Minnesota Plant List
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Number of results: 1848
| Scientific Name | Common Name(s) |
|---|---|
| Abies balsamea | Balsam Fir |
| Abutilon theophrasti | Velvet Leaf, Indian Mallow, Pie-marker |
| Acalypha rhomboidea | Three-seeded Mercury, Rhombic Copperleaf |
| Acer ginnala | Amur Maple, Ginnala Maple |
| Acer negundo | Boxelder, Ash-leaf Maple, Manitoba Maple |
| Acer nigrum | Black Maple |
| Acer platanoides | Norway Maple |
| Acer rubrum | Red Maple |
| Acer saccharinum | Silver Maple |
| Acer saccharum | Sugar Maple |
| Acer spicatum | Mountain Maple |
| Acer X freemanii | Freeman Maple |
| Achillea alpina | Siberian Yarrow, Chinese Yarrow, Alpine Yarrow |
| Achillea millefolium | Common Yarrow |
| Achillea ptarmica | Sneezewort, Sneezeweed, Pearly Yarrow |
| Achnatherum hymenoides | Indian Rice Grass, Indian Mountain Ricegrass |
| Acmispon americanus | American Bird's-foot Trefoil, Prairie Trefoil, Spanish Clover, American Deerweed |
| Acorus americanus | Sweet-flag |
| Actaea pachypoda | White Baneberry, Doll's-eyes |
| Actaea rubra | Red Baneberry |
| Adiantum pedatum | Maidenhair Fern, Northern Maidenhair |
| Adlumia fungosa | Allegheny Vine, Climbing Fumitory, Mountain Fringe |
| Adoxa moschatellina | Moschatel, Musk-root |
| Aegopodium podagraria | Goutweed, Bishop's Goutweed, Snow-on-the-mountain |
| Aesculus glabra | Ohio Buckeye |
| Aesculus hippocastanum | Horse Chestnut |
| Aethusa cynapium | Fool's Parsley |
| Agalinis aspera | Rough False Foxglove, Rough Purple False Foxglove, Rough Gerardia |
| Agalinis auriculata | Earleaf False Foxglove, Eared False Foxglove |
| Agalinis gattingeri | Round-stemmed False Foxglove, Gattinger's Gerardia |
| Agalinis paupercula | Small-flower False Foxglove, Small-flowered Gerardia, Small-flowered Agalinis, Smooth False Foxglove |
| Agalinis purpurea | Purple False Foxglove, Purple Gerardia, Purple Agalinis |
| Agalinis tenuifolia | Slender-leaved False Foxglove, Slender Gerardia, Slender Agalinis, Common False Foxglove |
| Agastache foeniculum | Blue Giant Hyssop, Lavender Hyssop, Anise Hyssop |
| Agastache nepetoides | Yellow Giant Hyssop, Catnip Giant Hyssop |
| Agastache scrophulariifolia | Purple Giant Hyssop |
| Ageratina altissima | White Snakeroot |
| Agoseris glauca | False Dandelion, Pale Agoseris, Pale Goat Chicory, Prairie Dandelion |
| Agrimonia gryposepala | Tall Hairy Agrimony, Tall Agrimony, Common Agrimony, Tall Hairy Groovebur |
| Agrimonia pubescens | Downy Agrimony, Soft Agrimony, Soft Groovebur |
| Agrimonia striata | Roadside Agrimony, Woodland Agrimony, Woodland Grooveburr |
| Agropyron cristatum | Crested Wheatgrass |
| Agrostis gigantea | Redtop, Black Bent Grass |
| Agrostis perennans | Autumn Bentgrass, Upland Bentgrass |
| Agrostis scabra | Rough Bentgrass, Ticklegrass |
| Agrostis stolonifera | Creeping Bentgrass, Spreading Bentgrass, Redtop |
| Alisma gramineum | Narrow-leaved Water Plantain |
| Alisma triviale | Northern Water Plantain, Large-flowered Water Plantain |
| Alliaria petiolata | Garlic Mustard |
| Allium burdickii | Narrow-leaf Wild Leek, Burdick's Leek, Narrow-leaf Ramps |
| Allium canadense | Wild Garlic, Meadow Garlic |
| Allium cernuum | Nodding Wild Onion |
| Allium schoenoprasum | Wild Chives |
| Allium stellatum | Prairie Onion, Autumn Onion, Pink Wild Onion, Prairie Wild Onion |
| Allium textile | White Wild Onion, Textile Onion |
| Allium tricoccum | Wild Leek, Ramps, Three-seeded Leek |
| Allium tuberosum | Chinese Chives, Garlic Chives |
| Alnus incana | Speckled Alder, Grey Alder |
| Alnus viridis | Green Alder, Mountain Alder |
| Alopecurus aequalis | Shortawn Foxtail, Orange Foxtail, Short-awn Meadow-Foxtail |
| Alopecurus arundinaceus | Creeping Foxtail, Creeping Meadow-Foxtail |
| Alopecurus carolinianus | Carolina Foxtail, Tufted Meadow-Foxtail |
| Alopecurus pratensis | Meadow Foxtail, Field Meadow-Foxtail |
| Alyssum alyssoides | Pale Madwort, Yellow Alyssum, Small Alison, Small Alyssum |
| Alyssum desertorum | Desert Madwort, Desert Alyssum |
| Amaranthus albus | Tumbleweed Amaranth, Tumble Pigweed, White Amaranth |
| Amaranthus blitoides | Prostrate Pigweed, Mat Amaranth, Spreading Amaranth |
| Amaranthus retroflexus | Redroot Pigweed, Redroot Amaranth, Rough Pigweed, Green Pigweed |
| Amaranthus tuberculatus | Rough-fruited Waterhemp, Rough-fruited Amaranth, Tall Water-hemp, Common Waterhemp, Tubercled Amaranth |
| Ambrosia artemisiifolia | Common Ragweed, Annual Ragweed |
| Ambrosia psilostachya | Western Ragweed, Cuman Ragweed |
| Ambrosia trifida | Giant Ragweed, Great Ragweed, Horseweed |
| Amelanchier arborea | Downy Serviceberry, Downy Shadbush, Common Serviceberry |
| Amelanchier bartramiana | Mountain Serviceberry, Mountain Juneberry, Bartram's Shadbush, Oblongfruit Serviceberry, Northern Juneberry |
| Amelanchier interior | Inland Serviceberry, Inland Shadbush, Inland Juneberry, Pacific Serviceberry |
| Amelanchier laevis | Smooth Serviceberry, Smooth Shadbush, Allegheny Serviceberry, Smooth Juneberry |
| Amerorchis rotundifolia | Small Round-leaved Orchid, Round-leaved Orchis |
| Ammannia robusta | Grand Redstem, Grand Ammannia, Scarlet Loosestrife, Sessile Toothcup |
| Ammophila breviligulata | American Beach Grass |
| Amorpha canescens | Lead Plant, Shoestrings |
| Amorpha fruticosa | False Indigo, Desert False Indigo, Bastard Indigo |
| Amorpha nana | Fragrant False Indigo, Dwarf False Indigo, Dwarf Lead Plant, Smooth Lead Plant, Fragrant Indigo-bush |
| Amphicarpaea bracteata | American Hog Peanut |
| Anaphalis margaritacea | Pearly Everlasting, Large-flowered Everlasting |
| Andromeda polifolia | Bog Rosemary |
| Andropogon gerardii | Big Bluestem, Turkey-foot |
| Androsace occidentalis | Western Rock Jasmine, Western androsace |
| Androsace septentrionalis | Northern Androsace, Northern Fairy Candelabra, Pygmy-flower Rock Jasmine |
| Anemone acutiloba | Sharp-lobed Hepatica, Liverwort, Liverleaf |
| Anemone americana | Round-lobed Hepatica, Liverleaf, Liverwort |
| Anemone canadensis | Canada Anemone |
| Anemone caroliniana | Carolina anemone, Carolina Thimbleweed |
| Anemone cylindrica | Thimbleweed, Long-fruited Thimbleweed, Long-headed Anemone, Candle Anemone, Cottenweed |
| Anemone patens | American Pasqueflower, Eastern Pasque Flower, Prairie Crocus, Cutleaf Anemone |
| Anemone quinquefolia | Wood Anemone, Nightcaps |
| Anemone virginiana | Tall Thimbleweed, Virginia Anemone |
| Angelica atropurpurea | Angelica, Great Angelica, Purple-stemmed Angelica |
| Antennaria howellii | Howell's Pussytoes, Small Pussytoes |
| Antennaria microphylla | Tiny-leaved Pussytoes, Little-leaf Pussytoes, Rosy Pussytoes |
| Antennaria neglecta | Field Pussytoes |
| Antennaria parlinii | Parlin's Pussytoes, Smooth Pussytoes |
| Antennaria parvifolia | Small-leaved Pussytoes, Nuttall's Pussytoes |
| Antennaria plantaginifolia | Plantain-leaved Pussytoes, Woman's Tobacco, Plain-leaf Pussytoes |
| Anthemis cotula | Dog Fennel, Stinking Chamomile, Mayweed |
| Anthoxanthum hirtum | Sweetgrass, Northern Sweet Grass, Vanilla Grass |
| Anthoxanthum odoratum | Sweet Vernal Grass |
| Anthriscus sylvestris | Wild Chervil, Cow Parsley |
| Apios americana | Groundnut, American Potato-bean, Indian Potato |
| Aplectrum hyemale | Putty-root, Adam and Eve |
| Apocynum androsaemifolium | Spreading Dogbane |
| Apocynum cannabinum | Indian Hemp, Prairie Dogbane, Hemp Dogbane |
| Aquilegia canadensis | Red Columbine, Wild Columbine |
| Arabidopsis lyrata | Lyre-leaved Rock Cress, Lyrate Rockcress, Sand Cress, Harp-leaf Rockcress |
| Arabidopsis thaliana | Mouse-ear Cress, Thale Cress |
| Arabis pycnocarpa | Hairy Rock Cress, Cream-flower Rock-cress |
| Aralia hispida | Bristly Sarsaparilla |
| Aralia nudicaulis | Wild Sarsaparilla |
| Aralia racemosa | Spikenard, American Spikenard |
| Arceuthobium pusillum | Eastern Dwarf Mistletoe |
| Arctium lappa | Great Burdock |
| Arctium minus | Common Burdock, Lesser Burdock |
| Arctium tomentosum | Woolly Burdock |
| Arctostaphylos uva-ursi | Bearberry, Kinnikinnick |
| Arenaria serpyllifolia | Thyme-leaved Sandwort |
| Arethusa bulbosa | Dragon's Mouth, Swamp Pink |
| Arisaema dracontium | Green Dragon |
| Arisaema triphyllum | Jack-in-the-Pulpit, Indian Turnip |
| Aristida basiramea | Forked Three-awn, Fork-tipped Three-awn, Base-branched Three-awn |
| Aristida dichotoma | Churchmouse Three-awn, Poverty Grass, Poverty Three-awn, Shinner's Three-awn |
| Aristida longespica | Slimspike Three-awn, Red Three-awn |
| Aristida purpurea | Purple Three-awn, Red Three-awn |
| Aristida tuberculosa | Seaside Three-awn |
| Armoracia rusticana | Horseradish |
| Arnica lonchophylla | Long-leaf Arnica, Northern Arnica |
| Arnoglossum plantagineum | Tuberous Indian Plantain, Prairie Indian Plantain, Groovestem Indian Plantain |
| Arnoglossum reniforme | Great Indian Plantain |
| Aronia melanocarpa | Black Chokeberry |
| Artemisia absinthium | Absinthium, Absinthe Wormwood |
| Artemisia biennis | Biennial Wormwood |
| Artemisia campestris | Field Sagewort, Tall Wormwood |
| Artemisia dracunculus | Tarragon |
| Artemisia frigida | Prairie Sagewort, Sage Wormwood, Fringed Sagewort |
| Artemisia ludoviciana | White Sage, White Sagebrush, Prairie Sage, Western Mugwort |
| Artemisia serrata | Saw-tooth Wormwood, Leafy Mugwort, Toothed Sagewort, Saw-leaf Mugwort |
| Artemisia vulgaris | Common Mugwort, Common Wormwood |
| Asarum canadense | Canadian Wild Ginger |
| Asclepias amplexicaulis | Clasping Milkweed, Blunt-leaved Milkweed, Sand Milkweed |
| Asclepias exaltata | Poke Milkweed, Tall Milkweed |
| Asclepias hirtella | Prairie Milkweed, Tall Green Milkweed |
| Asclepias incarnata | Swamp Milkweed, Swamp Silkweed |
| Asclepias lanuginosa | Woolly Milkweed, Side-cluster Milkweed |
| Asclepias ovalifolia | Oval-leaf Milkweed, Dwarf Milkweed |
| Asclepias purpurascens | Purple Milkweed |
| Asclepias speciosa | Showy Milkweed |
| Asclepias stenophylla | Narrow-leaved Milkweed, Slimleaf Milkweed |
| Asclepias sullivantii | Sullivant's Milkweed, Smooth Milkweed, Prairie Milkweed |
| Asclepias syriaca | Common Milkweed, Silkweed, Milkplant |
| Asclepias tuberosa | Butterfly-weed, Butterfly Milkweed |
| Asclepias verticillata | Whorled Milkweed |
| Asclepias viridiflora | Green Milkweed, Green Comet Milkweed |
| Asparagus officinalis | Garden Asparagus, Common Asparagus |
| Asplenium platyneuron | Ebony Spleenwort |
| Asplenium rhizophyllum | Walking Fern |
| Asplenium trichomanes | Maidenhair Spleenwort |
| Astragalus adsurgens | Prairie Milkvetch, Standing Milk-vetch, Lavender Milk-vetch |
| Astragalus agrestis | Field Milkvetch, Purple Milk-vetch |
| Astragalus alpinus | Alpine Milkvetch |
| Astragalus canadensis | Canada Milkvetch, Canadian Milk-vetch |
| Astragalus cicer | Chickpea Milk-vetch, Cicer Milkvetch |
| Astragalus crassicarpus | Ground Plum, Prairie Plum, Groundplum Milkvetch, Buffalo Bean |
| Astragalus flexuosus | Slender Milkvetch, Flexile Milkvetch |
| Astragalus lotiflorus | Lotus Milkvetch, Low Milk-vetch |
| Astragalus missouriensis | Missouri Milkvetch |
| Astragalus neglectus | Cooper's Milkvetch |
| Astragalus racemosus | Cream Milkvetch, Racemose Milkvetch, Alkali Milkvetch, Creamy Poison-vetch, Alkali Poison-vetch |
| Athyrium Filix-femina | Lady Fern |
| Aureolaria pedicularia | Fern-leaf False Foxglove |
| Avena sativa | Cultivated Oats, Common Oats |
| Avenula hookeri | Spike-oat, Hooker's Oat Grass |
| Avenula pubescens | Downy Oat Grass, Downy Alpine Oat-grass |
| Azolla microphylla | Mexican Mosquito Fern, Mexican Water-fern, Floating Fern |
| Bacopa rotundifolia | Water-hyssop, Disk Water-hyssop, Round-leaf Water-hyssop |
| Baptisia lactea | White Wild Indigo, White False Indigo, Prairie False Indigo, Large-leaf Wild Indigo |
| Baptisia leucophaea | Plains Wild Indigo, Cream Wild Indigo, Cream False Indigo, Long-bract Wild Indigo |
| Barbarea orthoceras | American Yellow Rocket, American Winter Cress, Northern Winter-cress |
| Barbarea vulgaris | Garden Yellow Rocket, Winter Cress, Yellow-rocket |
| Bartonia virginica | Yellow Bartonia, Virginia Bartonia, Yellow Screw-stem |
| Bassia scoparia | Summer Cypress, Mexican Fireweed, Common Kochia, Burning Bush |
| Beckmannia syzigachne | American Slough Grass |
| Berberis thunbergii | Japanese Barberry |
| Berteroa incana | Hoary Alyssum, Hoary False Madwort |
| Berula erecta | Cut-leaf Water Parsnip, Stream Parsnip |
| Besseya bullii | Kittentails, Bull's Coraldrops |
| Betula alleghaniensis | Yellow Birch |
| Betula cordifolia | Heart-leaved Birch, Mountain White Birch |
| Betula nigra | River Birch |
| Betula papyrifera | Paper Birch, White Birch |
| Betula pumila | Bog Birch, Dwarf Birch |
| Bidens beckii | Water Marigold, Beck's Water Marigold, Beck's Marsh Marigold |
| Bidens cernua | Nodding Bur-Marigold, Nodding Beggarticks |
| Bidens connata | Purple-stem Beggarticks, Swamp Beggarticks |
| Bidens discoidea | Discoid Beggarticks, Swamp Beggarticks |
| Bidens frondosa | Devil's Beggarticks, Leafy Beggarticks, Devil's Pitchfork |
| Bidens trichosperma | Crowned Beggarticks, Northern Tickseed-sunflower, Tall Tickseed-sunflower, Tall Swamp Marigold |
| Bidens tripartita | Three-lobed Beggarticks, Straw-stem Beggarticks, Leafy-bracted Beggarticks |
| Bidens vulgata | Big Devil's Beggarticks, Tall Beggarticks, Common Beggarticks |
| Bistorta vivipara | Alpine Bistort |
| Blephilia hirsuta | Hairy Woodmint, Hairy Pagoda Plant |
| Boechera canadensis | Sickle-pod, Canadian Rockcress |
| Boechera collinsii | Collins' Rock Cress |
| Boechera dentata | Toothed Rock Cress, Short's Rock Cress, Stellate Rock Cress |
| Boechera grahamii | Spreading-pod Rock Cress, Purple Rockcress |
| Boechera laevigata | Smooth Rock Cress |
| Boechera stricta | Drummond's Rock Cress, Canada Rockcress |
| Boehmeria cylindrica | Small-spike False Nettle |
| Bolboschoenus fluviatilis | River Bulrush, River Bulsedge |
| Bolboschoenus maritimus | Prairie Bulrush, Cosmopolitan Bulrush, Sea Clubrush, Saltmarsh Bulrush |
| Boltonia asteroides | False Aster, White Doll's Eyes, White Doll's Daisy |
| Botrychium angustisegmentum | Narrow Triangle Moonwort, Lance-leaved Moonwort |
| Botrychium matricariifolium | Matricary Grapefern, Daisy-leaved Moonwort |
| Botrychium michiganense | Michigan Moonwort |
| Botrypus virginianus | Rattlesnake Fern |
| Bouteloua curtipendula | Side-oats Grama |
| Bouteloua gracilis | Blue Grama |
| Bouteloua hirsuta | Hairy Grama |
| Brachyelytrum aristosum | Northern Shorthusk |
| Brachyelytrum erectum | Bearded Shorthusk, Long-awned Wood Grass, Southern Shorthusk |
| Brasenia schreberi | Water-shield |
| Brassica nigra | Black Mustard |
| Brassica rapa | Field Mustard, Turnip Rape, Wild Mustard, Bird's-rape |
