| Scientific Name | Family Name | Common Name | Synonyms |
| Abies fraseri | Pinaceae | Fraser fir | |
| Abies grandis | Pinaceae | grand fir | |
| Abies lasiocarpa | Pinaceae | subalpine fir | |
| Abies magnifica | Pinaceae | California red fir | |
| Acacia angustissima | Fabaceae | white ball acacia | prairie acacia |
| Acacia constricta | Fabaceae | whitethorn acacia | mescat acacia |
| Acacia greggii | Fabaceae | catclaw acacia | tearblanket, devil's claw |
| Acacia koa | Fabaceae | koa | |
| Acacia neovernicosa | Fabaceae | viscid acacia | |
| Acer circinatum | Aceraceae | vine maple | |
| Acer glabrum var. douglasii | Aceraceae | Douglas maple | |
| Acer macrophyllum | Aceraceae | bigleaf maple | |
| Acer negundo | Aceraceae | boxelder | |
| Acer nigrum | Aceraceae | black maple | Acer saccharum ssp. nigrum |
| Acer pensylvanicum | Aceraceae | striped maple | moosewood |
| Acer platanoides | Aceraceae | Norway maple | |
| Acer rubrum | Aceraceae | red maple | |
| Acer saccharinum | Aceraceae | silver maple | |
| Acer saccharum | Aceraceae | sugar maple | |
| Acer spicatum | Aceraceae | mountain maple | |
| Achillea millefolium | Asteraceae | common yarrow | |
| Achnatherum occidentale ssp. occidentale | Poaceae | western needlegrass | Stipa occidentalis |
| Actaea pachypoda | Ranunculaceae | white baneberry | doll's eyes, Actaea alba |
| Adiantum pedatum | Pteridaceae | northern maidenhair fern | |
| Aesculus flava | Hippocastanaceae | yellow buckeye | |
| Aesculus glabra | Hippocastanaceae | Ohio buckeye | |
| Aesculus hippocastanum | Hippocastanaceae | horse chestnut | |
| Aesculus parviflora | Hippocastanaceae | bottlebrush buckeye | |
| Aesculus pavia | Hippocastanaceae | red buckeye | |
| Agalinis tenuifolia | Scrophulariaceae | slenderleaf false foxglove | Gerardia tenuifolia |
| Agave ocahui | Agavaceae | century plant | ocahui |
| Agave palmeri | Agavaceae | Palmer's century plant | |
| Agave vilmoriniana | Agavaceae | Octopus agave | |
| Ageratina altissima | Asteraceae | white snakeroot | Eupatorium rugosum |
| Agrimonia pubescens | Rosaceae | downy agrimony | soft agrimony |
| Agrimonia rostellata | Rosaceae | woodland agrimony | beaked agrimony |
| Ailanthus altissima | Simaroubaceae | tree of heaven | stinktree |
| Albizia julibrissin | Mimosaceae | mimosa | silk-tree |
| Alliaria petiolata | Brassicaceae | garlic mustard | |
| Allium canadense | Liliaceae | meadow garlic | Canada garlic, wild garlic |
| Allium cernuum | Liliaceae | nodding wild onion | nodding onion |
| Allium vineale | Liliaceae | wild garlic | field garlic, crow garlic, scallions |
| Alnus rubra | Betulaceae | red alder | |
| Alnus serrulata | Betulaceae | hazel alder | common alder |
| Ambrosia artemisiifolia | Asteraceae | common ragweed | annual ragweed |
| Ambrosia deltoidea | Asteraceae | triangle bursage | triangle burr ragweed, Fraseria deltoidea |
| Ambrosia trifida | Asteraceae | giant ragweed | |
| Amelanchier alnifolia | Rosaceae | Saskatoon serviceberry | |
| Amelanchier arborea | Rosaceae | downy serviceberry | |
| Ampelopsis cordata | Vitaceae | heartleaf ampelopsis | heartleaf peppervine |
| Amphiachyris dracunculoides | Asteraceae | prairie broomweed | |
| Amsonia tabernaemontana | Apocynaceae | blue star | eastern blue star |
| Anaphalis margaritacea | Asteraceae | western pearly everlasting | |
| Anemone canadensis | Ranunculaceae | Canadian anemone | |
| Anemone caroliniana | Ranunculaceae | Carolina anemone | |
| Andropogon gerardii | Poaceae | big bluestem | |
| Angelica triquinata | Apiaceae | mountain angelica | filmy angelica |
| Antennaria plantaginifolia | Asteraceae | plantain-leaf pussy-toes | woman's tobacco |
| Antennaria solitaria | Asteraceae | singlehead pussytoes | solitary pussytoes |
| Anemone virginiana | Ranunculaceae | thimbleweed | tall thimbleweed |
| Apios americana | Fabaceae | groundnut | |
