne d'Ida, berris, graines rouges | Ericaceae | Shrub |
| | Valeriana dioica L. | Northern valerian | Valériane | Valerianaceae | Herb |
| | | Valeriana dioica L. var. sylvatica S. Watson Syn.: V. sylvatica Sol. ex Richardson, non F.W. Schmidt V. septentrionalis Rydb. | Northern valerian, wood valerian | Valériane nordique | Valerianaceae | Herb |
| | Veratrum viride Aiton Syn.: V. eschscholtzii A. Gray | False or indian hellebore | Vérâtre vert, tabac du diable, hellébore | Liliaceae | Herb |
| | Verbascum thapsus L. | Mullein | Molène vulgaire, tabac du diable | Scrophulariaceae | Herb |
| | Verbena hastata L. | Blue vervain | Verveine hastée | Verbenaceae | Herb |
| | Veronicastrum virginicum (L.) Farw. Syn.: Leptandra virginica (L.) Nutt. V. virginica L. | Culver's root | Véronique de Virginie | Scrophulariaceae | Herb |
| | Viburnum acerifolium L. | Mapleleaf viburnum | Viorne à feuilles d'érable | Caprifoliaceae | Shrub |
| | | Viburnum edule (Michx.) Raf. Syn.: V. pauciflorum La Pylaie ex Torr. & A. Gray | Pembina, squashberry, mooseberry, low bush-cranberry | Viorne comestible, pimbina | Caprifoliaceae | Shrub |
| | | Viburnum lantanoides Michx. Syn.: V. alnifolium Marsh. | Hobblebush | Viorne à feuilles d'aulne, bois d'orignal | Caprifoliaceae | Shrub |
| | Viburnum lentago L. | Sheepberry, nannyberry | Viorne lentago, alisier, bourdaine | Caprifoliaceae | Shrub |
| | Viburnum opulus L. | Cranberries, flat seed berries, moose berry | Viorne obier | Caprifoliaceae | Shrub |
| | Viburnum opulus L. var. americanum Aiton | Bush cran berry | Viorne trilobée | Caprifoliaceae | Shrub |
| | | Viburnum prunifolium L. Syn.: V. pomifolium | Stag-bush sloe | Viorne à feuilles de cerisier | Caprifoliaceae | Shrub |
| | Viola bicolor Pursh | Field pansy | Violette de Rafinesque | Violaceae | Herb |
| | Viola canadensis L. | Canada violet | Violette du Canada | Violaceae | Herb |
| | Viola labradorica Schrank Syn.: V. conspersa Rchb. | American dog violet, alpine violet | Violette du Labrador | Violaceae | Herb |
| | Viola pubescens Aiton | Downy yellow violet | Violette pubescente | Violaceae | Herb |
| | | Vitis sp. | Wild grape | Vigne sauvage | Vitaceae | Vine |
| | Vitis vulpina L. Syn.: V. cordifolia Michx. | Frost grape, river-bank grape | Vigne des renards | Vitaceae | Vine |
| | | Zanthoxylum americanum Mill. | Prickly ash | Clavalier d'Amérique, frêne épineux | Rutaceae | Shrub |
| | Zizania aquatica L. | Wildrice | Zizanie aquatique, folle avoine, riz sauvage | Poaceae | Herb |
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