| Brickellia eupatorioides | False Boneset |
| Bromus ciliatus | Fringed Brome |
| Bromus inermis | Smooth Brome |
| Bromus japonicus | Japanese Brome |
| Bromus kalmii | Kalm's Brome, Prairie Brome, Arctic Brome |
| Bromus latiglumis | Earlyleaf Brome, Ear-leaved Brome, Broad-glumed Brome, Flanged Brome |
| Bromus pubescens | Hairy Woodland Brome, Canada Brome, Hairy Wood Chess, Hairy Brome |
| Bromus tectorum | Cheatgrass, Downy Brome, Downy Chess |
| Buchloe dactyloides | Buffalo Grass |
| Bulbostylis capillaris | Dense-tuft Hairsedge, Tufted Hairsedge |
| Butomus umbellatus | Flowering Rush |
| Calamagrostis canadensis | Canada Bluejoint, Bluejoint Reedgrass |
| Calamagrostis montanensis | Plains Reedgrass |
| Calamagrostis purpurascens | Purple Reedgrass |
| Calamagrostis stricta | Slimstem Reedgrass, Northern Reedgrass, Neglected Reedgrass |
| Calamovilfa longifolia | Sand Reed Grass, Prairie Sandreed |
| Calla palustris | Wild Calla, Water Arum |
| Callirhoe triangulata | Clustered Poppy-mallow |
| Callitriche palustris | Vernal Water-starwort, Spring Water-starwort, Narrow-fruited Water-starwort, Common Water-starwort |
| Calopogon oklahomensis | Oklahoma Grass-pink |
| Calopogon tuberosus | Tuberous Grass-pink |
| Caltha natans | Floating Marsh Marigold |
| Caltha palustris | Marsh Marigold, Cowslips |
| Calypso bulbosa var. americana | Fairy Slipper, Calypso Orchid |
| Calystegia sepium | Hedge Bindweed, Hedge False Bindweed |
| Calystegia spithamaea | Low False Bindweed, Upright Bindweed, Erect Bindweed |
| Camelina microcarpa | Small-seeded False Flax, Littlepod False Flax |
| Camelina sativa | Large-seeded False Flax, Gold-of-Pleasure |
| Campanula aparinoides | Marsh Bellflower, Bedstraw Bellflower |
| Campanula cervicaria | Bristly Bellflower, Bristly Bluebells |
| Campanula rapunculoides | Creeping Bellflower, Rampion Bellflower, European Bellflower |
| Campanula rotundifolia | Harebell, Bluebell Bellflower, Bluebells of Scotland |
| Campanulastrum americanum | American Bellflower, Tall Bellflower |
| Canadanthus modestus | Modest Aster, Great Northern Aster, Giant Mountain Aster, Northwestern Sticky Aster |
| Cannabis sativa | Hemp, Ditchweed, Marijuana |
| Capsella bursa-pastoris | Shepherd's Purse |
| Caragana arborescens | Siberian Peashrub, Siberian Pea Tree |
| Cardamine bulbosa | Spring Cress, Bulbous Bittercress |
| Cardamine concatenata | Cutleaf Toothwort |
| Cardamine impatiens | Narrow-leaf Bittercress, Bushy Rockcress |
| Cardamine parviflora | Small-flowered Bittercress, Sand Bittercress, Dry-land Bittercress |
| Cardamine pensylvanica | Pennsylvania Bittercress |
| Cardamine pratensis | Cuckoo Flower |
| Carduus acanthoides | Plumeless Thistle, Spiny Plumeless Thistle |
| Carduus nutans | Nodding Thistle, Nodding Plumeless Thistle, Musk Thistle |
| Carex albursina | White Bear Sedge, Blunt-scaled Wood Sedge |
| Carex alopecoidea | Foxtail Sedge |
| Carex annectens | Yellow-fruit Sedge, Yellow Fox Sedge |
| Carex aquatilis | Water Sedge, Aquatic Sedge |
| Carex arcta | Northern Clustered Sedge |
| Carex arctata | Drooping Wood Sedge |
| Carex assiniboinensis | Assiniboine Sedge, Assiniboia Sedge |
| Carex atherodes | Slough Sedge, Wheat Sedge, Awned Sedge, Hairy-leaved Lake Sedge |
| Carex aurea | Golden-fruited Sedge |
| Carex backii | Back's Sedge |
| Carex bebbii | Bebb's Sedge |
| Carex bicknellii | Bicknell's Sedge, Copper-shouldered Oval Sedge |
| Carex blanda | Common Woodland Sedge, Charming Sedge |
| Carex brevior | Short-beak Sedge, Short Sedge |
| Carex bromoides | Brome-like Sedge |
| Carex brunnescens | Brownish Sedge, Green Bog Sedge |
| Carex buxbaumii | Buxbaum's Sedge, Brown Bog Sedge |
| Carex canescens | Silvery Sedge, White Sedge |
| Carex capillaris | Hair-like Sedge |
| Carex careyana | Carey's Sedge |
| Carex castanea | Chestnut Sedge |
| Carex cephaloidea | Thin-leaf Sedge, Cluster-bracted Sedge |
| Carex cephalophora | Oval-headed Sedge, Oval-leaf Sedge, Short-headed Bracted Sedge |
| Carex chordorrhiza | Creeping Sedge, String-root Sedge |
| Carex communis | Fibrous-root Sedge, Colonial Sedge |
| Carex comosa | Bristly Sedge, Long-hair Sedge, Bottlebrush Sedge |
| Carex conjuncta | Soft Fox Sedge, Jointed Sedge |
| Carex conoidea | Openfield Sedge, Field Sedge, Prairie Gray Sedge |
| Carex crawei | Crawe's Sedge |
| Carex crawfordii | Crawford's Sedge, Early Fen Sedge |
| Carex crinita | Fringed Sedge |
| Carex cristatella | Crested Sedge, Crested Oval Sedge |
| Carex crus-corvi | Raven's-foot Sedge |
| Carex cryptolepis | Northeastern Sedge, Small Yellow Sedge, Crypitc Sedge, Secretive Sedge |
| Carex davisii | Davis' Sedge |
| Carex debilis | Weak Sedge, White-edge Sedge |
| Carex deflexa | Northern Sedge |
| Carex deweyana | Dewey's Sedge, Round-fruited Short-scaled Sedge |
| Carex diandra | Lesser Panicled Sedge, Lesser Tussock Sedge |
| Carex disperma | Soft-leaf Sedge, Two-seeded Sedge |
| Carex duriuscula | Needleleaf Sedge, Spike-rush Sedge |
| Carex eburnea | Ivory Sedge, Bristleleaf Sedge |
| Carex echinata | Star Sedge, Little Prickly Sedge, Slender Sedge |
| Carex echinodes | Marsh Straw Sedge, Pointed Quill Sedge |
| Carex emoryi | Emory's Sedge, Riverbank Sedge |
| Carex exilis | Coastal Sedge |
| Carex filifolia | Thread-leaf Sedge |
| Carex flava | Yellow Sedge, Yellow-green Sedge |
| Carex foenea | Straw Sedge, Hay Sedge, Bronze-Head Oval Sedge, Dry-spike Sedge, Bronze Sedge |
| Carex formosa | Handsome Sedge |
| Carex garberi | Elk Sedge, Garber's Sedge |
| Carex gracillima | Graceful Sedge |
| Carex granularis | Limestone Meadow Sedge, Meadow Sedge, Granular Sedge, Pale Sedge |
| Carex gravida | Heavy Sedge, Heavy-fruited Sedge, Long-awned Bracted Sedge |
| Carex grayi | Gray's Sedge, Common Bur Sedge, Morning Star Sedge |
| Carex grisea | Wood Gray Sedge, Inflated Narrow-leaf Sedge, Ambiguous Sedge |
| Carex gynandra | Nodding Sedge |
| Carex gynocrates | Northern Bog Sedge, Feminine Sedge |
| Carex hallii | Hall's Sedge, Deer Sedge |
| Carex haydenii | Hayden's Sedge, Cloud Sedge |
| Carex hirtifolia | Hairy Wood Sedge, Pubescent Sedge, Hairy-leaved Sedge, Hairy Sedge |
| Carex hitchcockiana | Hitchcock's Sedge |
| Carex hookerana | Hooker's Sedge |
| Carex houghtoniana | Houghton's Sedge |
| Carex hystericina | Porcupine Sedge, Bottlebrush Sedge |
| Carex inops | Sun-loving Sedge, Long-stolon Sedge, Sun Sedge |
| Carex interior | Inland Sedge |
| Carex intumescens | Greater Bladder Sedge, Bladder Sedge, Shining Bur Sedge |
| Carex jamesii | James' Sedge |
| Carex lacustris | Lake Sedge, Hairy Sedge, Lake-bank Sedge, Ripgut Sedge |
| Carex laeviconica | Smooth-cone Sedge, Plains Slough Sedge, Long-tooth Lake Sedge |
| Carex laevivaginata | Smooth-sheathed Sedge |
| Carex lasiocarpa | Wiregrass Sedge, Fen Wiregrass Sedge, Woolly-fruited Sedge |
| Carex laxiculmis | Spreading Sedge, Creeping Sedge, Loose-culmed Sedge |
| Carex lenticularis | Lakeshore Sedge, Shore Sedge, Lenticular Sedge |
| Carex leptalea | Bristle-stalked Sedge |
| Carex leptonervia | Nerveless Woodland Sedge, Fine-nerved Sedge |
| Carex limosa | Mud Sedge, Bog Sedge, Shore Sedge, Candle-lantern sedge |
| Carex livida | Livid Sedge, Pale Sedge, Lead-colored Sedge |
| Carex lupulina | Common Hop Sedge |
| Carex magellanica | Poor Sedge, Bog Sedge, Boreal Bog Sedge |
| Carex meadii | Mead's Sedge |
| Carex media | Intermediate Sedge, Close-headed Sedge, Norway Sedge, Scandanavian Sedge |
| Carex merritt-fernaldii | Fernald's Sedge |
| Carex michauxiana | Michaux's Sedge |
| Carex molesta | Troublesome Sedge |
| Carex muehlenbergii | Muhlenberg's Sedge, Sand Sedge |
| Carex muskingumensis | Muskingum Sedge, Palm Sedge |
| Carex novae-angliae | New England Sedge |
| Carex obtusata | Blunt Sedge, Obtuse Sedge |
| Carex oligocarpa | Few-fruited Sedge, Eastern Few-fruit Sedge, Rich Woods Sedge, Sparse-fruit Sedge |
| Carex oligosperma | Few-seeded Sedge, Bog Wiregrass Sedge |
| Carex ormostachya | Necklace Spike Sedge, Necklace Sedge |
| Carex pallescens | Pale Sedge |
| Carex pauciflora | Few-flowered Sedge |
| Carex peckii | Peck's Sedge |
| Carex pedunculata | Long-stalked Sedge |
| Carex pellita | Woolly Sedge |
| Carex pensylvanica | Pennsylvania Sedge |
| Carex plantaginea | Plantain-leaved Sedge, Seersucker Sedge |
| Carex praegracilis | Clustered Field Sedge, Freeway Sedge, Very Slender Sedge |
| Carex prairea | Prairie Sedge |
| Carex praticola | Northern Meadow Sedge, Prairie-dweller Sedge |
| Carex projecta | Necklace Sedge |
| Carex pseudocyperus | Cyperus-like Sedge, False Bristly Sedge |
| Carex radiata | Eastern Star Sedge, Straight-styled Wood Sedge |
| Carex retrorsa | Retrorse Sedge, Knotsheath Sedge, Deflexed Bottlebrush Sedge |
| Carex richardsonii | Richardson's Sedge |
| Carex rosea | Rosy Sedge, Starry Sedge, Curly-style Star Sedge |
| Carex rossii | Ross' Sedge |
| Carex rostrata | Beaked Sedge, Glaucus Beaked Sedge, Bottle Sedge |
| Carex sartwellii | Sartwell's Sedge, Running Marsh Sedge |
| Carex saximontana | Rocky Mountain Sedge |
| Carex scirpoidea | Northern Single-spike Sedge, Canadian Single-spike Sedge, Bulrush Sedge |
| Carex scoparia | Pointed Broom Sedge, Broom Sedge, Lance-fruited Oval Sedge |
| Carex siccata | Dry-spike Sedge, Running Prairie Sedge |
| Carex sparganioides | Bur-reed Sedge, Thin-leaved Sedge |
| Carex sprengelii | Sprengel's Sedge, Long-beaked Sedge |
| Carex sterilis | Sterile Sedge, Dioecious Sedge |
| Carex stipata | Awl-fruited Sedge, Common Fox Sedge, Prickly Sedge, Spongy Sedge, Stalk-grained Sedge |
| Carex stricta | Tussock Sedge, Upright Sedge |
| Carex sychnocephala | Many-headed Sedge |
| Carex tenera | Quill Sedge, Delicate Quill Sedge, Marsh Straw Sedge |
| Carex tenuiflora | Sparse-flowered Sedge, Thin-flowered Sedge |
| Carex tetanica | Rigid Sedge |
| Carex tonsa | Shaved Sedge |
| Carex torreyi | Torrey's Sedge |
| Carex tribuloides | Blunt Broom Sedge, Awl-fruited Oval Sedge |
| Carex trichocarpa | Hairy-fruited Sedge |
| Carex trisperma | Three-seeded Sedge |
| Carex tuckermanii | Tuckerman's Sedge |
| Carex typhina | Cattail Sedge |
| Carex umbellata | Parasol Sedge |
| Carex utriculata | Common Beaked Sedge, Northwest Territory Sedge, Swollen Beaked Sedge, Common Yellow Lake Sedge |
| Carex vaginata | Sheathed Sedge |
| Carex vesicaria | Blister Sedge, Inflated Sedge, Lesser Bladder Sedge, Tufted Lake Sedge |
| Carex viridula | Little Green Sedge |
| Carex vulpinoidea | Fox Sedge, Brown Fox Sedge, Common Fox Sedge |
| Carex woodii | Pretty Sedge, Wood's Sedge |
| Carex xerantica | Whitescale Sedge, Dry Sedge, Dry-land Sedge |
| Carpinus caroliniana | Blue Beech, Musclewood, American Hornbeam, Ironwood |
| Carum carvi | Caraway |
| Carya cordiformis | Bitternut Hickory, Yellow-bud Hickory |
| Carya ovata | Shagbark Hickory |
| Castilleja coccinea | Indian Paintbrush, Scarlet Painted-cup |
| Castilleja septentrionalis | Northern Paintbrush, Northern Painted-cup, Labrador Indian Paintbrush, Sulpher Indian Paintbrush, Pale Indian Paintbrush, Pale Painted-cup |
| Castilleja sessiliflora | Downy Painted-cup, Downy Paintbrush, Yellow Painted-cup |
| Catalpa speciosa | Northern Catalpa, Cigar Tree |
| Caulophyllum thalictroides | Blue Cohosh, Pappoose-root, Squaw-root |
| Ceanothus americanus | New Jersey Tea, Redroot, Wild Snowball |
| Ceanothus herbaceus | Narrow-leaved New Jersey Tea, Prairie Redroot |
| Celastrus orbiculatus | Round-leaf Bittersweet, Oriental Bittersweet, Asian Bittersweet |
| Celastrus scandens | American Bittersweet, Climbing Bittersweet |
| Celtis occidentalis | Hackberry, Northern Hackberry, Common Hackberry |
| Cenchrus longispinus | Sandbur, Mat Sandbur, Common Sandbur |
| Centaurea cyanus | Cornflower, Bachelor's Buttons, Bluebottle, Garden Knapweed |
| Centaurea jacea | Brown Knapweed |
| Centaurea montana | Perennial Cornflower, Mountain Cornflower, Mountain Bluet, Bachelor's Button |
| Centaurea nigrescens | Alpine Knapweed |
| Centaurea solstitialis | Yellow Starthistle, St. Barbaby's Thistle, Yellow Knapweed |
| Centaurea stoebe | Spotted Knapweed |
| Centaurea X moncktonii | Meadow Knapweed |
| Centaurium pulchellum | Branching Centaury, Lesser Centaury |
| Cephalanthus occidentalis | Buttonbush |
| Cerastium arvense | Field Chickweed |
| Cerastium brachypodum | Short-stalked Chickweed, Short-stalk Mouse-ear Chickweed, Western Chickweed |
| Cerastium fontanum | Mouse-ear Chickweed, Big Chickweed |
| Cerastium nutans | Nodding Chickweed, Nodding Mouse-ear Chickweed |
| Ceratophyllum demersum | Common Coontail, Coon's-tail, Hornwort |
| Ceratophyllum echinatum | Spiny Coontail, Spineless Hornwort, Prickly Hornwort |
| Chaenorhinum minus | Dwarf Snapdragon |
| Chaiturus marrubiastrum | False Motherwort, Horehound Motherwort |
| Chamaecrista fasciculata | Partridge Pea, Showy Partridge Pea |
| Chamaedaphne calyculata | Leather-leaf |
| Chamaenerion angustifolium | Fireweed, Rosebay, Great Willowherb |
| Chamaerhodos erecta | Nuttall's Groundrose, Nuttall's Rock-rose, Nuttall's Little Rose |
| Chelidonium majus | Celandine, Greater Celandine |
| Chelone glabra | White Turtlehead |
| Chenopodium album | Lamb's-quarters, Pigweed, Fat Hen |
| Chenopodium berlandieri | Pitseed Goosefoot, Berlandier's Goosefoot, Pigweed |
| Chenopodium capitatum | Strawberry Blite, Blite Goosefoot, Strawberry Spinach |
| Chenopodium glaucum | Oak-leaved Goosefoot |
| Chenopodium pratericola | Desert Goosefoot, Narrow-leaved Goosefoot |
| Chenopodium rubrum | Red Goosefoot |
| Chenopodium simplex | Maple-leaf Goosefoot, Giant-seed Goosefoot |
| Chenopodium standleyanum | Woodland Goosefoot, Standley's Goosefoot |
| Chimaphila umbellata | Pipsissewa, Prince's-pine |
| Chrysosplenium americanum | American Golden Saxifrage, Water Mat, Water Carpet |
| Chrysosplenium iowense | Iowa Golden Saxifrage |
| Cichorium intybus | Chicory, Blue Sailors, Wild Succory, Blue Dandelion |
| Cicuta bulbifera | Bulblet-bearing Water Hemlock |
| Cicuta maculata | Water Hemlock, Spotted Water Hemlock, Spotted Cowbane |
| Cinna arundinacea | Sweet Woodreed, Stout Woodreed, Wood-reed Grass |
| Cinna latifolia | Drooping Woodreed, Slender Woodreed, Sweet Reed Grass |
| Circaea alpina | Alpine Enchanter's Nightshade, Small Enchanter's Nightshade, Dwarf Enchanter's Nightshade |
| Circaea canadensis | Enchanter's Nightshade, Broadleaf Enchanter's Nightshade |
| Cirsium altissimum | Tall Thistle, Roadside Thistle |
| Cirsium arvense | Canada Thistle, Field Thistle |
| Cirsium discolor | Field Thistle, Pasture Thistle |
| Cirsium flodmanii | Flodman's Thistle, Hollow-root Thistle, Prairie Thistle |
| Cirsium muticum | Swamp Thistle |
| Cirsium palustre | Marsh Thistle, European Swamp Thistle, Marsh Plume Thistle |
| Cirsium pumilum var. hillii | Hill's Thistle, Hollow-root Thistle |
| Cirsium vulgare | Bull Thistle |