| Apocynum cannabinum | Apocynaceae | Indian hemp | hemp dogbane |
| Aquilegia canadensis | Ranunculaceae | red columbine | |
| Arabis laevigata | Brassicaceae | smooth rock cress | sickle-pod mustard |
| Arabis perstellata | Brassicaceae | Braun's rock cress | |
| Aralia spinosa | Araliaceae | devil's walkingstick | Hercules' club |
| Arbutus arizonica | Ericaceae | Arizona madrone | Arizona madrono |
| Arbutus menziesii | Ericaceae | Pacific madrone | |
| Arctium minus | Asteraceae | lesser burrdock | |
| Arctostaphylos pungens | Ericaceae | pointleaf manzanita | |
| Arctostaphylos sp. | Ericaceae | manzanita | |
| Arenaria capillaris | Caryophyllaceae | slender mountain sandwort | |
| Argemone pleiacantha | Papaveraceae | prickly poppy | southwestern prickly poppy, bluestem pricklepoppy, thistle poppy, chicalote, cowboy's fried egg |
| Arisaema dracontium | Araceae | green dragon | |
| Arisaema triphyllum | Araceae | Jack in the pulpit | |
| Aristida stricta | Poaceae | wiregrass | pineland threeawn |
| Aristolochia macrophylla | Aristolochiaceae | Dutchman's pipe | pipevine |
| Arabis shortii | Brassicaceae | Short's rockcress | |
| Aristolochia tomentosa | Aristolochiaceae | pipe vine | woolly dutchman's pipe |
| Artemisia tridentata | Asteraceae | big sagebrush | |
| Artemisia tripartita | Asteraceae | threetip sagebrush | |
| Aruncus dioicus | Saxifragaceae | goatsbeard | bride's feathers |
| Arundinaria gigantea | Poaceae | giant cane | |
| Asarum canadense | Aristolochiaceae | Canadian wild ginger | |
| Asclepias exaltata | Asclepiadaceae | poke milkweed | |
| Asclepias incarnata | Asclepiadaceae | swamp milkweed | |
| Asimina obovata | Annonaceae | bigflower pawpaw | flag pawpaw |
| Asclepias purpurascens | Asclepiadaceae | purple milkweed | |
| Asclepias quadrifolia | Asclepiadaceae | four leaf milkweed | |
| Asclepias syriaca | Asclepiadaceae | common milkweed | |
| Asclepias tuberosa | Asclepiadaceae | butterflyweed | butterfly milkweed |
| Asclepias variegata | Asclepiadaceae | red ring milkweed | |
| Asclepias verticillata | Asclepiadaceae | whorled milkweed | |
| Asclepias viridiflora | Asclepiadaceae | green comet milkweed | |
| Asclepias viridis | Asclepiadaceae | green antelope horn | |
| Asimina triloba | Anonaceae | pawpaw | |
| Asparagus officinalis | Liliaceae | garden asparagus | |
| Asplenium platyneuron | Aspleniaceae | ebony spleenwort | |
| Asplenium rhizophyllum | Aspleniaceae | walking fern | |
| Astragalus bibullatus | Fabaceae | Pyne's ground plum | limestone glade milkvetch |
| Astragalus tennesseensis | Fabaceae | Tennessee milkvetch | |
| Athyrium filix-femina ssp. asplenioides | Dryopteridaceae | aspelenium ladyfern | |
| Aureolaria flava | Scrophulariaceae | false foxglove | |
| Aureolaria pectinata | Scrophulariaceae | combleaf yellow false foxglove | |
| Aureolaria pedicularia | Scrophulariaceae | fernleaf yellow false foxglove | |
| Baptisia australis | Fabaceae | blue wild indigo | |
| Baccharis sarothroides | Asteraceae | desert broom | broom baccharis, rosin brush, Mexican broom |
| Baptisia tinctoria | Fabaceae | horseflyweed | |
| Barbarea verna | Brassicaceae | early yellowrocket | early wintercress |
| Barbarea vulgaris | Brassicaceae | wintercress | garden yellowrocket |
| Betula alleghaniensis | Betulaceae | yellow birch | |
| Belamcanda chinensis | Iridaceae | blackberry lily | |
| Betula lenta | Betulaceae | sweet birch | black birch |
| Betula nigra | Betulaceae | river birch | |
| Betula occidentalis | Betulaceae | water birch | |
| Betula papyrifera | Betulaceae | paper birch | |
| Bidens aristosa | Asteraceae | midwestern tickseed sunflower | bearded beggarticks |
| Bidens frondosa | Asteraceae | devil's beggartick | |
| Bignonia capreolata | Bignoniaceae | crossvine | |
| Blephilia ciliata | Lamiaceae | downy wood mint | downy pagoda plant |
| Blephilia hirsuta | Lamiaceae | hairy wood mint | hairy pagoda plant |