| Cladium mariscoides | Smooth Sawgrass, Twig Rush |
| Claytonia caroliniana | Carolina Spring Beauty, Northern Spring Beauty |
| Claytonia virginica | Virginia Spring Beauty |
| Claytosmunda claytoniana | Interrupted Fern |
| Clematis occidentalis | Purple Clematis, Purple Virgin's Bower |
| Clematis virginiana | Virgin's Bower, Devil's Darning Needles |
| Clinopodium vulgare | Wild Basil, Field Basil |
| Clintonia borealis | Bluebead, Yellow Bluebead Lily, Yellow Clintonia, Corn Lily |
| Coeloglossum viride | Long-bract Frog Orchid, Long-bracted Orchid |
| Collomia linearis | Tiny Trumpet, Narrow-leaf Mountain Trumpet, Slender-leaf Collomia |
| Comandra umbellata | Bastard Toadflax |
| Comarum palustre | Marsh Cinquefoil, Purple Marshlocks, Purple Cinquefoil |
| Commelina communis | Asiatic Dayflower |
| Commelina erecta | Slender Dayflower |
| Comptonia peregrina | Sweet-fern |
| Conium maculatum | Poison Hemlock |
| Convallaria majalis | European Lily-of-the-valley |
| Convolvulus arvensis | Field Bindweed |
| Conyza canadensis | Canadian Horseweed, Canada Fleabane |
| Coptis trifolia | Three-leaf Goldthread |
| Corallorhiza maculata var. maculata | Spotted Coralroot, Summer Coralroot |
| Corallorhiza maculata var. occidentalis | Western Spotted Coralroot |
| Corallorhiza odontorhiza | Autumn Coralroot, Late Coralroot |
| Corallorhiza striata | Striped Coralroot, Hooded Coralroot |
| Corallorhiza trifida | Early Coralroot, Spring Coralroot, Yellow Coralroot, Northern Coralroot |
| Coreopsis lanceolata | Lanceleaf Coreopsis, Lance-leaf Tickseed, Sand Coreopsis |
| Coreopsis palmata | Prairie Coreopsis, Stiff Tickseed, Finger Coreopsis |
| Coreopsis tinctoria | Plains Coreopsis, Golden Tickseed, Calliopsis |
| Cornus alternifolia | Pagoda Dogwood, Alternate-leaved Dogwood |
| Cornus amomum | Silky Dogwood, Pale Dogwood, Swamp Dogwood |
| Cornus canadensis | Bunchberry, Bunchberry Dogwood, Creeping Dogwood |
| Cornus racemosa | Gray Dogwood |
| Cornus rugosa | Round-leaved Dogwood |
| Cornus sericea | Red-osier Dogwood |
| Corydalis aurea | Golden Corydalis, Scrambled Eggs |
| Corydalis micrantha | Slender Fumewort, Smallflower Corydalis |
| Corydalis sempervirens | Pale Corydalis, Rock Harlequin, Pink Corydalis |
| Corylus americana | American Hazelnut |
| Corylus cornuta | Beaked Hazelnut |
| Coryphantha vivipara | Pincushion Cactus, Spiny-star |
| Crataegus chrysocarpa | Fireberry Hawthorn, Round-leaf Hawthorn, Red Haw |
| Crataegus douglasii | Black Hawthorn, Douglas Hawthorn |
| Crataegus macracantha | Large-thorned Hawthorn, Long-thorned Hawthorn |
| Crataegus macrosperma | Large-seeded Hawthorn, Big-fruit Hawthorn, Eastern Hawthorn |
| Crataegus mollis | Downy Hawthorn, Red Haw |
| Crataegus punctata | Dotted Hawthorn, White Haw |
| Crataegus submollis | Quebec Hawthorn |
| Crataegus succulenta | Fleshy Hawthorn |
| Crepis runcinata | Fiddle-leaf Hawksbeard, Incised Hawk's-beard, Naked-stemmed Hawksbeard |
| Crepis tectorum | Narrow-leaf Hawksbeard, Yellow Hawk's Beard |
| Crocanthemum bicknellii | Hoary Frostweed |
| Crocanthemum canadense | Canada Frostweed, Common Frostweed |
| Crotalaria sagittalis | Rattlebox, Arrowhead Rattle-box |
| Croton glandulosus | Vente Conmigo, Tropic Croton, Glandular Croton, Sand Croton, Northern Croton |
| Cryptogramma stelleri | Slender Cliff Brake, Slender Rock-brake |
| Cryptotaenia canadensis | Canadian Honewort |
| Cubelium concolor | Eastern Green Violet |
| Cuscuta cephalanthi | Buttonbush Dodder |
| Cuscuta glomerata | Rope Dodder, Aster Dodder |
| Cuscuta gronovii | Swamp Dodder, Common Dodder |
| Cuscuta pentagona | Field Dodder, Prairie Dodder, Five-angled Dodder, Bushclover Dodder |
| Cyclachaena xanthiifolia | Giant Sumpweed, Marsh Elder, False Ragweed |
| Cycloloma atriplicifolium | Winged Pigweed |
| Cynanchum louiseae | Black Swallow-wort, Black Dog-strangling Vine |
| Cynoglossum officinale | Gypsy Flower, Hound's-tongue |
| Cynoglossum virginianum | Wild Comfrey, Northern Wild Comfrey, Wild Hound's-tongue |
| Cyperus acuminatus | Tapertip Flatsedge, Short-pointed Umbrella-sedge, Taperleaf Flatsedge |
| Cyperus bipartitus | Shining Flatsedge, Slender Flatsedge, Brook Nutsedge |
| Cyperus diandrus | Umbrella Flatsedge, Slender Flatsedge |
| Cyperus engelmannii | Engelmann's Flatsedge |
| Cyperus erythrorhizos | Red-root Flatsedge |
| Cyperus esculentus | Yellow Nutsedge, Chufa Nutsedge, Earth Almond, Tiger Nut |
| Cyperus fuscus | Brown Flatsedge, Brown Galingale |
| Cyperus houghtonii | Houghton's Flatsedge, Houghton's Sand Sedge |
| Cyperus lupulinus | Slender Nutsedge, Great Plains Flatsedge, Slender Sand Sedge |
| Cyperus odoratus | Fragrant Flatsedge, Rusty Flatsedge |
| Cyperus schweinitzii | Schweinitz's Flatsedge, Schweinitz's Nutsedge |
| Cyperus squarrosus | Bearded Flatsedge, Awned Flatsedge, Awned Umbrella-sedge |
| Cyperus strigosus | Straw-colored Flatsedge, Straw-colored Umbrella Sedge |
| Cyperus subsquarrosus | Dwarf Bulrush, Small-flowered Hemicarpha, Small-flower Halfchaff Sedge |
| Cypripedium acaule | Stemless Lady's-slipper, Pink Moccasin-flower, Small Pink Lady's-slipper |
| Cypripedium arietinum | Ram's-head Lady's-slipper, Ram's-head Moccasin Flower |
| Cypripedium candidum | Small White Lady's-slipper, White Moccasin-flower |
| Cypripedium parviflorum var. makasin | Small Yellow Lady's-slipper, Lesser Yellow Lady's-slipper |
| Cypripedium parviflorum var. pubescens | Greater Yellow Lady's-slipper, Large Yellow Lady's Slipper |
| Cypripedium reginae | Showy Lady's-slipper |
| Cystopteris bulbifera | Bulblet Fern, Bulblet Bladderfern, Bulblet Fragile Fern |
| Cystopteris fragilis | Fragile Fern, Brittle Bladderfern, Northern Fragile Fern |
| Cystopteris laurentiana | Laurentian Fragile Fern, Laurentian Bladderfern, Laurentian Bulblet Fern, St. Lawrence Bladderfern, Hybrid Bladder Fern |
| Cystopteris protrusa | Southern Fragile Fern, Lowland Bladder Fern, Southern Bladder Fern, Protruding Fragile Fern |
| Cystopteris tenuis | Mackay's Fragile Fern, Mackay's Brittle Fern, Upland Brittle Bladderfern |
| Dactylis glomerata | Orchard Grass, Cock's-foot |
| Dalea candida | White Prairie Clover |
| Dalea leporina | Foxtail Prairie Clover, Foxtail Dalea |
| Dalea purpurea | Purple Prairie Clover |
| Dalea villosa | Silky Prairie Clover, Downy Prairie Clover |
| Danthonia spicata | Poverty Grass, Poverty Oat-grass |
| Dasiphora fruticosa | Shrubby Cinquefoil |
| Datura stramonium | Jimsonweed, Thorn-apple, Devil's Snare, Devil's Trumpet |
| Datura wrightii | Sacred Thorn-apple, Sacred Datura, Western Jimsonweed, Angel's Trumpet, Indian Apple, Moonflower |
| Daucus carota | Queen Anne's Lace, Wild Carrot, Bird's Nest |
| Decodon verticillatus | Swamp Loosestrife, Water Willow |
| Delphinium carolinianum | Carolina Larkspur, Prairie Larkspur |
| Dendrolycopodium dendroideum | Tree Clubmoss, Prickly Tree Ground-pine, Round-branched Groundpine, Princess Pine |
| Dendrolycopodium hickeyi | Hickey's Clubmoss, Hickey's Tree Clubmoss, Pennsylvania Clubmoss, Princess Pine |
| Dendrolycopodium obscurum | Flat-branched Tree Clubmoss, Flat-branched Ground Pine, Princess Pine |
| Deparia acrostichoides | Silvery Spleenwort, Silvery Glade Fern |
| Deschampsia cespitosa | Tufted Hairgrass |
| Deschampsia flexuosa | Wavy Hairgrass, Crinkled Hairgrass, Slender Hairgrass |
| Descurainia pinnata | Tansy Mustard, Pinnate Tansy Mustard, Western Tansy Mustard |
| Descurainia sophia | Herb Sophia, Flixweed |
| Desmanthus illinoensis | Prairie Mimosa, Illinois Bundleflower, Prairie Bundle-flower |
| Desmodium canadense | Showy Tick-trefoil, Hoary Tick-trefoil, Canada Tick-clover |
| Desmodium cuspidatum | Large-bract Tick-trefoil, Big Tick Trefoil |
| Desmodium glutinosum | Pointed-leaf Tick-trefoil, Large-flower tickclover |
| Desmodium illinoense | Illinois Tick-trefoil |
| Desmodium nudiflorum | Naked-flower Tick-trefoil, Stemless Tick-trefoil, Naked-stem Tick-trefoil |
| Dianthus armeria | Deptford Pink |
| Dianthus barbatus | Sweet William |
| Dianthus deltoides | Maiden Pink |
| Diarrhena obovata | Obovate Beakgrain, American Beakgrain, Hairy Beakgrain, American Beak-grass |
| Dicentra canadensis | Squirrel Corn |
| Dicentra cucullaria | Dutchman's Breeches |
| Dichanthelium boreale | Northern Panic Grass, Northern Rosette Grass |
| Dichanthelium latifolium | Broad-leaved Panic Grass, Broad-leaved Rosette Grass |
| Dichanthelium leibergii | Leiberg's Panic Grass, Leiberg's Rosette Grass |
| Dichanthelium scribnerianum | Scribner's Panic Grass, Scribner's Rosette Grass, Scribner's Panicum |
| Dichanthelium xanthophysum | Slender Panic Grass, Slender Rosette Grass, Yellow Panic Grass, Pale Panic-grass, Pale-leaved Rosette-panicgrass, Slender Panicum |
| Diervilla lonicera | Bush Honeysuckle, Dwarf Bush Honeysuckle, Northern Honeysuckle, |
| Digitalis grandiflora | Yellow Foxglove |
| Digitalis lanata | Grecian Foxglove, Woolly Foxglove |
| Digitaria cognata | Fall Witch Grass, Mountain Hairgrass, Carolina Crabgrass |
| Digitaria ischaemum | Smooth Crabgrass |
| Digitaria sanguinalis | Hairy Crabgrass, Large Crabgrass, Common Crabgrass |
| Dioscorea villosa | Wild Yam, Yam-root, Colic Root |
| Diphasiastrum complanatum | Northern Groundcedar, Northern Running-pine, Flat-stemmed Clubmoss |
| Diphasiastrum digitatum | Southern Groundcedar, Fan Clubmoss, Trailing Ground-pine |
| Diphasiastrum tristachyum | Blue Groundcedar, Wirey Groundcedar, Deep-root Clubmoss |
| Diplachne fusca | Bearded Sprangletop, Salt Meadow Grass |
| Dipsacus fullonum | Common Teasel, Fuller's Teasel |
| Dipsacus laciniatus | Cut-leaf Teasel |
| Dirca palustris | Leatherwood, Eastern Leatherwood |
| Distichlis spicata | Saltgrass, Desert Saltgrass, Inland Salt Grass, Coastal Saltgrass |
| Dodecatheon amethystinum | Jeweled Shooting Star, Amethyst Shooting Star |
| Dodecatheon meadia | Prairie Shooting Star, Pride-of-Ohio |
| Doellingeria umbellata | Flat-topped White Aster, Flat-top Aster, Parasol Whitetop |
| Draba arabisans | Rock Whitlow-grass, Arabian Whitlow-grass |
| Draba cana | Hoary Whitlow-grass, Hoary Draba |
| Draba nemorosa | Yellow Whitlow-grass, Woodland Draba, Yellow Whitlow-wort |
| Draba reptans | Carolina Whitlow-grass, Carolina Draba |
| Draba verna | Spring Whitlow-grass |
| Dracocephalum parviflorum | American Dragonhead |
| Drosera anglica | English Sundew |
| Drosera intermedia | Spoon-leaf Sundew, Spatulate-leaved Sundew |
| Drosera linearis | Linear-leaved Sundew, Slender-leaf Sundew |
| Drosera rotundifolia | Round-leaved Sundew |
| Drymocallis arguta | Tall Cinquefoil, Prairie Cinquefoil |
| Dryopteris carthusiana | Spinulose Wood Fern, Spinulose Shield Fern, Toothed Wood Fern |
| Dryopteris cristata | Crested Fern, Crested Shield Fern, Crested Wood Fern |
| Dryopteris expansa | Spreading Wood Fern, Northern Wood Fern |
| Dryopteris fragrans | Fragrant Fern, Fragrant Wood Fern, Fragrant Shield Fern, Fragrant Cliff Fern |
| Dryopteris goldiana | Goldie's Fern, Giant Wood Fern |
| Dryopteris intermedia | Glandular Wood Fern, Intermediate Wood Fern, Fancy Wood Fern |
| Dryopteris marginalis | Marginal Shield Fern, Marginal Wood Fern, Eastern Wood Fern |
| Dulichium arundinaceum | Three-way Sedge, Dwarf Bamboo |
| Dysphania botrys | Jerusalem Oak, Sticky Goosefoot, Feather Geranium |
| Dyssodia papposa | Fetid Marigold, Prairie Dogweed, False Dog-fennel |
| Echinacea angustifolia | Narrow-leaved Purple Coneflower, Black-samson Echinacea |
| Echinacea pallida | Pale Purple Coneflower, Pale Echinaceae |
| Echinacea purpurea | Eastern Purple Coneflower |
| Echinochloa crus-galli | Barnyard Grass, Large Barnyard Grass, Cockspur Barnyard Grass, Barnyard Millet |
| Echinochloa muricata | Rough Barnyard Grass, American Barnyard Grass, Awned Barnyard Grass |
| Echinochloa walteri | Walter's Barnyard Grass, Coast Cockspur Grass, Coast Barnyard Grass, Long-Awn Cock's-Spur Grass |
| Echinocystis lobata | Wild Cucumber |
| Echium vulgare | Viper's Bugloss, Blueweed |
| Eclipta prostrata | Yerba-de-tajo, False Daisy |
| Elaeagnus angustifolia | Russian Olive |
| Elaeagnus commutata | Silverberry, Wolf Willow |
| Elaeagnus umbellata | Autumn Olive |
| Eleocharis acicularis | Needle Spikerush, Least Spikerush, Needle Spike-sedge, Dwarf Hairgrass |
| Eleocharis compressa | Flatstem Spikerush, Flattened Spikerush, Flat-stemmed Spike-sedge |
| Eleocharis elliptica | Elliptic Spikerush |
| Eleocharis engelmannii | Englemann's Spikerush, Engelmann's Spikesedge |
| Eleocharis erythropoda | Bald Spikerush, Red-footed Spike-sedge |
| Eleocharis flavescens | Bright Green Spikerush, Olivaceous Spikerush, Yellow Spike-sedge, Capitate Spikerush |
| Eleocharis intermedia | Intermediate Spikerush, Matted Spikerush, Mudflat Spike-sedge |
| Eleocharis macrostachya | Pale Spikerush, Large-spike Spikerush |
| Eleocharis nitida | Neat Spikerush, Quill Spikerush, Slender Spikerush, Quill Spike-sedge |
| Eleocharis obtusa | Blunt Spikerush, Blunt Spike-sedge |
| Eleocharis ovata | Ovate Spikerush, Ovoid Spike-sedge |
| Eleocharis palustris | Common Spikerush, Common Spike-sedge |
| Eleocharis quinqueflora | Few-flowered Spikerush, Few-flowered Spike-sedge |
| Eleocharis robbinsii | Robbins' Spikerush |
| Eleocharis rostellata | Beaked Spikerush, Beaked Spike-sedge, Walking Sedge |
| Eleocharis wolfii | Wolf's Spikerush |
| Ellisia nyctelea | Aunt Lucy, Waterpod |
| Elymus canadensis | Canada Wild Rye, Nodding Wild Rye, Great Plains Wild Rye |
| Elymus curvatus | Awnless Wild Rye, Short-awned Wild Rye |
| Elymus hystrix | Bottlebrush Grass, Eastern Bottlebrush Grass |
| Elymus repens | Quackgrass, Couchgrass |
| Elymus riparius | Riverbank Wild Rye, Eastern Riverbank Wild Rye, River Wild Rye |
| Elymus trachycaulus | Slender Wheatgrass |
| Elymus villosus | Silky Wild Rye, Hairy Wild Rye, Downy Wild Rye |
| Elymus virginicus | Virginia Wild Rye |
| Elymus wiegandii | Wiegand's Wild Rye |
| Empetrum nigrum | Black Crowberry |
| Enemion biternatum | False Rue Anemone |
| Epigaea repens | Trailing Arbutus, Mayflower, Ground Laurel |
| Epilobium ciliatum | Fringed Willowherb, American Willowherb, Northern Willowherb, Common Willowherb |
| Epilobium coloratum | Purple-leaf Willowherb, Cinnamon Willowherb, Eastern Willowherb |
| Epilobium leptophyllum | Bog Willowherb, Narrow-leaved Willowherb, Linear-leaved Willowherb |
| Epilobium strictum | Downy Willowherb |
| Epipactis helleborine | Helleborine, Broad-leaved Helleborine |
| Equisetum arvense | Field Horsetail, Common Horsetail |
| Equisetum fluviatile | Water Horsetail |
| Equisetum laevigatum | Smooth Scouring Rush |
| Equisetum palustre | Marsh Horsetail |
| Equisetum praealtum | Tall Scouring Rush, Common Scouring Rush, Rough Horsetail |
| Equisetum pratense | Meadow Horsetail |
| Equisetum scirpoides | Dwarf Scouring Rush, Dwarf Horsetail |
| Equisetum sylvaticum | Woodland Horsetail, Wood Horsetail |
| Equisetum variegatum | Variegated Scouring Rush |
| Eragrostis cilianensis | Stink Grass, Stinking Lovegrass |
| Eragrostis frankii | Sandbar Lovegrass, Frank's Lovegrass |
| Eragrostis hypnoides | Creeping Lovegrass, Teal Love Grass |
| Eragrostis minor | Little Lovegrass, Smaller Stinkgrass |
| Eragrostis pectinacea | Tufted Lovegrass, Carolina Lovegrass |
| Eragrostis spectabilis | Purple Lovegrass, Tumble Grass |
| Eragrostis trichodes | Sand Lovegrass |
| Erechtites hieraciifolius | Pilewort, American Burnweed, Fireweed |
| Erigeron acris | Bitter Fleabane, Blue Fleabane |
| Erigeron annuus | Annual Fleabane, Eastern Daisy Fleabane |
| Erigeron glabellus | Smooth Fleabane, Streamside Fleabane |
| Erigeron philadelphicus | Philadelphia Fleabane, Common Fleabane |
| Erigeron pulchellus | Robin's Plantain, Poor Robin's Fleabane |
| Erigeron strigosus | Prairie Fleabane, Daisy Fleabane, Rough Fleabane |
| Eriocaulon aquaticum | Common Pipewort, Seven-angle Pipewort |
| Eriochloa villosa | Hairy Cupgrass, Woolly Cupgrass |
| Eriophorum angustifolium | Tall Cottongrass, Common Cottongrass, Tall Cotton-sedge |
| Eriophorum gracile | Slender Cottongrass |
| Eriophorum russeolum | Russet Cottongrass, Red Cottongrass, Rusty Cotton-grass |
| Eriophorum tenellum | Few-nerved Cottongrass, Delicate Cottongrass, Few-nerved Cotton-sedge |
| Eriophorum vaginatum | Tussock Cottongrass, Tussock Cotton-sedge |
| Eriophorum virginicum | Tawny Cottongrass, Tawny Cotton-sedge |
| Eriophorum viridicarinatum | Green-keeled Cottongrass, Thin-leaf Cotton-sedge, Tassel Cotton-grass, |
| Erucastrum gallicum | Dog Mustard, Hairy Rocket |
| Eryngium yuccifolium | Rattlesnake Master, Button Eryngo, Button Snakeroot |
| Erysimum asperum | Western Wallflower |
| Erysimum cheiranthoides | Wormseed Wallflower, Worm-seed Mustard, Treacle Mustard |
| Erysimum inconspicuum | Small-flowered Wallflower |
| Erythronium albidum | White Trout Lily, White Fawn Lily, White Dog-tooth Violet, White Adder's Tongue |
| Erythronium americanum | Yellow Trout Lily, Yellow Adder's-tongue, Dogtooth Violet |
| Erythronium propullans | Dwarf Trout Lily, Minnesota Dwarf Trout Lily, Minnesota Fawnlily, Minnesota Adder's-tongue |
| Euonymus alatus | Winged Burning-bush, Winged Euonymus, Winged Spindle-tree |
| Euonymus atropurpureus | Eastern Wahoo, Burning-bush, Spindle-tree |
| Eupatorium altissimum | Tall Boneset, Tall Thoroughwort |
| Eupatorium perfoliatum | Common Boneset |
| Eupatorium sessilifolium | Upland Boneset, Upland Thoroughwort |
| Euphorbia corollata | Flowering Spurge |
| Euphorbia cyathophora | Painted Leaf, Wild Poinsettia, Fire-on-the-mountain |
| Euphorbia cyparissias | Cypress Spurge, Graveyard-weed |
| Euphorbia davidii | David's Spurge |
| Euphorbia geyeri | Geyer's Spurge, Geyer's Sandmat, Dune Spurge |
| Euphorbia glyptosperma | Ridge-seed Spurge, Rib-seed Sandmat |
| Euphorbia maculata | Spotted Spurge, Prostrate Spurge, Spotted Sandmat |
| Euphorbia marginata | Snow-on-the-mountain |
| Euphorbia nutans | Nodding Spurge, Eyebane, Spotted Spurge |
| Euphorbia prostrata | Prostrate Spurge |
| Euphorbia serpillifolia | Thyme-leaved Spurge, Thyme-leaf Sandmat |
| Euphorbia spathulata | Warty Spurge, Prairie Spurge, Blunt-leaved Spurge, Reticulate-seeded Spurge |
| Euphorbia virgata | Leafy Spurge |
| Euphrasia hudsoniana | Hudson Bay Eyebright |
| Euphrasia officinalis | Tartary Eyebright, European Eyebright |
| Eurybia macrophylla | Large-leaved Aster, Big-leaf Aster |
| Euthamia graminifolia | Grass-leaved Goldenrod, Flat-top Goldentop, Lance-leaved Goldenrod |
| Euthamia gymnospermoides | Great Plains Goldenrod, Texas Goldentop, Viscid Goldenrod |
| Eutrochium maculatum | Spotted Joe-pye Weed, Purple Boneset, Spotted Trumpetweed |
| Eutrochium purpureum | Sweet Scented Joe Pye Weed, Sweet Joe-Pye Weed |
| Fagopyrum esculentum | Buckwheat |
| Fallopia cilinodis | Fringed Black-bindweed, Fringed False Buckwheat |
| Fallopia convolvulus | Black-bindweed |
| Fallopia scandens | Climbing False Buckwheat |
| Festuca rubra | Red Fescue |
| Festuca saximontana | Rocky Mountain Fescue, Mountain Fescue |
| Festuca subverticillata | Nodding Fescue |
| Festuca trachyphylla | Hard Fescue, Sheep Fescue, Long-leaved Fescue |
| Ficaria verna | Lesser Celandine, Fig Crowfoot, Fig Buttercup, Eurasian Buttercup |
| Filipendula ulmaria | Queen-of-the-meadow, Meadowsweet |
| Fimbristylis autumnalis | Slender Fimbry, Autumn Fimbry |
| Floerkea proserpinacoides | False Mermaid |
| Fragaria vesca | Woodland Strawberry, American Wood Strawberry |
| Fragaria virginiana | Wild Strawberry, Common Strawberry, Virginia Strawberry |
| Frangula alnus | Glossy Buckthorn, Columnar Buckthorn, Fen Buckthorn, European Buckthorn, Alder Buckthorn |
| Fraxinus americana | White Ash |
| Fraxinus nigra | Black Ash |
| Fraxinus pennsylvanica | Green Ash |
| Froelichia floridana | Prairie Cottonweed, Plains Snakecotton, Florida Snake-cotton, Field Snake-cotton |
| Gaillardia aristata | Blanketflower, Common Gaillardia, Great Blanket-flower |
| Galearis spectabilis | Showy Orchis, Showy Orchid |
| Galeopsis tetrahit | Brittlestem Hemp-nettle, Common Hemp-nettle |
| Galinsoga parviflora | Small-flowered Galinsoga, Gallant Soldier, Little-flower Quickweed |
| Galinsoga quadriradiata | Shaggy Soldier, Hairy galinsoga, Quick Weed, Peruvian Daisy |
| Galium aparine | Sticky-willy, Cleavers, Catchweed Bedstraw, Goose-grass |
| Galium asprellum | Rough Bedstraw |
| Galium boreale | Northern Bedstraw |
| Galium circaezans | Licorice Bedstraw, Wild Licorice |
| Galium concinnum | Shining Bedstraw |
| Galium labradoricum | Labrador Bedstraw, Northern Bog Bedstraw |
| Galium mollugo | False Baby's Breath, Smooth Bedstraw, Hedge Bedstraw, Whorled Bedstraw |
| Galium obtusum | Bluntleaf Bedstraw, Wild Madder, Obtuse Bedstraw |
| Galium tinctorium | Stiff Marsh Bedstraw, Clayton's Bedstraw, Wild Madder, Southern Three-lobed Bedstraw |
| Galium trifidum | Three-petal Bedstraw, Northern Three-lobed Bedstraw, Small Bedstraw |
| Galium triflorum | Fragrant Bedstraw, Sweet-scented Bedstraw |
| Galium verum | Yellow Bedstraw, Lady's Bedstraw |
| Gaultheria hispidula | Creeping Snowberry |
| Gaultheria procumbens | Wintergreen, Eastern Teaberry, Checkerberry |
| Gaylussacia baccata | Black Huckleberry |
| Gentiana affinis | Pleated Gentian, Northern Gentian, Rocky Mountain Gentian, Prairie Gentian |
| Gentiana andrewsii | Bottle Gentian, Closed Bottle Gentian, Andrew's Gentian |
| Gentiana flavida | Yellow Gentian, Cream Gentian, Pale Gentian, Plain Gentian |
| Gentiana puberulenta | Downy Gentian, Prairie Gentian |
| Gentiana rubricaulis | Great Lakes Gentian, Closed Gentian, Red-stemmed Gentian |
| Gentianella quinquefolia | Stiff Gentian, Ague-weed |
| Gentianopsis crinita | Greater Fringed Gentian |
| Gentianopsis virgata | Lesser Fringed Gentian, Smaller Fringed Gentian |
| Geocaulon lividum | Northern Comandra, False Toadflax, Timberberry, Pumpkinberry, Red-fruited Bastard Toadflax |
| Geranium bicknellii | Bicknell's Cranesbill, Northern Cranesbill |
| Geranium carolinianum | Carolina Cranesbill, Carolina Geranium |
| Geranium maculatum | Wild Geranium, Spotted Geranium, Spotted Cranesbill, Wild Cranesbill Alumroot |
| Geranium sibiricum | Siberian Cranesbill |
| Geum aleppicum | Yellow Avens |
| Geum canadense | White Avens |
| Geum laciniatum | Rough Avens |
| Geum macrophyllum | Large-leaf Avens |
| Geum rivale | Purple Avens, Water Avens |
| Geum triflorum | Prairie Smoke, Old Man's Whiskers |
| Geum vernum | Spring Avens |
| Glechoma hederacea | Ground Ivy, Creeping Charlie, Gill-over-the-Ground |
| Gleditsia triacanthos | Honey Locust |
| Glyceria borealis | Northern Manna Grass, Small Floating Mannagrass |
| Glyceria canadensis | Rattlesnake Manna Grass |
| Glyceria grandis | American Manna Grass, Reed Mannagrass, Tall Manna Grass |
| Glyceria striata | Fowl Manna Grass, Pale Manna Grass |
| Glycyrrhiza lepidota | Wild Licorice, American Licorice |
| Gnaphalium uliginosum | Low Cudweed, Marsh Cudweed |
| Goodyera pubescens | Downy Rattlesnake Plantain |
| Goodyera repens | Lesser Rattlesnake Plantain, Dwarf Rattlesnake Plantain |
| Goodyera tesselata | Tesselated Rattlesnake Plantain, Checkered Rattlesnake Plantain |
| Gratiola neglecta | Clammy Hedge-hyssop, Disk Hyssop |
| Grindelia squarrosa | Gumweed, Curlycup Gumweed, Curly-top Gumweed |
| Gymnocarpium continentale | Nahanni Oak Fern |
| Gymnocarpium dryopteris | Common Oak Fern, Northern Oak Fern |
| Gymnocarpium robertianum | Northern Oak Fern, Limestone Oak Fern |
| Gymnocladus dioicus | Kentucky Coffee Tree |
| Gypsophila muralis | Low Baby's Breath, Wall Baby's Breath, Annual Gypsophila |
| Gypsophila paniculata | Baby's Breath, Panicled Baby's-breath, Tall Baby's Breath |
| Hackelia deflexa | Nodding Stickseed, American Stickseed |
| Hackelia virginiana | Virginia Stickseed, Beggar's-lice, Sticktight |
| Halenia deflexa | American Spurred Gentian, Green Gentian |
| Hamamelis virginiana | Witch Hazel |
| Hammarbya paludosa | Bog Adder's-mouth |
| Hasteola suaveolens | Sweet-smelling Indian Plantain |
| Hedeoma hispida | Rough False Pennyroyal, Mock Pennyroyal |
| Helenium autumnale | Sneezeweed, Common Sneezeweed, Sneezewort, Swamp Sunflower |
| Helianthus annuus | Common Sunflower |
| Helianthus giganteus | Giant Sunflower, Tall Sunflower, Swamp Sunflower |
| Helianthus grosseserratus | Sawtooth Sunflower |
| Helianthus hirsutus | Hairy Sunflower, Stiff-haired Sunflower, Whiskered Sunflower, Hispid Sunflower |
| Helianthus maximiliani | Maximilian Sunflower |
| Helianthus nuttallii | Nuttall's Sunflower |
| Helianthus occidentalis | Few-leaf Sunflower, Naked-stem Sunflower, Western Sunflower |
| Helianthus pauciflorus | Stiff Sunflower, Prairie Sunflower, Few-leaved Sunflower |
| Helianthus petiolaris | Prairie Sunflower, Plains Sunflower |
| Helianthus strumosus | Woodland Sunflower, Pale-leaved Sunflower |
| Helianthus tuberosus | Jerusalem Artichoke |
| Heliopsis helianthoides | Smooth Oxeye, Common Ox-eye, False Sunflower, Sunflower Heliopsis |
| Hemerocallis fulva | Day Lily, Orange Daylily |
| Heracleum maximum | Common Cow Parsnip, American Cow-parsnip |
| Hesperis matronalis | Dame's Rocket |
| Hesperostipa comata | Needle-and-thread Grass |
| Hesperostipa curtiseta | Western Porcupine Grass, Small Porcupine Grass, Short-awned Porcupine Grass, Short-bristle Needle-and-thread Grass |
| Hesperostipa spartea | Porcupine grass, Needlegrass |
| Heteranthera dubia | Water Star-grass, Grass-leaf Mud-plantain |
| Heteranthera limosa | Blue Mud Plantain, Ducksalad |
| Heterotheca villosa | Hairy False Goldenaster, Hairy Golden-aster |
| Heuchera richardsonii | Prairie Alumroot, Richardson's Alumroot |
| Hibiscus laevis | Halberd-leaved Rose Mallow, Smooth Rose Mallow |
| Hibiscus trionum | Flower of an Hour |
| Hieracium aurantiacum | Orange Hawkweed, Devil's Paintbrush |
| Hieracium caespitosum | Meadow Hawkweed, Yellow King-devil, Field Hawkweed |
| Hieracium longipilum | Hairy Hawkweed, Long-bearded Hawkweed |
| Hieracium pilosella | Mouse-ear Hawkweed |
| Hieracium piloselloides | Glaucous King-devil, Smooth Hawkweed, Tall Hawkweed, King-devil Hawkweed |
| Hieracium scabrum | Sticky Hawkweed, Rough Hawkweed |
| Hieracium umbellatum | Narrow-leaf Hawkweed, Canada Hawkweed, Rough Hawkweed, Northern Hawkweed |
| Hippuris vulgaris | Mare's Tail, Common Mare's-tail |
| Homalosorus pycnocarpos | Narrow-leaved Spleenwort, Narrow-leaved Glade Fern |
| Hordeum jubatum | Foxtail Barley, Squirrel-tail Grass, Squirrel-tail Barley |
| Hordeum pusillum | Little Barley |
| Houstonia longifolia | Long-leaf Bluets, Long-leaf Houstonia, Long-leaf Summer Bluet |
| Hudsonia tomentosa | Beach Heather, Woolly Beach-heather, False Heather, Woolly Hudsonia, Poverty Grass |
| Humulus japonicus | Hooked Hair Hops, Japanese Hops |
| Humulus lupulus | Common Hops, American Hops |
| Huperzia appressa | Appalachian Firmoss, Mountain Fir-moss |
| Huperzia lucidula | Shining Firmoss, Shining Clubmoss |
| Huperzia porophila | Rock Firmoss, Rock Clubmoss |
| Huperzia selago | Northern Firmoss, Fir Clubmoss, Mountain Clubmoss |
| Hydrastis canadensis | Golden Seal |
| Hydrocotyle americana | American Water Pennywort, American Marsh-pennywort |
| Hydrocotyle ranunculoides | Floating Pennywort, Buttercup Pennywort, Floating Marsh-pennywort, Water Pennywort |
| Hydrophyllum appendiculatum | Appendaged Waterleaf, Great Waterleaf |
| Hydrophyllum virginianum | Virginia Waterleaf, Eastern Waterleaf |
| Hylotelephium telephium | Orpine, Live-forever, Witch's Moneybags |
| Hypericum ascyron | Great St. Johnswort, Giant St. John's-wort |
| Hypericum boreale | Northern St. John's-wort |
| Hypericum ellipticum | Pale St. John's-wort, Elliptic-leaved St. John's-wort, Creeping St. John's-wort |
| Hypericum kalmianum | Kalm's St. John's-wort |
| Hypericum majus | Larger Canadian St. Johnswort, Greater St Johnswort |
| Hypericum perforatum | Common St. Johnswort, Klamath-weed |
| Hypericum punctatum | Spotted St. John's-wort |
| Hypopitys monotropa | Pinesap, False Beech Drops, Yellow Bird's-Nest |
| Hypoxis hirsuta | Yellow Star-grass, Yellow-eyed Grass, Common Goldstar |
| Ilex mucronata | Swamp Holly, Catberry, Mountain Holly |
| Ilex verticillata | Winterberry, Common Winterberry Holly |
| Impatiens balfourii | Balfour's Touch-me-not, Kashmir Balsam, Poor Man's Orchid |
| Impatiens capensis | Spotted Touch-me-not, Jewelweed |
| Impatiens pallida | Pale Touch-me-not, Yellow Jewelweed, Yellow Touch-me-not |
| Inula helenium | Elecampane, Horse Yellowhead |
| Iodanthus pinnatifidus | Purple Rocket |
| Iris pseudacorus | Pale-yellow Iris, Yellow Flag |
| Iris versicolor | Harlequin Blueflag, Blueflag Iris, Northern Blueflag |
| Iris virginica | Southern Blueflag, Virginia Iris |
| Isoetes echinospora | Spiny-spore Quillwort, Spiny Quillwort, Spring Quillwort, Braun's Quillwort |
| Isoetes melanopoda | Prairie Quillwort, Black-foot Quillwort |
| Jeffersonia diphylla | Twinleaf |
| Juglans cinerea | Butternut, White Walnut |
| Juglans nigra | Black Walnut |
| Juncus alpinoarticulatus | Northern Green Rush, Alpine Rush |
| Juncus articulatus | Jointed Rush, Joint-leaf Rush |
| Juncus balticus | Baltic Rush, Mountain Rush |
| Juncus brevicaudatus | Narrow-panicled Rush, Short-tailed Rush |
| Juncus bufonius | Toad Rush |
| Juncus canadensis | Canada Rush |
| Juncus compressus | Round-fruited Rush, Flattened Rush, Compressed Rush |
| Juncus dudleyi | Dudley's Rush |
| Juncus effusus | Soft Rush, Common Rush |
| Juncus filiformis | Thread Rush |
| Juncus greenei | Greene's Rush |
| Juncus interior | Inland Rush |