| Boehmeria cylindrica | Urticaceae | false nettle | small spike false nettle |
| Botrychium dissectum | Ophioglossaceae | cutleaf grapefern | Botrychium dissectum var. obliquum |
| Botrychium jenmanii | Ophioglossaceae | Dixie grapefern | |
| Botrychium lunarioides | Ophioglossaceae | winter grapefern | |
| Botrychium virginianum | Ophioglossaceae | rattlesnake fern | |
| Bouteloua curtipendula | Poaceae | sideoats grama | |
| Brassica rapa | Brassicaceae | turnip mustard | field mustard |
| Brickellia eupatorioides | Asteraceae | false boneset | Kuhnia eupatorioides |
| Bromus inermis | smooth brome | | |
| Broussonetia papyrifera | Moraceae | paper mulberry | |
| Buchloe dactyloides | Poaceae | buffalograss | |
| Buglossoides arvensis | Boraginaceae | corn gromwell | Lithospermum arvense |
| Bupleurum rotundifolium | Apiaceae | hare's ear | throughwax |
| Calocedrus decurrens | Cupressaceae | incense cedar | |
| Calycanthus floridus | Calycanthaceae | eastern sweetshrub | |
| Calystegia sepium | Convolvulaceae | hedge false bindweed | low bindweed, Convolvulus sepium |
| Camassia scilloides | Liliaceae | wild hyacinth | Atlantic camas |
| Campanulastrum americanum | Campanulaceae | American bellflower | Campanula americana |
| Campsis radicans | Bignoniaceae | trumpet creeper | |
| Capsella bursa-pastoris | Brassicaceae | shepherd's purse | |
| Cardamine angustata | Brassicaceae | slender toothwort | Dentaria heterophylla |
| Cardamine bulbosa | Brassicaceae | spring cress | bulbous bittercress, Cardamine rhomboidea |
| Castilleja coccinea | Scrophulariaceae | scarlet Indian paintbrush | |
| Cardamine concatenata | Brassicaceae | cutleaf toothwort | Dentaria laciniata |
| Cardamine diphylla | Brassicaceae | crinkleroot toothwort | two leaved toothwort, broad leaf toothwort, Dentaria diphylla |
| Cardamine douglassii | Brassicaceae | purple cress | limestone bittercress |
| Cardamine hirsuta | Brassicaceae | hairy bittercress | hoary bittercress |
| Carduus nutans | Asteraceae | nodding plumeless thistle | |
| Carex picta | Cyperaceae | Boott's sedge | |
| Carnegiea gigantea | Cactaceae | saguaro | giant saguaro, Cereus giganteus, Carnegia gigantea |
| Carpinus caroliniana | Betulaceae | American hornbeam | muscletree |
| Carya laciniosa | Juglandaceae | shellbark hickory | kingnut hickory |
| Carya ovalis | Juglandaceae | red hickory | |
| Carya alba | Juglandaceae | mockernut hickory | Carya tomentosa |
| Carya carolinae-septentrionalis | Juglandaceae | southern shagbark hickory | |
| Carya cordiformis | Juglandaceae | bitternut hickory | |
| Carya floridana | Juglandaceae | scrub hickory | |
| Carya glabra | Juglandaceae | pignut hickory | |
| Cardiospermum halicacabum | Sapindaceae | balloon vine | |
| Carya illinoinensis | Juglandaceae | pecan | |
| Carya ovata | Juglandaceae | shagbark hickory | |
| Carya pallida | Juglandaceae | sand hickory | |
| Castanea dentata | Fagaceae | American chestnut | |
| Catalpa speciosa | Bignoniaceae | northern catalpa | |
| Caulophyllum thalictroides | Berberidaceae | blue cohosh | |
| Ceanothus americanus | Rhamnaceae | New Jersey tea | |
| Ceanothus velutinus | Rhamnaceae | snowbrush ceanothus | |
| Cedrus deodara | Pinaceae | Deodar cedar | |
| Celtis laevigata | Ulmaceae | sugarberry | southern hackberry |
| Celtis occidentalis | Ulmaceae | northern hackberry | common hackberry |
| Celtis pallida | Ulmaceae | desert hackberry | |
| Centaurea cyanus | Asteraceae | bachelor's button | garden cornflower |
| Centrosema virginianum | Fabaceae | spurred butterfly pea | |
| Cephalanthus occidentalis | Rubiaceae | common buttonbush | |
| Cerastium fontanum ssp. vulgare | Caryophyllaceae | mouse eared chickweed | Cerastium vulgatum |
| Ceratopteris richardii | Parkeriaceae | triangle waterfern | |
| Cercis canadensis | Fabaceae | eastern redbud | |
| Chamaelirium luteum | Liliaceae | fairywand | |