| Juncus longistylis | Long-styled Rush |
| Juncus marginatus | Grassleaf Rush, Marginated Rush |
| Juncus nodosus | Knotted Rush, Knotty Rush, Joint Rush |
| Juncus pelocarpus | Brown-fruit Rush |
| Juncus stygius | Bog Rush, Moor Rush |
| Juncus tenuis | Path Rush, Poverty Rush, Slender Rush |
| Juncus torreyi | Torrey's Rush |
| Juncus vaseyi | Vasey's Rush |
| Juniperus communis | Common Juniper |
| Juniperus horizontalis | Creeping Juniper |
| Juniperus virginiana | Eastern Red Cedar |
| Kalmia polifolia | Bog Laurel, Pale Laurel, Swamp-laurel |
| Knautia arvensis | Field Scabious, Bluebuttons |
| Koeleria macrantha | Junegrass |
| Krigia biflora | Two-flowered Cynthia, Two-flowered False Dandelion, Orange Dwarf Dandelion |
| Lactuca biennis | Tall Blue Lettuce, Blue Wood Lettuce, Biennial Blue Lettuce |
| Lactuca canadensis | Wild Lettuce, Canada Lettuce, Tall Lettuce |
| Lactuca floridana | Woodland Lettuce, Florida Lettuce |
| Lactuca ludoviciana | Louisiana Lettuce, Prairie Lettuce, Western Wild Lettuce |
| Lactuca serriola | Prickly Lettuce |
| Lamiastrum galeobdolon | Yellow Archangel, Yellow Deadnettle, Yellow Henbit |
| Lamium amplexicaule | Henbit, Henbit Deadnettle |
| Laportea canadensis | Canadian Wood Nettle |
| Lappula occidentalis | Western Stickseed, Flatspine Stickseed, Flatspine Sheepburr, Redowski's Stickseed |
| Lappula squarrosa | European Stickseed, Two-row Stickseed, Bristly Sheepburr, Bluebur |
| Lapsana communis | Common Nipplewort |
| Larix decidua | European Larch, Common Larch |
| Larix laricina | Tamarack, American Larch |
| Lathyrus japonicus | Beach Pea |
| Lathyrus ochroleucus | Cream Pea, Pale Vetchling, Pale Pea, Cream Peavine |
| Lathyrus palustris | Marsh Vetchling, Marsh Pea, Wild Pea |
| Lathyrus sylvestris | Narrow-leaved Everlasting Pea, Everlasting Pea, Narrow-leaved Vetchling, Perennial Pea, Flat Pea, Flat Peavine |
| Lathyrus tuberosus | Earthnut Pea, Tuberous Vetchling, Tuberous Pea, Earth Chestnut, Earthnut Peavine, Tuberous Sweetpea |
| Lathyrus venosus | Veiny Pea, Bushy Vetchling, Forest Pea |
| Lechea stricta | Prairie Pinweed, Bushy Pinweed |
| Lechea tenuifolia | Narrowleaf Pinweed, Slender Pinweed |
| Leersia lenticularis | Catchfly Grass |
| Leersia oryzoides | Rice Cutgrass |
| Leersia virginica | White Grass, White Cutgrass, Virginia Cutgrass |
| Lemna minor | Common Duckweed, Lesser Duckweed |
| Lemna trisulca | Star Duckweed, Ivy-leaved Duckweed, Forked Duckweed |
| Lemna turionifera | Turion Duckweed, Red Duckweed |
| Leonurus cardiaca | Motherwort |
| Leonurus sibiricus | Siberian Motherwort, Honeyweed, Marihuanilla, Little Marijuana |
| Lepidium densiflorum | Green-flowered Peppergrass, Common Pepperweed, Prairie Pepperweed, Miner's Pepperwort |
| Lepidium draba | White-top, Hoary Cress, Heart-podded Pepperweed |
| Lepidium virginicum | Virginia Peppergrass, Virginia Pepperweed, Poor-man's Pepperweed, Poorman's Pepperwort, Common Peppergrass, Virginia Peppercress |
| Lespedeza capitata | Round-headed Bush Clover, Rabbit foot, Roundhead Lespedeza |
| Lespedeza leptostachya | Prairie Bush Clover, Prairie Lespedeza, Slender-spike Lespedeza |
| Leucanthemella serotina | Giant Daisy |
| Leucanthemum vulgare | Ox-eye Daisy, Common Daisy, Marguerite |
| Leucophysalis grandiflora | Large False Ground Cherry, White-flowered Ground-cherry, Large-flowered Ground-cherry |
| Liatris aspera | Rough Blazing Star, Tall Blazing Star, Gayfeather |
| Liatris cylindracea | Cylindric Blazing Star, Ontario Blazing Star, Barrelhead Gayfeather |
| Liatris ligulistylis | Northern Plains Blazing Star, Northern Plains Gayfeather, Rocky Mountain Blazing Star, Meadow Blazing Star |
| Liatris punctata | Dotted Blazing Star, Dotted Gayfeather, Narrow-leaved Blazing Star |
| Liatris pycnostachya | Prairie Blazing Star, Cat-tail Gayfeather, Thick-spike Gayfeather, Tall Blazing Star |
| Lilium lancifolium | Tiger Lily |
| Lilium michiganense | Michigan Lily |
| Lilium philadelphicum | Wood Lily, Western Orange-cup Lily, Western Red Lily |
| Limosella aquatica | Mudwort, Awl-leaf Mudwort, Water-mudwort |
| Linaria dalmatica | Dalmatian Toadflax |
| Linaria vulgaris | Butter and Eggs, Yellow Toadflax |
| Lindernia dubia | False Pimpernel, Yellow-seeded False Pimpernel |
| Linnaea borealis | Twinflower |
| Linum lewisii | Blue Flax, Lewis Flax |
| Linum perenne | Perennial Flax, Blue Flax, Garden Flax |
| Linum rigidum | Stiffstem Flax, Large-flowered Yellow Flax |
| Linum sulcatum | Grooved Yellow Flax |
| Linum usitatissimum | Common Flax |
| Liparis liliifolia | Lily-leaved Twayblade, Brown Widelip Orchid, Large Twayblade, Purple Twayblade, Mauve Sleekwort |
| Liparis loeselii | Loesel's Twayblade, Yellow Widelip Orchid, Bog Twayblade, Fen Orchid |
| Listera cordata | Heart-leaved Twayblade |
| Lithospermum canescens | Hoary Puccoon |
| Lithospermum caroliniense | Carolina Puccoon, Hairy Puccoon, Carolina Gromwell |
| Lithospermum incisum | Narrow-leaf Puccoon, Narrowleaf Stoneseed, Fringed Puccoon, Yellow Puccoon, Narrow-leaf Gromwell |
| Lithospermum latifolium | American Gromwell, American Stoneseed, Broad-leaved Gromwell |
| Littorella americana | American Shoreweed, American Shore Plantain |
| Lobelia cardinalis | Cardinal Flower |
| Lobelia dortmanna | Water Lobelia |
| Lobelia inflata | Indian Tobacco |
| Lobelia kalmii | Kalm's Lobelia, Brook Lobelia, Ontario Lobelia |
| Lobelia siphilitica | Blue Lobelia, Great Blue Lobelia, Blue Cardinal Flower |
| Lobelia spicata | Pale-spike Lobelia |
| Lolium multiflorum | Annual Ryegrass, Italian Ryegrass |
| Lolium perenne | Perennial Ryegrass, English Ryegrass |
| Lomatium orientale | Northern Idaho Biscuitroot, Oriental Desert Parsley, Salt-and-Pepper |
| Lonicera canadensis | Fly Honeysuckle |
| Lonicera dioica | Wild Honeysuckle, Limber Honeysuckle, Red Honeysuckle, Glaucous Honeysuckle |
| Lonicera hirsuta | Hairy Honeysuckle |
| Lonicera maackii | Amur Honeysuckle, Bush Honeysuckle |
| Lonicera morrowii | Morrow's Honeysuckle |
| Lonicera oblongifolia | Swamp Fly Honeysuckle, Swamp Honeysuckle |
| Lonicera reticulata | Grape Honeysuckle |
| Lonicera tatarica | Tatarian Honeysuckle |
| Lonicera villosa | Mountain Fly Honeysuckle, Mountain Honeysuckle |
| Lonicera X bella | Showy Honeysuckle, Showy Fly Honeysuckle, Bell's Honeysuckle |
| Lotus corniculatus | Birds-foot Trefoil, Birdfoot Deervetch |
| Ludwigia palustris | Water Purslane, Water Primrose, Marsh Purslane, Marsh Seedbox |
| Ludwigia polycarpa | False Loosestrife, Many-fruit Primrose |
| Lupinus perennis | Wild Lupine, Sundial Lupine |
| Lupinus polyphyllus | Large-leaved Lupine, Western Lupine, Big-leaf Lupine, Garden Lupine |
| Luzula acuminata | Hairy Woodrush, Pointed Woodrush, Clustered Woodrush |
| Luzula luzuloides | Oak Forest Woodrush, Lamarck's Woodrush |
| Luzula multiflora | Common Woodrush, Many-flowered Woodrush, Heath Woodrush |
| Luzula parviflora | Small-flowered Woodrush |
| Lycopodiella inundata | Northern Bog Clubmoss, Marsh Clubmoss, Inundated Clubmoss |
| Lycopodium clavatum | Running Clubmoss, Running Ground-pine |
| Lycopodium lagopus | One-cone Clubmoss, One-cone Ground-pine |
| Lycopus americanus | American Water Horehound, American Bugleweed, Cut-leaved Bugleweed |
| Lycopus asper | Rough Bugleweed |
| Lycopus uniflorus | Northern Bugleweed |
| Lycopus virginicus | Virginia Bugleweed |
| Lygodesmia juncea | Skeletonweed, Rush Skeleton-plant |
| Lysimachia borealis | Starflower |
| Lysimachia ciliata | Fringed Loosestrife |
| Lysimachia hybrida | Lowland Yellow Loosestrife, Hybrid Loosestrife, Lance-leaved Loosestrife |
| Lysimachia minima | Chaffweed |
| Lysimachia nummularia | Creeping Jenny, Moneywort |
| Lysimachia quadriflora | Prairie Loosestrife, Four-flower Yellow Loosestrife, Linear-leaf Loosestrife |
| Lysimachia quadrifolia | Whorled Loosestrife |
| Lysimachia terrestris | Swamp Candles, Swamp Loosestrife, Earth Loosestrife |
| Lysimachia thyrsiflora | Tufted Loosestrife, Water Loosestrife |
| Lysimachia vulgaris | Garden Loosestrife |
| Lythrum alatum | Winged Loosestrife, Wing-angled Loosestrife, Winged Lythrum |
| Lythrum salicaria | Purple Loosestrife |
| Maianthemum canadense | Canada Mayflower, Wild Lily-of-the-valley, False Lily-of-the-valley |
| Maianthemum racemosum | False Solomon's Seal, Solomon's Plume, Feathery False Lily-of-the-Valley |
| Maianthemum stellatum | Starry False Solomon's Seal, Starry Solomon's Plume, Starry False Lily-of-the-Valley |
| Maianthemum trifolium | Three-leaf False Solomon's-seal, Three-leaf Solomon's-plume, Three-leaf False Lily of the Valley |
| Malaxis monophyllos | White Adder's-mouth |
| Malaxis unifolia | Green Adder's-mouth |
| Malus ioensis | Prairie Crabapple, Iowa Crab Apple, Wild Crabapple |
| Malva neglecta | Common Mallow, Cheeses, Cheeseweed |
| Malva pusilla | Round-leaved Mallow, Low Mallow, Dwarf Mallow |
| Marsilea vestita | Hairy Water Clover, Hairy Pepperwort |
| Matricaria chamomilla | German Chamomile, Wild Chamomile, Scented Mayweed |
| Matricaria discoidea | Pineapple-weed, Disc Mayweed |
| Matteuccia struthiopteris | Ostrich Fern |
| Medicago lupulina | Black Medick, Black Medic |
| Medicago sativa | Alfalfa, Purple Medick |
| Melampyrum lineare | Cow Wheat, Narrow-leaf Cow-wheat, American Cow Wheat |
| Melica nitens | Three-flowered Melic |
| Melilotus albus | White Sweet Clover, Honey Clover |
| Melilotus officinalis | Yellow Sweet Clover |
| Menispermum canadense | Canada Moonseed |
| Mentha arvensis | Wild Mint, Field Mint |
| Mentha spicata | Spearmint |
| Menyanthes trifoliata | Buckbean, Bog Bean, Marsh Trefoil, Water Shamrock |
| Mertensia paniculata | Northern Bluebells, Tall Lungwort, Tall Bluebells, Panicled Bluebells |
| Mertensia virginica | Virginia Bluebells, Virginia Cowslip, Virginia Lungwort |
| Micranthes pensylvanica | Swamp Saxifrage, Eastern Swamp Saxifrage |
| Micranthes virginiensis | Early Saxifrage, Virginia Saxifrage |
| Milium effusum | Wood Millet, Woodland Millet Grass, American Millet Grass, Tall Millet |
| Mimulus glabratus | Round-leaf Monkey Flower |
| Mimulus ringens | Allegheny Monkey Flower, Blue Monkey-flower |
| Minuartia dawsonensis | Rock Sandwort, Rock Stitchwort |
| Mirabilis albida | Hairy Four O'clock |
| Mirabilis nyctaginea | Wild Four O'Clock, Heart-leaved Four O'Clock |
| Miscanthus sacchariflorus | Creeping Miscanthus, Amur Silvergrass, Silver Banner-grass |
| Mitchella repens | Partridgeberry, Two-eyed Berry, Twin Berry |
| Mitella diphylla | Two-leaf Miterwort, Bishop's Cap |
| Mitella nuda | Naked Miterwort, Small Bishop's Cap |
| Moehringia lateriflora | Bluntleaf Sandwort, Grove Sandwort |
| Moehringia macrophylla | Large-leaved Sandwort |
| Mollugo verticillata | Carpetweed, Indian Chickweed, Devil's Grip |
| Monarda fistulosa | Wild Bergamot, Horsemint, Bee Balm, Mint-leaf Bee-balm |
| Monarda punctata | Spotted Horsemint, Spotted Beebalm |
| Moneses uniflora | One-flowered Pyrola, One-flowered Wintergreen, Single Delight |
| Monolepis nuttalliana | Nuttall's Povertyweed |
| Monotropa uniflora | Indian Pipe |
| Montia chamissoi | Water Minerslettuce, Toad Lily, Chamisso's Candy-Flower, Water Montia |
| Morus alba | White Mulberry |
| Morus rubra | Red Mulberry |
| Muhlenbergia asperifolia | Scratchgrass, Alkali Muhly |
| Muhlenbergia cuspidata | Plains Muhly |
| Muhlenbergia frondosa | Wirestem Muhly, Swamp Muhly |
| Muhlenbergia glomerata | Spike Muhly, Marsh Muhly, Clustered Muhly Grass, Marsh Wild Timothy |
| Muhlenbergia mexicana | Mexican Muhly, Satin Grass |
| Muhlenbergia racemosa | Marsh Muhly, Green Muhly, Upland Wild Timothy |
| Muhlenbergia richardsonis | Mat Muhly |
| Muhlenbergia schreberi | Nimblewill, Dropseed Muhly |
| Muhlenbergia uniflora | Bog Muhly, One-flowered Muhly |
| Mulgedium pulchellum | Showy Blue Lettuce, Common Blue Lettuce, Beautiful Blue Lettuce, Russian Blue Lettuce |
| Myosotis arvensis | Field Forget-me-not |
| Myosotis laxa | Smaller Forget-me-not, Tufted Forget-me-not |
| Myosotis scorpioides | True Forget-me-not, Water Forget-me-not, Water Scorpion Grass |
| Myosotis sylvatica | Wood Forget-me-not, Garden Forget-me-not |
| Myosotis verna | Spring Forget-me-not, Virginia Forget-me-not, Spring Scorpion Grass |
| Myosoton aquaticum | Giant Chickweed |
| Myosurus minimus | Mousetail, Tiny Mousetail |
| Myrica gale | Sweet-gale, Bog Myrtle |
| Myriophyllum alterniflorum | Alternate-flowered Water-milfoil |
| Myriophyllum farwellii | Farwell's Water-milfoil |
| Myriophyllum sibiricum | Northern Water-milfoil, Common Water-milfoil, Shortspike Watermilfoil |
| Myriophyllum spicatum | Eurasian Water-milfoil, Spiked Water-milfoil |
| Myriophyllum tenellum | Slender Water-milfoil, Dwarf Water-milfoil |
| Myriophyllum verticillatum | Whorled Water-milfoil |
| Myriopteris gracilis | Slender Lip Fern, Fee's Lipfern |
| Nabalus albus | White Rattlesnake-root, White Lettuce, Lion's-foot |
| Nabalus asper | Rough Rattlesnake-root, Hairy Rattlesnake-root, Rough White Lettuce |
| Nabalus racemosus | Purple Rattlesnake-root, Glaucus Rattlesnake-root, Smooth Rattlesnake-root, Prairie Rattlesnake-root, Glaucous White Lettuce |
| Najas flexilis | Nodding Waternymph, Slender Naiad, Flexuous Naiad, Northern Waternymph |
| Najas gracillima | Slender Waternymph, Slender Naiad, Thread-leaf Naiad |
| Najas guadalupensis | Southern Waternymph, Southern Naiad, Common Waternymph, Guadalupe Waternymph, Guppy Grass |
| Najas marina | Spiny Naiad, Spiny Water Nymph, Holly-leaved Naiad, Sea Naiad, Marine Naiad |
| Napaea dioica | Glade Mallow |
| Nassella viridula | Green Needle Grass |
| Nasturtium officinale | Watercress, Small-leaved Water-cress |
| Nelumbo lutea | American Lotus, Wab-bis-sa-pin, Tewape, Water-Chinquapin, Sacred Bean |
| Neottia auriculata | Auricled Twayblade |
| Nepeta cataria | Catnip, Cat mint |
| Nothocalais cuspidata | Prairie False Dandelion, Sharp-point Prairie Dandelion, Wavy-leaf Agoseris |
| Nuphar variegata | Yellow Pond-lily, Bullhead Lily, Variegated Yellow Pond-lily |
| Nuphar X rubrodisca | Intermediate Pond-lily, Red-disk Pond-lily, Yellow Pond-lily |
| Nuttallanthus canadensis | Old-field Toadflax, Blue Toadflax, Canada Toadflax |
| Nymphaea leibergii | Small White Water-lily, Pygmy Waterlily, Leiberg's Water-lily |
| Nymphaea odorata | American White Water-lily, Fragrant White Water-lily |
| Odontites vernus | Red Bartsia, Red Rattle, Late-flowering Eyebright |
| Oenanthe javanica | Water Celery, Java Water Dropwort, Vietnamese Water Celery, Japanese Parsley |
| Oenothera biennis | Common Evening Primrose |
| Oenothera clelandii | Cleland's Evening Primrose, Sand Evening Primrose |
| Oenothera gaura | Biennial Gaura, Biennial Beeblossom, Butterfly Weed |
| Oenothera laciniata | Cut-leaved Evening Primrose, Ragged Evening Primrose |
| Oenothera nuttallii | Nuttall's Evening Primrose, White-stemmed Evening Primrose |
| Oenothera oakesiana | Oakes' Evening Primrose |
| Oenothera parviflora | Northern Evening Primrose, Small-flowered Evening Primrose |
| Oenothera perennis | Small Sundrops, Little Evening-primrose, Perennial Evening-primrose |
| Oenothera rhombipetala | Fourpoint Evening Primrose, Rhombic Evening Primrose |
| Oenothera serrulata | Yellow Sundrops, Toothed Evening Primrose, Plains Yellow Primrose |
| Oenothera suffrutescens | Scarlet Gaura, Scarlet Beeblossom |
| Oenothera villosa | Hairy Evening Primrose |
| Onoclea sensibilis | Sensitive Fern |
| Onopordum acanthium | Scotch Thistle, Scotch Cotton-thistle |
| Onosmodium bejariense | False Gromwell, Soft-hair Marbleseed, Western Marbleseed |
| Ophioglossum pusillum | Northern Adder's-tongue |
| Opuntia fragilis | Brittle Prickly Pear, Fragile Prickly Pear, Little Prickly Pear |
| Opuntia macrorhiza | Plains Prickly Pear, Twist-spine Pricklypear |
| Orobanche fasciculata | Clustered Broomrape |
| Orobanche ludoviciana | Louisiana Broomrape, Prairie Broom-rape |
| Orobanche uniflora | One-flowered Broomrape, Naked Broomrape, One-flowered Cancer-root |
| Orthilia secunda | One-sided Pyrola, One-sided Shinleaf, One-sided Wintergreen, Sidebells Wintergreen |
| Orthocarpus luteus | Yellow Owl-clover |
| Oryzopsis asperifolia | Rough-leaved Rice Grass, Mountain Ricegrass |
| Osmorhiza claytonii | Sweet Cicely, Clayton's Sweetroot |
| Osmorhiza longistylis | Aniseroot, Long-style Sweetroot, Smoother Sweet Cicely |
| Osmunda regalis | Royal Fern |
| Osmundastrum cinnamomeum | Cinnamon Fern |
| Ostrya virginiana | Ironwood, American Hop-hornbeam, Eastern Hop-hornbeam |
| Oxalis dillenii | Southern Wood Sorrel, Slender Yellow Wood Sorrel |
| Oxalis montana | Common Wood Sorrel, Mountain Woodsorrel |
| Oxalis stricta | Yellow Wood Sorrel, Common Yellow Oxalis |
| Oxalis violacea | Violet Wood Sorrel |
| Oxypolis rigidior | Cowbane, Common Water Dropwort |
| Oxytropis borealis var. viscida | Sticky Locoweed, Boreal Locoweed |
| Oxytropis lambertii | Lambert's Locoweed, Purple Locoweed |
| Packera aurea | Golden Ragwort, Heart-leaved Groundsel |
| Packera cana | Woolly Groundsel, Gray Ragwort, Silvery Ragwort |
| Packera indecora | Elegant Groundsel, Rayless Mountain Ragwort |
| Packera paupercula | Balsam Ragwort, Balsam Grounsel |
| Packera plattensis | Prairie Ragwort, Prairie Groundsel |
| Packera pseudaurea | Western Heart-leaved Groundsel, False Gold Groundsel |
| Panax quinquefolius | American Ginseng, Wild Ginseng |
| Panax trifolius | Dwarf Ginseng |
| Panicum capillare | Witchgrass |
| Panicum dichotomiflorum | Fall Panic Grass, Smooth Witchgrass |
| Panicum virgatum | Switchgrass, Tall Panicgrass |
| Parietaria pensylvanica | Pennsylvania Pellitory |
| Parnassia glauca | American Grass of Parnassus, Fen Grass of Parnassus, Grass of Parnassus |
| Parnassia palustris | Marsh Grass of Parnassus |
| Paronychia canadensis | Smooth Forked Nailwort, Canada Forked Chickweed, Tall Forked Chickweed, Smooth Forked Whitlow-wort |
| Parthenium integrifolium | Wild Quinine, American Feverfew |
| Parthenocissus inserta | Woodbine, Grape-woodbine, Thicket Creeper, Virginia Creeper |
| Parthenocissus quinquefolia | Virginia Creeper, Woodbine |
| Paspalum setaceum | Hairy Beadgrass, Hairy Lens Grass, Thin Paspalum, Slender Paspalum |
| Pastinaca sativa | Wild Parsnip |
| Patis racemosa | Black-fruited Rice Grass, Black-seeded Mountain Rice Grass |
| Pedicularis canadensis | Wood Betony, Canadian Lousewort, Common Lousewort |
| Pedicularis lanceolata | Swamp Lousewort, Swamp Betony |
| Pediomelum argophyllum | Silverleaf Scurfpea, Silverleaf Indian Breadroot |
| Pediomelum esculentum | Prairie Turnip, Large Indian Breadroot, Indian Turnip |
| Pellaea atropurpurea | Purple Cliff Brake |
| Pellaea glabella | Smooth Cliff Brake |
| Penstemon albidus | White Beardtongue, White Penstemon |
| Penstemon digitalis | Foxglove Beardtongue, Eastern Smooth Beardtongue |
| Penstemon gracilis | Slender Beardtongue, Lilac Penstemon, Slender Penstemon |
| Penstemon grandiflorus | Large Beardtongue, Large-flowered Beardtongue, Large-flowered Penstemon |
| Penstemon pallidus | Pale Beardtongue, Eastern White Beardtongue |
| Penthorum sedoides | Ditch Stonecrop |
| Peritoma serrulata | Rocky Mountain Beeplant, Spider-flower, Pink Cleome, Stinking Clover, Stinkweed |
| Persicaria amphibia | Swamp Smartweed, Water Smartweed, Longroot Smartweed, Water Knotweed |
| Persicaria arifolia | Halberd-leaved Tearthumb |
| Persicaria careyi | Carey's Smartweed, Carey's Heart's-ease |
| Persicaria hydropiper | Marsh Waterpepper |
| Persicaria hydropiperoides | Mild Waterpepper, Swamp Smartweed |
| Persicaria lapathifolia | Nodding Smartweed, Pale Smartweed, Curlytop Knotweed |
| Persicaria longiseta | Oriental Lady's-thumb, Bristly Lady's-thumb, Bristly Knotweed, Low Smartweed, Creeping Smartweed |
| Persicaria maculosa | Lady's-thumb, Spotted Lady's-thumb, Redshank |
| Persicaria minor | Pygmy Smartweed, Small Water-pepper |
| Persicaria orientalis | Prince's Feather, Kiss-me-over-the-garden-gate |
| Persicaria pensylvanica | Pennsylvania Smartweed |
| Persicaria punctata | Dotted Smartweed, Water Smartweed |
| Persicaria sagittata | Arrow-leaved Tearthumb |
| Persicaria virginiana | Jumpseed |
| Petasites frigidus | Sweet Coltsfoot, Artic Sweet Coltsfoot, Arctic Butterbur, Palmate Sweet Coltsfoot, Arrow-leaved Sweet Coltsfoot, Grape-leaved Sweet Coltsfoot |
| Phacelia franklinii | Franklin's Phacelia, Franklin's Scorpionweed |
| Phalaris arundinacea | Reed Canary Grass, Reed Canarygrass |
| Phalaris canariensis | Common Canary Grass, Annual Canarygrass, Birdseed Grass |
| Phegopteris connectilis | Long Beech Fern, Narrow Beech Fern, Northern Beech Fern |
| Phegopteris hexagonoptera | Broad Beech Fern |
| Phellodendron amurense | Amur Corktree |
| Phemeranthus parviflorus | Small-flowered Fameflower, Sunbright, Prairie Flameflower |
| Phemeranthus rugospermus | Rough-seeded Fameflower, Sand Fameflower, Prairie Fameflower |
| Phleum pratense | Timothy |
| Phlox divaricata | Wild Blue Phlox, Woodland Phlox, Blue Wood Phlox |
| Phlox maculata | Wild Sweet William, Spotted Phlox, Meadow Phlox, Speckled Phlox |
| Phlox paniculata | Garden Phlox, Fall Phlox, Summer Phlox |
| Phlox pilosa | Prairie Phlox, Downy Phlox |
| Phlox subulata | Creeping Phlox, Ground Pink, Moss Pink, Moss Phlox |
| Phragmites australis subsp. americanus | American Common Reed |
| Phragmites australis subsp. australis | European Common Reed |
| Phryma leptostachya | American Lopseed |
| Phyla lanceolata | Lance-leaf Fog Fruit, Northern Fog Fruit |
| Physalis heterophylla | Clammy Ground Cherry |
| Physalis longifolia | Long-leaf Ground Cherry |
| Physalis virginiana | Virginia Ground Cherry |
| Physaria ludoviciana | Bladderpod, Lousiana Bladder-pod |
| Physocarpus opulifolius | Ninebark, Atlantic Ninebark, Common Ninebark |
| Physostegia virginiana | Obedient Plant, False Dragonhead |
| Picea abies | Norway Spruce |
| Picea glauca | White Spruce |
| Picea mariana | Black Spruce |
| Picea pungens | Colorado Spruce, Colorado Blue Spruce |
| Pilea fontana | Black-fruited Clearweed, Lesser Clearweed, Bog Clearweed |
| Pilea pumila | Dwarf Clearweed, Canadian Clearweed |
| Pimpinella saxifraga | Burnet Saxifrage, Solid-stem Burnet Saxifrage |
| Pinguicula vulgaris | Butterwort |
| Pinus banksiana | Jack Pine |
| Pinus nigra | Austrian Pine, European Black Pine |
| Pinus ponderosa | Ponderosa Pine |
| Pinus resinosa | Red Pine, Norway Pine |
| Pinus strobus | White Pine |
| Pinus sylvestris | Scots Pine, Scotch Pine |
| Piptatherum canadense | Canadian Rice Grass |
| Piptatherum pungens | Mountain Rice Grass |
| Plagiobothrys scouleri | Sleeping Popcornflower, Scouler's Popcornflower, Meadow Popcornflower, Matted Popcornflower |
| Plantago aristata | Large-bracted Plantain |
| Plantago elongata | Slender Plantain, Prairie Plantain |
| Plantago eriopoda | Alkali Plantain, Red-wool Plantain, Woolly-crowned Plantain |
| Plantago lanceolata | English Plantain, Narrow-leaf Plantain, Buckhorn Plantain |
| Plantago major | Common Plantain, Broad-leaf Plantain |
| Plantago patagonica | Woolly Plantain, Pursh's Plantain |
| Plantago rugelii | Rugel's Plantain, Black-seed Plantain |
| Plantago virginica | Dwarf Plantain, Pale-seed Plantain, Virginia Plantain, Hoary Plantain |
| Platanthera aquilonis | Northern Green Orchid, Northern Bog Orchid |
| Platanthera clavellata | Small Green Wood Orchid, Green Woodland Orchid, Club-spur Orchid |
| Platanthera dilatata | Tall White Bog Orchid, Scentbottle, Leafy White Orchis |
| Platanthera flava var. herbiola | Tubercled Rein Orchid, Pale Green Orchid, Pale Green Orchis |
| Platanthera hookeri | Hooker's Orchid |
| Platanthera huronensis | Tall Northern Bog Orchid |
| Platanthera lacera | Ragged Fringed Orchid, Green Fringed Orchid, Ragged Orchis |
| Platanthera obtusata | Blunt-leaved Orchid, Small Northern Bog Orchid |
| Platanthera orbiculata | Large Round-leaved Orchid, Lesser Round-leaved Orchid |
| Platanthera praeclara | Western Prairie Fringed Orchid, Great Plains White Fringed Orchid |
| Platanthera psycodes | Lesser Purple Fringed Orchid, Small Purple Fringed Orchis |
| Poa alsodes | Grove Bluegrass, Wood Bluegrass, Grove Meadow Grass |
| Poa annua | Annual Bluegrass |
| Poa arida | Plains Bluegrass |
| Poa bulbosa | Bulbous Bluegrass, Bulbous Meadowgrass |
| Poa chaixii | Broad-leaf Bluegrass, Broad-leaved Meadow Grass |
| Poa compressa | Canada Bluegrass, Flat-stem Bluegrass |
| Poa glauca | Glaucous Bluegrass, Pale Bluegrass |
| Poa nemoralis | Wood Bluegrass, Wood Meadowgrass, Sylvan Bluegrass |
| Poa paludigena | Bog Bluegrass |
| Poa palustris | Fowl Bluegrass, Swamp Meadow-grass |
| Poa pratensis | Kentucky Bluegrass |
| Poa saltuensis | Old-pasture Bluegrass, Weak Bluegrass, Drooping Bluegrass, Woodland Bluegrass, Weak Speargrass |
| Podophyllum peltatum | Mayapple, Wild Mandrake, Ground Lemon |
| Pogonia ophioglossoides | Rose Pogonia, Snake-mouth Orchid, Adder's-mouth Pogonia |
| Polanisia dodecandra | Red-whisker Clammyweed |
| Polanisia jamesii | James' Polanisia, James' Cristatella |
| Polemonium lacustre | Great Lakes Jacob's Ladder |
| Polemonium reptans | Spreading Jacob's Ladder, Greek Valerian, Creeping Polemonium |
| Polygala cruciata | Cross-leaved Milkwort, Drumheads, Marsh Milkwort |
| Polygala polygama | Racemed Milkwort, Purple Milkwort, Bitter Milkwort |
| Polygala sanguinea | Blood Milkwort, Purple Milkwort, Field Milkwort |
| Polygala senega | Seneca Snakeroot, Mountain Flax, Rattlesnake Snakeroot |
| Polygala verticillata | Whorled Milkwort |
| Polygaloides paucifolia | Gaywings, Fringed Milkwort, Fringed Polygala, Flowering Wintergreen |
| Polygonatum biflorum | Smooth Solomon's Seal, Giant Solomon's Seal |
| Polygonatum pubescens | Hairy Solomon's Seal, Downy Solomon's Seal |
| Polygonella articulata | Coast Jointweed, Sand Jointweed, Northern Jointweed |
| Polygonum achoreum | Leathery Knotweed, Blake's Knotweed, Striate Knotweed, Blue Knotweed |
| Polygonum douglasii | Douglas' Knotweed |
| Polygonum tenue | Slender Knotweed, Pleat-leaf Knotweed |
| Polymnia canadensis | Leafcup, White-flower Leaf-cup |
| Polypodium virginianum | Common Polypody, Rock Polypody |
| Polystichum acrostichoides | Christmas Fern |
| Polystichum braunii | Braun's Holly Fern, Prickly Shield Fern |
| Polytaenia nuttallii | Prairie Parsley, Nuttall's Prairie Parsley |
| Pontederia cordata | Pickerelweed |
| Populus alba | White Poplar |
| Populus balsamifera | Balsam Poplar |
| Populus deltoides | Plains Cottonwood, Eastern Cottonwood |
| Populus grandidentata | Big-tooth Aspen, Large-tooth Aspen |
| Populus tremuloides | Quaking Aspen, Trembling Aspen |
| Portulaca oleracea | Common Purslane, Little Hogweed |
| Potamogeton alpinus | Alpine Pondweed, Northern Pondweed, Reddish Pondweed |
| Potamogeton amplifolius | Large-leaved Pondweed, Broad-leaf Pondweed |
| Potamogeton crispus | Curly Pondweed, Curled Pondweed |
| Potamogeton epihydrus | Ribbon-leaf Pondweed, American Pondweed |
| Potamogeton foliosus | Leafy Pondweed |
| Potamogeton gramineus | Grass-leaved Pondweed, Variableleaf Pondweed |
| Potamogeton illinoensis | Illinois Pondweed |
| Potamogeton natans | Floating Pondweed, Floating-leaf Pondweed, Broad-leaf Pondweed |
| Potamogeton nodosus | Long-leaved Pondweed, American Pondweed, Knotty Pondweed |
| Potamogeton oakesianus | Oakes' Pondweed |
| Potamogeton obtusifolius | Blunt-leaved Pondweed |
| Potamogeton praelongus | White-stem Pondweed, Long-stalked Pondweed |
| Potamogeton richardsonii | Richardson's Pondweed |
| Potamogeton robbinsii | Robbin's Pondweed |
| Potamogeton spirillus | Spiral Pondweed, Coiled Pondweed, Northern Snail-seed Pondweed |
| Potamogeton strictifolius | Straight-leaved Pondweed, Stiff Pondweed, Narrow-leaf Pondweed |
| Potamogeton vaseyi | Vasey's Pondweed |
| Potamogeton zosteriformis | Flat-stem Pondweed |
| Potentilla anserina | Silverweed Cinquefoil, Silver-weed |
| Potentilla argentea | Silver Cinquefoil, Silvery Cinquefoil |
| Potentilla hippiana | Woolly Cinquefoil, Horse Cinquefoil |
| Potentilla indica | Mock Strawberry, False Strawberry, Indian Strawberry |
| Potentilla lasiodonta | Sandhills Cinquefoil |
| Potentilla norvegica | Rough Cinquefoil, Norwegian Cinquefoil |
| Potentilla pensylvanica | Pennsylvania Cinquefoil, Prairie Cinquefoil |
| Potentilla recta | Sulphur Cinquefoil, Rough-fruited Cinquefoil |
| Potentilla rivalis | Brook Cinquefoil |
| Potentilla simplex | Common Cinquefoil |
| Potentilla supina | Bushy Cinquefoil, Sand Cinquefoil |
| Primula mistassinica | Mistassini Primrose, Bird's-eye Primrose, Dwarf Canadian Primrose |
| Prosartes trachycarpa | Rough-fruited Fairybells, Rough-fruited Mandarin |
| Prunella vulgaris | Self-heal, Heal-all |
| Prunus americana | Wild Plum, American Red Plum |
| Prunus nigra | Canada Plum |
| Prunus pensylvanica | Pin Cherry, Fire Cherry |
| Prunus pumila | Sand Cherry |
| Prunus serotina | Black Cherry |
| Prunus virginiana | Chokecherry |
| Pseudognaphalium obtusifolium | Sweet Everlasting, Cat-foot, Rabbit-tobacco, Fragrant Cudweed |
| Psoralidium tenuiflorum | Slenderleaf Scurfpea, Wild Alfalfa, Scurfy Pea |
| Pteridium aquilinum | Bracken, Western Bracken Fern |
| Puccinellia distans | Weeping Alkaligrass, European Alkali Grass, Spreading Alkali Grass |
| Puccinellia nuttalliana | Nuttall's Alkaligrass |
| Pycnanthemum virginianum | Virginia Mountain Mint |
| Pyrola americana | Round-leaved Pyrola, American Wintergreen |
| Pyrola asarifolia | Pink Pyrola, Bog Wintergreen |
| Pyrola chlorantha | Green-flowered Pyrola |