| Chaerophyllum procumbens | Apiaceae | spreading chervil | |
| Chaerophyllum tainturieri | Apiaceae | southern chervil | hairyfruit chervil |
| Chamaebatiaria millefolium | Rosaceae | fernbush | |
| Chamaecrista fasciculata | Fabaceae | partridge pea | sleepingplant |
| Chamaecyparis nootkatensis | Cupressaceae | Alaska cedar | |
| Chamaesyce nutans | Euphorbiaceae | eyebane | |
| Chamerion angustifolium ssp. angustifolium | Onagraceae | fireweed | |
| Chasmanthium latifolium | Poaceae | river oats | Uniola latifolia, spangle grass, Indian woodoats |
| Cheilanthes lanosa | Pteridaceae | hairy lipfern | |
| Chelone glabra | Scrophulariaceae | white turtlehead | |
| Chilopsis linearis | Bignoniaceae | desert willow | mimbre, jano, desert catalpa, flowering willow |
| Chimaphila maculata | Pyrolaceae | spotted wintergreen | pipsissewa, striped prince's pine |
| Chionanthus virginicus | Oleaceae | white fringetree | grandpa's beard |
| Cichorium intybus | Asteraceae | chicory | |
| Cimicifuga americana | Ranunculaceae | mountain bugbane | |
| Cimicifuga racemosa | Ranunculaceae | black cohosh | black bugbane |
| Circaea lutetiana | Onagraceae | broadleaf enchanter's nightshade | |
| Cirsium altissimum | Asteraceae | tall thistle | |
| Cirsium vulgare | Asteraceae | bull thistle | |
| Cladrastis kentukea | Fabaceae | yellowwood | Cladrastis lutea |
| Claytonia virginica | Portulacaceae | Virginia spring beauty | |
| Clematis versicolor | Ranunculaceae | pale leather flower | |
| Clematis viorna | Ranunculaceae | vasevine | leather flower |
| Clematis virginiana | Ranunculaceae | virgin's bower | devil's darning needles |
| Clinopodium glabellum | Lamiaceae | glade savory | Ozark calamint, Calamintha glabella, Satureja glabella |
| Clintonia borealis | Liliaceae | bluebead lily | bluebead, yellow clintonia |
| Clintonia uniflora | Liliaceae | queen's cup | bride's bonnet |
| Cocculus carolinus | Menispermaceae | Carolina snailseed | Carolina coralbead, red berried moonseed |
| Collinsonia canadensis | Lamiaceae | richweed | |
| Commelina communis | Commelinaceae | Asiatic dayflower | common dayflower |
| Commelina dianthifolia | Commelinaceae | western dayflower | birdbill dayflower |
| Commelina erecta | Commelinaceae | slender dayflower | whitemouth dayflower,erect dayflower |
| Conium maculatum | Apiaceae | poison hemlock | |
| Conocephalum conicum | Conocephalaceae | liverwort | |
| Conoclinium coelestinum | Asteraceae | blue mistflower | Eupatorium coelestinum |
| Conopholis americana | Orobanchaceae | squawroot | American cancer-root |
| Conyza canadensis | Asteraceae | horseweed | Canadian horseweed |
| Coreopsis lanceolata | Asteraceae | lance leaf tickseed | lance leaf coreopsis |
| Coreopsis major | Asteraceae | whorled leaf coreopsis | greater tickseed, forest tickseed |
| Coreopsis tinctoria | Asteraceae | golden tickseed | |
| Cornus alternifolia | Cornaceae | alternateleaf dogwood | |
| Cornus drummondii | Cornaceae | roughleaf dogwood | |
| Cornus florida | Cornaceae | flowering dogwood | |
| Cornus foemina | Cornaceae | stiff dogwood | |
| Cornus nuttallii | Cornaceae | Pacific dogwood | |
| Cornus obliqua | Cornaceae | silky dogwood | |
| Cornus racemosa | Cornaceae | gray dogwood | |
| Cornus sericea ssp. sericea | Cornaceae | red osier dogwood | |
| Coronilla varia | Fabaceae | purple crownvetch | |
| Corydalis flavula | Fumariaceae | yellow fumewort | |
| Corylus americana | Betulaceae | American hazelnut | |
| Cotinus obovatus | Anacardiaceae | American smoketree | |
| Comandra umbellata | Santalaceae | bastard toadflax | |
| Collinsia verna | Scrophulariaceae | spring blue eyed Mary | |
| Corallorhiza wisteriana | Orchidaceae | spring coralroot | |
| Crataegus harbisonii | Rosaceae | Harbison's hawthorn | |
| Crataegus mollis | Rosaceae | downy hawthorn | |
| Crataegus phaenopyrum | Rosaceae | Washington hawthorn | Washington-thorn |
| Crataegus collina | Rosaceae | dotted hawthorn | Crataegus punctata |
| Crepis pulchra | Asteraceae | smallflower hawksbeard | |
| Croton capitatus | Euphorbiaceae | hogwort | |
| Croton monanthogynus | Euphorbiaceae | lemon spurge | prairie tea |
| Cruciata pedemontana | Rubiaceae | piedmont bedstraw | Galium pedemontanum |
| Cryptotaenia canadensis | Apiaceae | Canadian honewort | |
| Cuscuta sp. | Cuscutaceae | dodder | |
| Cuphea viscosissima | Lythraceae | blue waxweed | |
| Cypripedium acaule | Orchidaceae | pink lady's slipper | moccasin flower |
| Cynoglossum virginianum | Boraginaceae | wild comfrey | |
| Cyperus echinatus | Cyperaceae | globe flatsedge | |
| Cypripedium reginae | Orchidaceae | showy lady's slipper | |
| Cypripedium pubescens | Orchidaceae | greater yellow lady's slipper | Cypripedium calceolus var. pubescens, Cypripedium parviflorum var. pubescens |
| Cystopteris protrusa | Dryopteridaceae | lowland bladderfern | |
| Dactylis glomerata | Poaceae | orchard grass | |
| Dalea candida | Fabaceae | white prairie clover | |
| Dalea foliosa | Fabaceae | leafy prairie clover | |
| Dalea gattingeri | Fabaceae | purpletassels | |
| Dalea purpurea | Fabaceae | purple prairie clover | |
| Dasistoma macrophylla | Scrophulariaceae | mullein foxglove | |
| Dasylirion wheeleri | Liliaceae | sotol | common sotol, spoonplant, desert spoon, cactus spoon |
| Datura stramonium | Solanaceae | jimsonweed | |
| Daucus carota | Apiaceae | Queen Anne's lace | |
| Delphinium carolinianum ssp. calciphilum | Ranunculaceae | prairie larkspur | Delphinium virescens |
| Delphinium tricorne | Ranunculaceae | dwarf larkspur | |
| Desmanthus illinoensis | Fabaceae | prairie mimosa | prairie bundleflower |
| Desmodium nudiflorum | Fabaceae | naked flowered ticktrefoil | |
| Desmodium pauciflorum | Fabaceae | fewflower ticktrefoil | |
| Desmodium perplexum | Fabaceae | perplexed ticktrefoil | |
| Deutzia scabra | Hydrangeaceae | fuzzy pride-of-Rochester | |
| Dianthus armeria | Caryophyllaceae | Deptford pink | |
| Dicentra cucullaria | Fumariaceae | dutchman's breeches | |
| Dicentra eximia | Fumariaceae | bleeding heart | turkey corn |
| Dichanthelium laxiflorum | Poaceae | openflower rosette grass | Panicum xalapense, Panicum laxiflorum |
| Digitalis purpurea | Scrophulariaceae | purple foxglove | |
| Dionaea muscipula | Droseraceae | Venus flytrap | |
| Dioscorea oppositifolia | Dioscoreaceae | cinnamon vine | Chinese yam, Dioscorea batatas |
| Diodia virginiana | Rubiaceae | Virginia buttonweed | |
| Dioscorea villosa | Dioscoreaceae | wild yam | |
| Diospyros virginiana | Ebenaceae | persimmon | |
| Dirca palustris | Thymelaeaceae | eastern leatherwood | |
| Diplazium pycnocarpon | Dryopteridaceae | glade fern | Athyrium pycnocarpon, Asplenium pycnocarpon |
| Dipsacus fullonum | Dipsacaceae | teasel | fuller's teasel |
| Dodecatheon meadia | Primulaceae | shooting star | pride of Ohio |
| Dracopis amplexicaulis | Asteraceae | clasping coneflower | |
| Draba verna | Brassicaceae | spring draba | Whitlow grass |
| Dracunculus vulgaris | Araceae | common dracunculus | |
| Drosera linearis | Droseraceae | slenderleaf sundew | |
| Drosera sp. | Droseraceae | sundew | |
| Duchesnea indica | Rosaceae | Indian strawberry | |
| Echinacea paradoxa | Asteraceae | yellow coneflower | Bush's purple coneflower |
| Echinacea purpurea | Asteraceae | eastern purple coneflower | |
| Echinacea simulata | Asteraceae | prairie purple coneflower | wavyleaf purple coneflower |
| Echinacea tennesseensis | Asteraceae | Tennessee purple coneflower | |
| Echinocereus fendleri ssp. fasciculatus | Cactaceae | pinkflower hedgehog cactus | |
| Echinocereus nicholii | Cactaceae | golden hedgehog cactus | Nichol's hedgehog cactus |
| Echium vulgare | Boraginaceae | common viper's bugloss | |
| Elaeagnus angustifolia | Elaeagnaceae | Russian olive | |
| Elaeagnus umbellata | Elaeagnaceae | autumn olive | |