| Pyrola elliptica | Shinleaf, Waxflower Shinleaf, Wild Lily-of-the-valley |
| Pyrola minor | Small Shinleaf, Lesser Wintergreen |
| Quercus alba | White Oak |
| Quercus bicolor | Swamp White Oak |
| Quercus ellipsoidalis | Northern Pin Oak |
| Quercus macrocarpa | Bur Oak |
| Quercus rubra | Northern Red Oak |
| Quercus velutina | Black Oak |
| Ranunculus abortivus | Little-leaf Buttercup, Kidney-leaf Buttercup, Small-flower Crowfoot |
| Ranunculus acris | Tall Buttercup, Common Buttercup, Crowfoot |
| Ranunculus aquatilis | White Water Crowfoot, Long-beak Buttercup |
| Ranunculus cymbalaria | Alkali Buttercup, Seaside Crowfoot |
| Ranunculus fascicularis | Early Buttercup, Tufted Buttercup |
| Ranunculus flabellaris | Yellow Water Buttercup, Large Yellow Water Crowfoot |
| Ranunculus flammula | Lesser Spearwort, Creeping Spearwort, Creeping Buttercup |
| Ranunculus gmelinii | Small Yellow Water Crowfoot, Gmelin's Buttercup |
| Ranunculus hispidus | Hispid Buttercup, Bristly Buttercup, Swamp Buttercup, Marsh Buttercup |
| Ranunculus lapponicus | Lapland Buttercup |
| Ranunculus macounii | Macoun's Buttercup |
| Ranunculus pensylvanicus | Pennsylvania Buttercup, Bristly Buttercup, Bristly Crowfoot |
| Ranunculus recurvatus | Hooked Buttercup, Blisterwort, Hooked Crowfoot |
| Ranunculus rhomboideus | Prairie Buttercup, Labrador Buttercup |
| Ranunculus sceleratus | Cursed Crowfoot, Celery-leaf Buttercup, Cursed Buttercup |
| Ranunculus testiculatus | Bur Buttercup, Curveseed Butterwort, Hornseed Buttercup |
| Raphanus raphanistrum | Jointed Charlock, Wild Radish |
| Ratibida columnifera | Prairie Coneflower, Upright Prairie Coneflower, Long-headed Coneflower, Mexican Hat |
| Ratibida pinnata | Gray-headed Coneflower, Pinnate Prairie Coneflower, Yellow Coneflower |
| Reynoutria japonica | Japanese Knotweed, Mexican Bamboo, Hancock's Curse |
| Reynoutria X bohemica | Bohemian Knotweed |
| Rhamnus alnifolia | Alder-leaved Buckthorn, Dwarf Alder, American Alder Buckthorn |
| Rhamnus cathartica | Common Buckthorn |
| Rhodiola integrifolia subsp. leedyi | Leedy's Roseroot |
| Rhododendron groenlandicum | Labrador Tea |
| Rhus aromatica | Fragrant Sumac, Skunkbush |
| Rhus glabra | Smooth Sumac |
| Rhus typhina | Staghorn Sumac |
| Rhynchospora alba | White Beakrush, White Beaksedge |
| Rhynchospora capillacea | Needle Beaksedge, Hair-like Beakrush, Horned Beakrush |
| Rhynchospora capitellata | Brownish Beaksedge, Brownish Beakrush |
| Rhynchospora fusca | Brown Beaksedge, Brown Beakrush, Sooty-colored Beakrush |
| Ribes americanum | Wild Black Currant, American Black Currant, Eastern Black Currant |
| Ribes aureum | Golden Currant, Buffalo Currant, Flowering Currant |
| Ribes cynosbati | Prickly Gooseberry, Dogberry |
| Ribes glandulosum | Skunk Currant |
| Ribes hirtellum | Swamp Gooseberry, Hairy-stemmed Gooseberry |
| Ribes hudsonianum | Northern Black Currant, Hudson Bay Currant, Western Black Currant, Stinking Currant |
| Ribes lacustre | Swamp Black Currant, Bristly Swamp Currant, Bristly Black Currant, Prickly Currant, Black Swamp Gooseberry |
| Ribes missouriense | Missouri Gooseberry |
| Ribes oxyacanthoides | Northern Gooseberry, Canada Gooseberry |
| Ribes rubrum | Garden Red Currant, Red Currant, Cultivated Currant |
| Ribes triste | Swamp Red Currant |
| Robinia hispida | Bristly Locust, Prickly Locust, Rose Acacia |
| Robinia pseudoacacia | Black Locust |
| Rorippa palustris | Bog Yellow-cress, Marsh Yellow Cress |
| Rorippa sessiliflora | Stalkless Yellow-cress, Sessile-flowered Yellowcress |
| Rorippa sylvestris | Creeping Yellow-cress |
| Rosa acicularis | Prickly Wild Rose, Prickly Rose |
| Rosa arkansana | Prairie Rose, Wild Rose |
| Rosa blanda | Smooth Wild Rose, Smooth Rose, Meadow Rose |
| Rosa multiflora | Multiflora Rose |
| Rosa rugosa | Rugosa Rose, Beach Rose, Japanese Rose |
| Rosa woodsii | Wood's Wild Rose, Wood's Rose |
| Rotala ramosior | Toothcup, Lowland Rotala |
| Rubus ablatus | Plains Blackberry, Mountain Blackberry |
| Rubus acridens | Sharp-tooth Blackberry |
| Rubus allegheniensis | Allegheny Blackberry, Common Blackberry |
| Rubus alumnus | Old Field Blackberry |
| Rubus arcticus | Arctic Raspberry, Arctic Bramble, Nagoonbery, Northern Blackberry |
| Rubus caesius | European Dewberry |
| Rubus canadensis | Smooth Blackberry, Canadian Blackberry, Smooth Highbush Blackberry |
| Rubus chamaemorus | Cloudberry, Baked-apple Berry |
| Rubus ferrofluvius | Iron River Dewberry |
| Rubus idaeus | Wild Red Raspberry, American Red Raspberry, Common Red Raspberry |
| Rubus ithacanus | Ithaca Blackberry, Ithaca Dewberry |
| Rubus multifer | Kinnickinnick Dewberry |
| Rubus occidentalis | Black Raspberry |
| Rubus parviflorus | Thimbleberry |
| Rubus parvifolius | Small-leaf Bramble, Japanese Raspberry, Japanese Bramble, Australian Raspberry, Australian Bramble |
| Rubus pubescens | Dwarf Raspberry, Dwarf Red Blackberry |
| Rubus rosa | Rose Blackberry |
| Rubus satis | Downy Racemose Dewberry |
| Rubus stipulatus | Big Horseshoe Lake Bristleberry |
| Rubus uniformis | Uniform Bristleberry, Thornless Dewberry |
| Rudbeckia hirta | Black-eyed Susan |
| Rudbeckia laciniata | Cut-leaf Coneflower, Green-headed Coneflower, Tall Coneflower, Golden Glow |
| Rudbeckia subtomentosa | Sweet Coneflower, Sweet Black-eyed Susan |
| Rudbeckia triloba | Brown-eyed Susan, Three-lobed Coneflower |
| Ruellia humilis | Wild Petunia, Fringe-leaf Ruellia, Prairie Petunia, Hairy Wild Petunia |
| Rumex acetosa | Green Sorrel, Common Sorrel, Garden Sorrel, Common Sheep Dock |
| Rumex acetosella | Common Sheep Sorrel, Red Sorrel |
| Rumex altissimus | Pale Dock, Tall Dock |
| Rumex britannica | Great Water Dock |
| Rumex crispus | Curly Dock, Curled Dock, Yellow Dock |
| Rumex fueginus | Golden Dock, Seaside Dock, Tierra del Fuego Dock |
| Rumex longifolius | Dooryard Dock, Northern Dock, Domestic Dock |
| Rumex obtusifolius | Bitter Dock, Broad-leaved Dock |
| Rumex patientia | Patience Dock |
| Rumex pseudonatronatus | Field Dock |
| Rumex stenophyllus | Narrowleaf Dock |
| Rumex triangulivalvis | Mexican Dock, White Dock, White Willow Dock, Triangular-valved Dock |
| Rumex verticillatus | Swamp Dock, Whorled Water Dock |
| Sagina nodosa | Knotty Pearlwort, Knotted Pearlwort |
| Sagina procumbens | Bird's-eye Pearlwort, Procumbent Pearlwort |
| Sagittaria brevirostra | Short-beaked Arrowhead, Midwestern Arrowhead |
| Sagittaria cristata | Crested Arrowhead |
| Sagittaria cuneata | Arum-leaved Arrowhead, Northern Arrowhead |
| Sagittaria latifolia | Broad-leaf Arrowhead, Common Arrowhead, Duck Potato |
| Sagittaria montevidensis subsp. calycina | Hooded Arrowhead, Long-lobe Arrowhead, Mississippi Arrowhead |
| Sagittaria rigida | Sessile-fruited Arrowhead |
| Salicornia rubra | Red Saltwort, Red Glasswort, Western Glasswort, Red Swampfire, Red Samphire |
| Salix amygdaloides | Peach-leaved Willow |
| Salix bebbiana | Bebb's Willow, Beaked Willow |
| Salix candida | Sage-leaved Willow, Hoary Willow |
| Salix discolor | Pussy Willow |
| Salix eriocephala | Missouri River Willow, Heart-leaved Willow |
| Salix humilis | Prairie Willow, Upland Willow |
| Salix interior | Sandbar Willow |
| Salix lucida | Shining Willow |
| Salix maccalliana | Maccalla's Willow, Hoary-fruited Willow |
| Salix nigra | Black Willow |
| Salix pedicellaris | Bog Willow |
| Salix pellita | Satiny Willow |
| Salix petiolaris | Meadow Willow, Slender Willow, Slender-leaved Willow, Black-bud Willow |
| Salix planifolia | Diamond-leaf Willow, Tea-leaf Willow, Plane-leaf Willow |
| Salix pseudomonticola | False Mountain Willow |
| Salix pyrifolia | Balsam Willow |
| Salix serissima | Autumn Willow |
| Salix X fragilis | Crack Willow, White Crack Willow |
| Salsola collina | Slender Russian Thistle |
| Salsola tragus | Russian Thistle |
| Salvia reflexa | Lance-leaved Sage, Rocky Mountain Sage, Mintweed |
| Sambucus canadensis | Common Elderberry, Common Black Elder, Canadian Black Elderberry, American Elderberry |
| Sambucus racemosa | Red-berried Elder, Red Elderberry |
| Sanguinaria canadensis | Bloodroot |
| Sanicula canadensis | Canadian Black Snakeroot, Canada Sanicle, Short-style Sanicle |
| Sanicula marilandica | Maryland Black Snakeroot, Maryland Sanicle |
| Sanicula odorata | Clustered Black Snakeroot, Gregarious Black Snakeroot, Fragrant Sanicle, Common Black Snakeroot |
| Sanicula trifoliata | Beaked Snakeroot, Large-fruited Black Snakeroot, Large-fruited Sanicle |
| Saponaria officinalis | Bouncing Bet, Soapwort |
| Sarracenia purpurea | Purple Pitcher Plant, Northern Pitcher Plant |
| Saxifraga paniculata | Encrusted Saxifrage, White Mountain Saxifrage |
| Scheuchzeria palustris | Rannoch-rush, Pod Grass, Scheuchzeria |
| Schizachne purpurascens | False Melic Grass, Purple Oat Grass |
| Schizachyrium scoparium | Little Bluestem |
| Schoenoplectiella purshiana | Weakstalk Bulrush, Weak-stalk Club-rush, Pursh's Tufted Bulrush |
| Schoenoplectiella smithii | Smith's Bulrush, Blunt-scale Bulrush |
| Schoenoplectus acutus | Hard-stem Bulrush, Hard-stem Club-rush |
| Schoenoplectus heterochaetus | Slender Bulrush, Pale Great Club-rush |
| Schoenoplectus pungens | Three-square Bulrush, Common Three-square |
| Schoenoplectus subterminalis | Swaying Bulrush, Water Bulrush, Water Clubrush |
| Schoenoplectus tabernaemontani | Soft-stem Bulrush, Soft-stem Club-rush |
| Schoenoplectus torreyi | Torrey's Bulrush |
| Scilla siberica | Siberian Squill |
| Scirpus atrocinctus | Black-girdled Woolgrass, Black-girdled Woolsedge, Black-girdled Bulrush |
| Scirpus atrovirens | Dark Green Bulrush |
| Scirpus cyperinus | Woolgrass, Common Woolsedge |
| Scirpus georgianus | Georgia Bulrush |
| Scirpus hattorianus | Mosquito Bulrush, Smooth Bulsedge |
| Scirpus microcarpus | Small-fruited Bulrush, Panicled Bulrush, Barber-pole Bulrush, Small-fruited Bulsedge |
| Scirpus pallidus | Pale Bulrush, Pale Bulsedge |
| Scirpus pedicellatus | Stalked Bulrush, Stalked Woolsedge |
| Scirpus pendulus | Rufous Bulrush, Nodding Bulrush, Red Bulrush |
| Scleranthus annuus | Knawel, German Knotgrass, Annual Knawel |
| Scleranthus perennis | Perennial Knawel |
| Scleria triglomerata | Whip Nutrush, Tall Nutrush, Whip Nutsedge, Stone Rush, Whip-grass |
| Scleria verticillata | Whorled Nutrush, Low Nutrush, Low Nutsedge |
| Scorzoneroides autumnalis | Autumn Hawkbit, Fall Dandelion |
| Scrophularia lanceolata | Lance-leaf Figwort, Early Figwort, Hare Figwort |
| Scrophularia marilandica | Maryland Figwort, Late Figwort, Carpenter's Square, Eastern Figwort |
| Scutellaria galericulata | Marsh Skullcap, Common Skullcap |
| Scutellaria lateriflora | Mad-dog Skullcap, Blue Skullcap |
| Scutellaria leonardii | Leonard's Skullcap, Small Skullcap |
| Scutellaria ovata | Heart-leaved Skullcap, Ovate-leaved Skullcap |
| Securigera varia | Crown Vetch, Purple Crownvetch |
| Selaginella rupestris | Rock Spikemoss, Northern Selaginella, Ledge Spikemoss |
| Senecio integerrimus | Lambstongue Ragwort, Entire Ragwort, Western Groundsel |
| Senecio viscosus | Sticky Ragwort, Sticky Groundsel |
| Senecio vulgaris | Common Groundsel |
| Setaria faberi | Giant Foxtail, Chinese Foxtail, Japanese Bristlegrass |
| Setaria pumila | Yellow Foxtail, Yellow Bristlegrass |
| Setaria verticillata | Bristly Foxtail, Hooked Foxtail, Hooked Bristlegrass |
| Setaria viridis | Green Foxtail, Green Bristlegrass |
| Shepherdia argentea | Silver Buffaloberry |
| Shepherdia canadensis | Canada Buffaloberry, Russet Buffaloberry, Soapberry |
| Shinnersoseris rostrata | Annual Skeletonweed |
| Sibbaldiopsis tridentata | Three-toothed Cinquefoil, Wineleaf Potentilla |
| Sicyos angulatus | Bur Cucumber, Oneseed Burr Cucumber |
| Silene antirrhina | Sleepy Catchfly |
| Silene csereii | Balkan Catchfly |
| Silene drummondii | Drummond's Campion |
| Silene hitchguirei | Mountain Campion |
| Silene latifolia | White Campion, Bladder Campion, White Cockle |
| Silene nivea | Snowy Campion |
| Silene noctiflora | Night-flowering Catchfly, Night-flowering Campion |
| Silene stellata | Starry Campion, Widowsfrill |
| Silene vulgaris | Bladder Campion |
| Silphium integrifolium | Rosinweed, Whole-leaf Rosinweed, Prairie Rosinweed |
| Silphium laciniatum | Compass Plant |
| Silphium perfoliatum | Cup Plant |
| Silphium terebinthinaceum | Prairie Dock |
| Sinapis arvensis | Charlock, Wild Mustard, Field Mustard |
| Sisymbrium altissimum | Tall Tumble Mustard, Jim Hill Mustard |
| Sisymbrium loeselii | Tall Hedge Mustard, Small Tumbleweed Mustard |
| Sisymbrium officinale | Hedge Mustard |
| Sisyrinchium campestre | Prairie Blue-eyed Grass, White-eyed Grass |
| Sisyrinchium montanum | Mountain Blue-eyed Grass |
| Sisyrinchium mucronatum | Needle-pointed Blue-eyed Grass |
| Sium suave | Water Parsnip, Hemlock Water Parsnip |
| Smilax ecirrhata | Upright Carrion Flower, Erect Carrion Flower |
| Smilax illinoensis | Illinois Carrion Flower, Illinois Greenbrier |
| Smilax lasioneura | Blue Ridge Carrion Flower, Common Carrion Flower |
| Smilax tamnoides | Bristly Greenbrier, Chinaroot |
| Solanum carolinense | Horse Nettle |
| Solanum dulcamara | Bittersweet Nightshade, Climbing Nightshade, Deadly Nightshade, Woody Nightshade |
| Solanum physalifolium | Hairy Nightshade, Hoe Nightshade, Argentine Nightshade, Ground Cherry Nightshade |
| Solanum ptychanthum | Black Nightshade, Eastern Black Nightshade, West Indian Nightshade |
| Solanum rostratum | Buffalo Bur Nightshade, Kansas Thistle |
| Solidago altissima | Tall Goldenrod, Late Goldenrod |
| Solidago canadensis | Canada Goldenrod, Tall Goldenrod |
| Solidago flexicaulis | Zigzag Goldenrod, Broad-leaved Goldenrod |
| Solidago gigantea | Giant Goldenrod, Late Goldenrod |
| Solidago hispida | Hairy Goldenrod |
| Solidago juncea | Early Goldenrod |
| Solidago missouriensis | Missouri Goldenrod |
| Solidago mollis | Velvety Goldenrod, Soft Goldenrod, Ashy Goldenrod |
| Solidago nemoralis | Gray Goldenrod, Field Goldenrod, Old-field Goldenrod |
| Solidago ptarmicoides | Upland White Goldenrod, Prairie Goldenrod, Sneezewort Aster |
| Solidago riddellii | Riddell's Goldenrod |
| Solidago rigida | Stiff Goldenrod |
| Solidago sciaphila | Cliff Goldenrod, Driftless Goldenrod, Shadowy Goldenrod |
| Solidago speciosa | Showy Goldenrod |
| Solidago uliginosa | Bog Goldenrod |
| Solidago ulmifolia | Elm-leaved Goldenrod |
| Sonchus arvensis | Perennial Sowthistle, Field Sowthistle |
| Sonchus asper | Spiny Sowthistle, Prickly Sowthistle |
| Sonchus oleraceus | Common Sowthistle, Annual Sowthistle |
| Sorbus americana | American Mountain-ash |
| Sorbus aucuparia | European Mountain-ash, Rowan |
| Sorbus decora | Showy Mountain-ash, Northern Mountain-ash |
| Sorghastrum nutans | Indian Grass, Yellow Indian Grass |
| Sparganium americanum | American Bur-reed, Lesser Bur-reed, Nuttall's Bur-reed |
| Sparganium androcladum | Branched Bur-reed, Branching Bur-reed |
| Sparganium angustifolium | Narrow-leaf Bur-reed, Floating Bur-reed |
| Sparganium emersum | Unbranched Bur-reed, European Bur-reed |
| Sparganium eurycarpum | Giant Bur-reed, Broad-fruit Bur-reed |
| Sparganium fluctuans | Floating Bur-reed |
| Sparganium glomeratum | Clustered Bur-reed, Northern Bur-reed |
| Sparganium natans | Small Bur-reed, Arctic Bur-reed |
| Spartina pectinata | Prairie Cordgrass, Sloughgrass, Freshwater Cordgrass |
| Spergularia rubra | Red Sand Spurrey |
| Sphaeralcea coccinea | Scarlet Globe-mallow, Cowboy's Delight, Red False Mallow |
| Sphenopholis intermedia | Slender Wedgegrass, Slender Wedgescale |
| Sphenopholis obtusata | Prairie Wedgegrass, Prairie Wedgescale |
| Spinulum annotinum | Stiff Clubmoss, Bristly Clubmoss, Common Interrupted Clubmoss |
| Spinulum canadense | Northern Clubmoss, Northern Bristly Clubmoss, Northern Interrupted Clubmoss |
| Spiraea alba | White Meadowsweet |
| Spiraea tomentosa | Steeplebush, Hardhack |
| Spiranthes casei | Case's Ladies'-tresses |
| Spiranthes cernua | Nodding Ladies'-tresses |
| Spiranthes lacera var. gracilis | Southern Slender Ladies'-tresses |
| Spiranthes lacera var. lacera | Northern Slender Ladies'-tresses |
| Spiranthes magnicamporum | Great Plains Ladies'-tresses, Late-flowering Ladies-tresses |
| Spiranthes romanzoffiana | Hooded Ladies'-tresses |
| Spirodela polyrrhiza | Greater Duckweed, Great Duckmeal, Common Duckmeat |
| Sporobolus compositus | Rough Dropseed, Tall Dropseed, Composite Dropseed |
| Sporobolus cryptandrus | Sand Dropseed |
| Sporobolus heterolepis | Prairie Dropseed |
| Sporobolus neglectus | Small Dropseed, Annual Dropseed, Puffsheath Dropseed |
| Sporobolus vaginiflorus | Poverty Dropseed, Sheathed Dropseed |
| Stachys hispida | Hairy Hedge Nettle, Rough Hedge Nettle |
| Stachys palustris | Marsh Hedge Nettle, Woundwort |
| Staphylea trifolia | Bladdernut, American Bladdernut |
| Stellaria graminea | Lesser Stitchwort, Grass-leaved Stitchwort, Grass-leaved Chickweed |
| Stellaria longifolia | Long-leaf Starwort, Long-leaved Stitchwort |
| Stellaria longipes | Long-stalk Starwort, Goldie's Starwort |
| Stellaria media | Common Chickweed |
| Streptopus amplexifolius | Clasping-leaved Twisted-stalk, Watermelon Berry, White Mandarin, Wild Cucumber |
| Streptopus lanceolatus | Rose Twisted-stalk, Rose Mandarin, Rosybells, Sessile-leaf Twisted-stalk |
| Strophostyles helvola | Wild Bean, Trailing Fuzzybean, Trailing Wild Bean, Amberique-bean |
| Strophostyles leiosperma | Trailing Pea, Slick-seed Fuzzybean, Small Fuzzy-bean, Smooth-seed Wild Bean |
| Stuckenia pectinata | Sago Pondweed, Fennel-leaf Pondweed |
| Suaeda calceoliformis | Seablite, American Seablite, Pursh's Seepweed, Horned Seepweed |
| Sullivantia sullivantii | Sullivant's Coolwort, Reniform Sullivantia |
| Symphoricarpos albus | Snowberry, Common Snowberry, White Snowberry |
| Symphoricarpos occidentalis | Wolfberry, Western Snowberry |
| Symphyotrichum boreale | Northern Bog Aster, Rush Aster |
| Symphyotrichum ciliatum | Rayless Aster, Rayless Alkali Aster, Short-rayed Aster |
| Symphyotrichum ciliolatum | Lindley's Aster, Ciliolate Aster, Northern Heart-leaved Aster |
| Symphyotrichum cordifolium | Blue Wood Aster, Heart-leaved Aster, Heart-leaved American Aster, Broad-leaved Aster, Lowrie's Blue Wood Aster |
| Symphyotrichum drummondii | Drummond's Aster |
| Symphyotrichum ericoides | Heath Aster, White Heath Aster |
| Symphyotrichum firmum | Shining Aster, Glossy-leaf Aster |
| Symphyotrichum laeve | Smooth Blue Aster |
| Symphyotrichum lanceolatum | Panicled Aster, Eastern Panicled Aster, White Panicled Aster, Lance-leaved Aster |
| Symphyotrichum lateriflorum | Calico Aster, Side-flowering Aster |
| Symphyotrichum novae-angliae | New England Aster |
| Symphyotrichum oblongifolium | Aromatic Aster, Fall Aster |
| Symphyotrichum ontarionis | Ontario Aster, Bottomland Aster |
| Symphyotrichum oolentangiense | Sky-blue Aster, Azure Aster |
| Symphyotrichum pilosum | Awl Aster, Frost Aster, Hairy White Oldfield Aster |
| Symphyotrichum prenanthoides | Crooked Aster, Crooked-stem Aster, Zig-zag Aster |
| Symphyotrichum puniceum | Purple-stemmed Aster, Red-stem Aster, Swamp Aster |
| Symphyotrichum sericeum | Silky Aster, Western Silver Aster |
| Symphyotrichum shortii | Short's Aster |
| Symphyotrichum urophyllum | Arrowleaf Aster, White Arrow-leaved Aster, Tail-leaved Aster |
| Symphytum officinale | Common Comfrey, Knitbone |
| Symplocarpus foetidus | Skunk Cabbage |
| Taenidia integerrima | Yellow Pimpernel |
| Tamarix ramosissima | Saltcedar, Tamarisk, Five-stamen Tamarisk |
| Tanacetum parthenium | Feverfew |
| Tanacetum vulgare | Common Tansy, Golden-buttons |
| Taraxacum erythrospermum | Red-seeded Dandelion |
| Taraxacum officinale | Common Dandelion |
| Taxus canadensis | Canada Yew, American Yew, Ground Hemlock |
| Tephroseris palustris | Marsh Ragwort, Marsh Fleabane, Swamp Ragwort, Swamp Groundsel |
| Tephrosia virginiana | Goat's-rue, Virginia Tephrosia, Catgut, Hoary-pea, Rabbit-pea |
| Teucrium canadense | Germander, Canada Germander, American Germander, Wood Sage |
| Thalictrum dasycarpum | Tall Meadow Rue, Purple Meadow Rue |
| Thalictrum dioicum | Early Meadow Rue, Quicksilver-weed |
| Thalictrum thalictroides | Rue Anemone, Meadowrue |
| Thalictrum venulosum | Veiny Meadow Rue, Northern Meadow-rue |
| Thaspium barbinode | Hairy-jointed Meadow Parsnip |
| Thelypteris palustris | Northern Marsh Fern, Eastern Marsh Fern |
| Thinopyrum intermedium | Intermediate Wheatgrass |
| Thladiantha dubia | Red Hailstone, Golden Creeper, Manchu Tubergourd |
| Thlaspi arvense | Field Pennycress |
| Thuja occidentalis | White Cedar, Arborvitae, Swamp Cedar, Northern White Cedar, Eastern White Cedar |
| Tilia americana | American Basswood, American Linden, Basswood |
| Tilia cordata | Little-leaf Linden, Small-leaved Lime |
| Tofieldia pusilla | Small False Asphodel, Scottish Asphodel, Scotch False Asphodel, Scotch Featherling |
| Torilis japonica | Japanese Hedge Parsley, Erect Hedge Parsley |
| Toxicodendron radicans | Eastern Poison Ivy, Common Poison Ivy |
| Toxicodendron rydbergii | Western Poison Ivy |
| Toxicodendron vernix | Poison Sumac |
| Tradescantia bracteata | Long-bracted Spiderwort, Bracted Spiderwort |
| Tradescantia occidentalis | Spiderwort, Prairie Spiderwort, Western Spiderwort |
| Tradescantia ohiensis | Ohio Spiderwort, Bluejacket |
| Tragopogon dubius | Yellow Goat's Beard, Yellow Salsify, Fistulous Goat's-beard |
| Tragopogon pratensis | Meadow Goat's Beard, Showy Goat's-beard, Meadow Salsify, Jack-go-to-bed-at-noon |
| Triadenum fraseri | Fraser's Marsh St. Johnswort, Bog St. John's-wort |
| Triantha glutinosa | Sticky False Asphodel, Sticky Tofieldia |
| Trichophorum alpinum | Alpine Bulrush, Hudson Bay Bulrush, Alpine Club-sedge, Alpine Leafless-Bulrush |
| Trichophorum cespitosum | Tufted Bulrush, Tufted Club-sedge, Tufted Club-rush, Tufted Leafless-Bulrush, Deergrass |
| Trichophorum clintonii | Clinton's Bulrush, Clinton's Club-sedge, Clinton's Leafless-Bulrush |
| Trichostema brachiatum | False Pennyroyal, Fluxweed |
| Tridens flavus | Purpletop, Grease Grass, Tall Redtop |
| Trifolium arvense | Rabbit-foot Clover, Hare's-foot Clover |
| Trifolium aureum | Golden Clover, Palmate Hop Clover, Yellow Hop Clover |
| Trifolium campestre | Low Hop Clover, Field Clover, Plains Clover |
| Trifolium fragiferum | Strawberry Clover |
| Trifolium hybridum | Alsike Clover |
| Trifolium incarnatum | Crimson Clover |
| Trifolium pratense | Red Clover |
| Trifolium repens | White Clover, Dutch Clover |
| Triglochin maritima | Seaside Arrowgrass |
| Triglochin palustris | Marsh Arrowgrass |
| Trillium cernuum | Nodding Trillium, Whip-poor-will Flower |
| Trillium flexipes | Drooping Trillium, Nodding Wake-robin, Declined Trillium, Bent Trillium |
| Trillium grandiflorum | Large-flowered Trillium, White Trillium, Snow Trillium, White Wake Robin |
| Trillium nivale | Snow Trillium, Dwarf White Trillium, Dwarf White Wake-robin |
| Triodanis perfoliata | Clasping-leaved Venus' Looking-glass, Clasping Venus' Looking-glass |
| Triosteum aurantiacum | Early Horse Gentian, Orange-fruited Horse Gentian, Scarlet-fruited Horse Gentian |
| Triosteum perfoliatum | Late Horse Gentian, Fever-wort, Wild Coffee |
| Triplasis purpurea | Purple Sandgrass |
| Tripleurospermum inodorum | Scentless False Mayweed, Scentless Chamomile, False Chamomile |
| Trisetum spicatum | Spike Trisetum, Narrow False Oat, Downy Oatgrass |
| Tsuga canadensis | Eastern Hemlock, Canda Hemlock |
| Turritis glabra | Tower Mustard, Tower Rockcress |
| Typha angustifolia | Narrow-leaved Cattail |
| Typha latifolia | Broad-leaf Cat-tail, Common Cattail |
| Typha X glauca | Hybrid Cattail, White Cattail |
| Ulmus americana | American Elm, White Elm |
| Ulmus pumila | Siberian Elm, Chinese Elm |
| Ulmus rubra | Red Elm, Slippery Elm |
| Ulmus thomasii | Rock Elm, Cork Elm |
| Urtica dioica | Stinging Nettle, California Nettle |
| Utricularia cornuta | Horned Bladderwort, Spurred Bladderwort |
| Utricularia geminiscapa | Hidden-fruit Bladderwort, Twin-stemmed Bladderwort, Mixed Bladderwort |
| Utricularia gibba | Humped Bladderwort, Creeping Bladderwort |
| Utricularia intermedia | Flat-leaved Bladderwort |
| Utricularia minor | Lesser Bladderwort |
| Utricularia purpurea | Purple-flowered Bladderwort |
| Utricularia resupinata | Lavender Bladderwort, Resupinate Bladderwort, Northeastern Bladderwort, Inverted Bladderwort |
| Utricularia vulgaris | Common Bladderwort, Greater Bladderwort, Hooded Water-Milfoil |
| Uvularia grandiflora | Large-flowered Bellwort |
| Uvularia sessilifolia | Sessile-leaf Bellwort, Straw Lily, Wild Oats |
| Vaccinium angustifolium | Lowbush Blueberry |
| Vaccinium cespitosum | Dwarf Bilberry, Dwarf Huckleberry |
| Vaccinium macrocarpon | Large Cranberry |
| Vaccinium myrtilloides | Velvet-leaf Blueberry |
| Vaccinium oxycoccos | Small Cranberry, Bog Cranberry |
| Vaccinium uliginosum | Alpine Bilberry |
| Vaccinium vitis-idaea | Lingonberry, Cowberry, Mountain Cranberry |
| Valeriana edulis | Edible Valerian, Tobacco Root |
| Valeriana officinalis | Garden Heliotrope, Garden Valerian, White Valerian |
| Vallisneria americana | American Eelgrass, Water Celery, Wild Celery, Tape-grass |
| Verbascum blattaria | Moth Mullein |
| Verbascum thapsus | Common Mullein, Great Mullein |
| Verbena bracteata | Big-bract Verbena, Prostrate Vervain, Bracted Vervain, Creeping Vervain |
| Verbena hastata | Blue Vervain, Swamp Verbena |
| Verbena simplex | Narrow-leaved Vervain |
| Verbena stricta | Hoary Vervain, Hoary Verbena |
| Verbena urticifolia | White Vervain, Nettle-leaf Vervain |
| Vernonia fasciculata | Prairie Ironweed, Western Ironweed, Smooth Ironweed, Bunched Ironweed |
| Veronica americana | American Speedwell, American Brooklime |
| Veronica arvensis | Corn Speedwell, Wall Speedwell |
| Veronica catenata | Water Speedwell, Pink Water Speedwell |
| Veronica longifolia | Long-leaved Speedwell, Garden Speedwell |
| Veronica officinalis | Common Speedwell, Common Gypsyweed, Health Speedwell |
| Veronica peregrina | Purslane Speedwell, Neckweed |
| Veronica persica | Bird's-eye Speedwell, Persian Speedwell, Common Field Speedwell |
| Veronica scutellata | Marsh Speedwell, Narrow-leaved Speedwell, Skullcap Speedwell |
| Veronica serpyllifolia | Thyme-leaf Speedwell |
| Veronica verna | Spring Speedwell |
| Veronicastrum virginicum | Culver's Root |
| Viburnum edule | Squashberry, Highbush Cranberry, Lowbush Cranberry, Mooseberry |
| Viburnum lentago | Nannyberry, Sheepberry |
| Viburnum opulus var. americanum | American Highbush Cranberry |
| Viburnum opulus var. opulus | Guelder-rose, European Highbush Cranberry, Snowball Bush |
| Viburnum rafinesquianum | Downy Arrow-wood |
| Vicia americana | American Vetch, Purple Vetch |
| Vicia cracca | Tufted Vetch, Bird Vetch, Cow Vetch |
| Vicia sativa | Common Vetch, Spring Vetch, Garden Vetch |
| Vicia villosa | Hairy Vetch, Winter Vetch |
| Vinca minor | Periwinkle, Creeping Myrtle, Running Myrtle, Lesser Periwinkle |
| Viola adunca | Sand Violet, Hooked-spur Violet, Western Dog Violet, Early Blue Violet |
| Viola cucullata | Marsh Blue Violet, Hooded Violet |
| Viola eriocarpa | Smooth Yellow Violet |
| Viola grisea | Great Lakes Violet |
| Viola incognita | Sweet White Violet, Large-leaved White Violet |
| Viola labradorica | Dog Violet, American Dog Violet, Alpine Violet, Labrador Violet |
| Viola lanceolata | Lance-leaved Violet, Bog White Violet, Strap-leaved Violet |
| Viola minuscula | Northern White Violet, Smooth White Violet |
| Viola nephrophylla | Northern Bog Violet |
| Viola nuttallii | Yellow Prairie Violet, Nuttall's Violet |
| Viola pedata | Birdfoot Violet, Beardless Birdfoot Violet |
| Viola pedatifida | Prairie Violet, Bearded Birdfoot Violet |
| Viola primulifolia | Primrose-leaved Violet |
| Viola pubescens | Downy Yellow Violet, Smooth Yellow Violet |
| Viola renifolia | Kidney-leaved Violet |
| Viola rugulosa | Western Canada White Violet, Canada Violet, Rugulose Violet, Rydberg's Violet, Great Plains White Violet |
| Viola sagittata | Arrow-leaved Violet, Arrowhead Violet |
| Viola selkirkii | Great-spurred Violet, Selkirk's Violet |
| Viola sororia | Common Blue Violet, Woolly Blue Violet, Northern Blue Violet |
| Vitis aestivalis | Summer Grape, Silverleaf Grape |
| Vitis riparia | Riverbank Grape, Wild Grape, Frost Grape |
| Vulpia octoflora | Six-weeks Fescue, Eight-week Fescue, Pull-out Grass, Eight-flower Six-weeks Grass |
| Waldsteinia fragarioides | Barren Strawberry |
| Wolffia borealis | Northern Watermeal, Spotted Watermeal |
| Wolffia columbiana | Columbian Watermeal |
| Woodsia alpina | Alpine Woodsia, Northern Cliff Fern |
| Woodsia glabella | Smooth Woodsia, Smooth Cliff Fern |
| Woodsia ilvensis | Rusty Woodsia, Rusty Cliff Fern |
| Woodsia obtusa | Blunt-lobed Woodsia, Blunt-lobe Cliff Fern |
| Woodsia oregana | Oregon Woodsia, Oregon Cliff Fern, Western Cliff Fern, Cathcart's Woodsia |
| Woodsia scopulina | Rocky Mountain Woodsia, Mountain Cliff Fern |
| Xanthisma spinulosum | Cutleaf Ironplant, Lacy Tansyaster, Spiny Goldenaster |
| Xanthium strumarium | Cocklebur |
| Xyris montana | Northern Yellow-eyed Grass, Bog Yellow-eyed Grass, Montane Yellow-eyed Grass |
| Xyris torta | Twisted Yellow-eyed Grass, Slender Yellow-eyed Grass |
| Zannichellia palustris | Horned Pondweed |
| Zanthoxylum americanum | Prickly Ash |
| Zigadenus elegans | Mountain Death Camas, White Camas |
| Zizania palustris | Wild Rice, Northern Wild Rice |
| Zizia aptera | Heart-leaved Alexanders, Meadow Zizia |
| Zizia aurea | Golden Alexanders, Golden Zizia |