| Eleocharis compressa | Cyperaceae | flatstem spikerush | |
| Elephantopus carolinianus | Asteraceae | leafy elephant's foot | Carolina elephantsfoot |
| Encelia farinosa | Asteraceae | brittlebush | goldenhills |
| Enemion biternatum | Ranunculaceae | eastern false rue anemone | |
| Ephedra sp. | Ephedraceae | ephedra | Morman tea, jointfir |
| Epifagus virginiana | Orobanchaceae | beechdrops | |
| Equisetum arvense | Equisetaceae | field horsetail | |
| Equisetum hyemale ssp. affine | Equisetaceae | scouringrush horsetail | |
| Ericameria nauseosa ssp. nauseosa | Asteraceae | rubber rabbitbrush | |
| Erigenia bulbosa | Apiaceae | harbinger of spring | |
| Erigeron annuus | Asteraceae | eastern daisy fleabane | |
| Erysimum capitatum | Brassicaceae | sand dune wallflower | |
| Erigeron philadelphicus | Asteraceae | Philadelphia fleabane | |
| Erigeron pulchellus | Asteraceae | robin's plantain | |
| Erigeron strigosus | Asteraceae | lesser daisy fleabane | prairie fleabane |
| Eryngium yuccifolium | Apiaceae | rattlesnake master | button eryngo |
| Erythrina crista-galli | Fabaceae | crybabytree | |
| Erythronium albidum | Liliaceae | white trout lily | white fawn lily |
| Erythronium americanum | Liliaceae | trout lily | dogtooth violet |
| Eryngium integrifolium | Apiaceae | blueflower eryngo | |
| Eschscholzia californica | Papaveraceae | California poppy | |
| Euonymus alatus | Celastraceae | winged burning bush | |
| Euonymus americanus | Celastraceae | strawberry bush | hearts a-bustin',Euonymus americana |
| Euonymus atropurpureus | Celastraceae | eastern wahoo, Euonymus atropurpurea | |
| Euonymus fortunei | Celastraceae | winter creeper | |
| Eupatorium altissimum | Asteraceae | tall thoroughwort | |
| Eupatorium fistulosum | Asteraceae | hollow joe pye weed | trumpetweed |
| Eupatorium pilosum | Asteraceae | rough boneset | |
| Eupatorium serotinum | Asteraceae | late flowering throughwort | late boneset |
| Euphorbia commutata | Euphorbiaceae | wood spurge | tinted woodland spurge |
| Euphorbia corollata | Euphorbiaceae | flowering spurge | |
| Evolvulus nuttallianus | Convolvulaceae | shaggy dwarf morning-glory | |
| Fagus grandifolia | Fagaceae | American beech | |
| Fagus sylvatica | Fagaceae | European beech | |
| Ferocactus cylindraceus ssp. cylindraceus | Cactaceae | California fire barrel cactus | Ferocactus acanthodes |
| Ferocactus emoryi | Cactaceae | Emory's barrel cactus | Ferocactus covillei, Coville's barrel cactus |
| Ferocactus herrerae | Cactaceae | twisted barrel | |
| Ferocactus wislizeni | Cactaceae | Arizona barrel cactus | candy barrel cactus, fishhook barrel |
| Ficus aurea | Moraceae | Florida strangler fig | |
| Forestiera ligustrina | Oleaceae | upland swamp-privet | shrub swamp-privet |
| Forsythia viridissima | Oleaceae | greenstem forsythia | |
| Fothergilla major | Hamamelidaceae | mountain witch alder | |
| Fouquieria splendens | Fouquieriaceae | ocotillo | candlewood, slimwood, coachwhip, Jacob's staff, vine cactus, flamingsword |
| Fragaria virginiana | Rosaceae | Virginia strawberry | |
| Frangula caroliniana | Rhamnaceae | Carolina buckthorn | Rhamnus caroliniana |
| Frasera caroliniensis | Gentianaceae | American columbo | Swertia caroliniensis |
| Fraxinus americana | Oleaceae | white ash | |
| Fraxinus pennsylvanica | Oleaceae | green ash | |
| Fraxinus quadrangulata | Oleaceae | blue ash | |
| Gaillardia pulchella | Asteraceae | firewheel | blanket flower |
| Galearis spectabilis | Orchidaceae | showy orchis | |
| Galium aparine | Rubiaceae | cleavers | stickywilly, bedstraw |
| Galium circaezans | Rubiaceae | licorice bedstraw | |
| Gamochaeta purpurea | Asteraceae | spoonleaf purple everlasting | purple cudweed, Gnaphalium purpureum |
| Gaultheria shallon | Ericaceae | salal | |
| Gaura filipes | Onagraceae | slender gaura | slenderstalk beeblossom |
| Geranium carolinianum | Geraniaceae | pink carolina cranes-bill | Carolina geranium |
| Geranium dissectum | Geraniaceae | red cranesbill | cutleaf geranium |
| Geranium maculatum | Geraniaceae | wild geranium | spotted geranium |
| Geranium molle | Geraniaceae | dove's foot cranes-bill | dovefoot geranium |
| Geum canadense | Rosaceae | white avens | |
| Geum vernum | Rosaceae | spring avens | |
| Ginkgo biloba | Ginkgoaceae | maidenhair tree | ginkgo |
| Glandularia canadensis | Verbenaceae | rose vervain | Verbena canadensis, rose mock vervain |
| Glechoma hederacea | Lamiaceae | ground ivy | |
| Gleditsia triacanthos | Fabaceae | honey locust | |
| Goodyera pubescens | Orchidaceae | downy rattlesnake plantain | |
| Grindelia lanceolata | Asteraceae | narrowleaf gumweed | |
| Gratiola quartermaniae | Scrophulariaceae | limestone hedge hyssop | |
| Gymnocladus dioicus | Fabaceae | Kentucky coffeetree | |
| Halesia tetraptera | Styracaceae | mountain silverbell | Halesia carolina |
| Hamamelis vernalis | Hamamelidaceae | Ozark witchhazel | |
| Hamamelis virginiana | Hamamelidaceae | American witchhazel | |
| Hedera helix | Araliaceae | English ivy | |
| Hedyotis nigricans | Rubiaceae | glade bluet | Houstonia nigricans, diamondflowers |
| Helenium amarum | Asteraceae | fine leaved sneezeweed | Helenium tenuifolium, bitterweed, yellowdicks |
| Helenium autumnale | Asteraceae | common sneezeweed | |
| Helenium flexuosum | Asteraceae | purplehead sneezeweed | |
| Helianthus angustifolius | Asteraceae | narrow leaf sunflower | swamp sunflower |
| Helianthus eggertii | Asteraceae | Eggert's sunflower | |
| Helianthus microcephalus | Asteraceae | small headed sunflower | small woodland sunflower |
| Helianthus mollis | Asteraceae | ashy sunflower | |
| Helianthus occidentalis | Asteraceae | western sunflower | |
| Helianthus verticillatus | Asteraceae | whorled sunflower | |
| Hexalectris spicata | Orchidaceae | spiked crested coralroot | |
| Heliotropium tenellum | Boraginaceae | slender heliotrope | pasture heliotrope |
| Hemerocallis fulva | Liliaceae | orange daylily | |
| Hepatica nobilis ssp. acuta | Ranunculaceae | sharplobe hepatica | |
| Heracleum maximum | Apiaceae | common cowparsnip | |
| Hesperis matronalis | Brassicaceae | dame's rocket | |
| Hesperostipa comata ssp. comata | Poaceae | needle and thread | Stipa comata |
| Heuchera americana | Saxifragaceae | common alumroot | American alumroot |
| Heuchera villosa | Saxifragaceae | maple leaf alumroot | hairy alumroot |
| Hibiscus syriacus | Malvaceae | rose of Sharon | |
| Holodiscus discolor | Rosaceae | ocean spray | |
| Houstonia caerulea | Rubiaceae | azure bluet | Quaker ladies |
| Houstonia purpurea ssp. purpurea | Rubiaceae | summer bluet | Venus' pride, Hedyotis purpurea |
| Houstonia pusilla | Rubiaceae | least bluet | Hedyotis crassifolia, tiny bluet, small bluet |
| Houstonia serpyllifolia | Rubiaceae | thymeleaf bluet | Hedyotis michauxii, mountain bluet, creeping bluet |
| Hymenocallis caroliniana | Amaryllidaceae | Carolina spiderlily | |
| Hybanthus concolor | Violaceae | green violet | |
| Hydrangea arborescens | Hydrangeaceae | wild hydrangea | |
| Hydrangea quercifolia | Hydrangeaceae | oakleaf hydrangea | |
| Hydrastis canadensis | Ranunculaceae | golden seal | |
| Hydrophyllum appendiculatum | Hydrophyllaceae | great waterleaf | |
| Hydrophyllum virginianum | Hydrophyllaceae | Shawnee salad | |
| Hypericum frondosum | Clusiaceae | cedarglade St. Johnswort | |
| Hypericum hypericoides ssp. multicaule | Clusiaceae | St. Andrew's cross | Hypericum stragulum |
| Hypericum punctatum | Clusiaceae | spotted St. Johnswort | |
| Hypericum sphaerocarpum | Clusiaceae | roundseed St. Johnswort | |
| Hypoxis hirsuta | Iridaceae | yellow stargrass | common goldstar |
| Idria columnaris | Fouquieriace | boojum | |
| Ilex decidua | Aquifoliaceae | possumhaw | |
| Ilex opaca | Aquifoliaceae | American holly | |
| Ilex verticillata | Aquifoliaceae | common winterberry | |
| Ilex vomitoria | Aquifoliaceae | yaupon | |
| Impatiens capensis | Balsaminaceae | jewelweed | |
| Impatiens pallida | Balsaminaceae | pale touch-me-not | |
| Iodanthus pinnatifidus | Brassicaceae | purple rocket | |
| Ipomoea hederacea | Convolvulaceae | ivyleaf morning glory | ivy-leaved morning glory |
| Ipomoea lacunosa | Convolvulaceae | small white morning glory | white star |
| Ipomoea pandurata | Convolvulaceae | wild potato vine | man of the earth |
| Ipomoea purpurea | Convolvulaceae | tall morning-glory | |
| Iris cristata | Iridaceae | dwarf crested iris | |
| Isothecium myosuroides | Brachytheciaceae | isothecium moss | |
| Itea virginica | Grossulariaceae | Virginia sweetspire | |
| Iva annua | Asteraceae | annual marsh elder | |
| Jasminum nudiflorum | Oleaceae | winter jasmine | |
| Jeffersonia diphylla | Berberidaceae | twinleaf | |
| Juglans cinerea | Juglandaceae | butternut | white walnut |
| Juglans major | Juglandaceae | Arizona walnut | |
| Juglans nigra | Juglandaceae | black walnut | |
| Juniperus communis | Cupressaceae | common juniper | |
| Juniperus deppeana | Cupressaceae | alligator juniper | western juniper, checkered bark juniper |
| Juniperus monosperma | Cupressaceae | oneseed juniper | cherrystone, red berry juniper |
| Juniperus osteosperma | Cupressaceae | Utah juniper | shaggy bark juniper |
| Juniperus virginiana | Cupressaceae | eastern redcedar | |
| Justicia americana | Acanthaceae | American water willow | |
| Kallstroemia grandiflora | Zygophyllaceae | Arizona caltrop | Arizona poppy, orange caltrop, summer poppy |
| Kalmia latifolia | Ericaceae | mountain laurel | |
| Koelreuteria paniculata | Sapindaceae | golden rain tree | |
| Krigia biflora | Asteraceae | two flower dwarf dandelion | orange dwarf dandelion, two flowered cynthia |
| Krigia dandelion | Asteraceae | potato dwarf dandelion | potato dandelion |
| Lachnocaulon sp. | Eriocaulaceae | bogbutton | |
| Lactuca canadensis | Asteraceae | wild lettuce | Canada lettuce |
| Lactuca floridana | Asteraceae | tall blue lettuce | woodland lettuce, Florida blue lettuce |
| Lactuca serriola | Asteraceae | prickly lettuce | |
| Lagerstroemia indica | Lythraceae | crapemyrtle | |
| Lamium amplexicaule | Lamiaceae | henbit deadnettle | |
| Lamium purpureum | Lamiaceae | purple deadnettle | |
| Laportea canadensis | Urticaceae | Canadian woodnettle | |
| Larix occidentalis | Pinaceae | western larch | |
| Larrea tridentata | Zygophyllaceae | creosote bush | hediondilla, little stinker, gobernadora |
| Lathyrus latifolius | Fabaceae | everlasting pea | Lathyrus latifolia, perennial pea |
| Leavenworthia exigua var. exigua | Brassicaceae | Tennessee gladecress | |
| Leavenworthia stylosa | Brassicaceae | long styled glade cress | cedar glade cress, Nashville mustard |
| Lemna sp. | Lemnaceae | duckweed | |
| Lepidium campestre | Brassicaceae | field pepperweed | |
| Lepidium virginicum | Brassicaceae | poor man's pepper | peppergrass, Virginia pepperweed |
| Lespedeza bicolor | Fabaceae | shrubby lespedeza | bicolor lespediza |
| Lespedeza cuneata | Fabaceae | Chinese lespedeza | sericea lespedeza |
| Lesquerella densipila | Brassicaceae | Duck River bladderpod | |
| Lesquerella globosa | Brassicaceae | Short's bladderpod | |
| Lesquerella lescurii | Brassicaceae | Nashville mustard | Lescur's bladderpod |
| Leucospora multifida | Scrophulariaceae | narrowleaf paleseed | |
| Lesquerella perforata | Brassicaceae | Spring Creek bladderpod | |
| Lesquerella stonensis | Brassicaceae | Stone River bladderpod | |
| Leavenworthia uniflora | Brassicaceae | Michaux's gladecress | |
| Leucanthemum vulgare | Asteraceae | oxeye daisy | Chrysanthemum leucanthemum |
| Leucothoe fontanesiana | Ericaceae | dog hobble | highland doghobble |
| Liatris aspera | Asteraceae | rough blazing star | tall blazing star |
| Liparis loeselii | Orchidaceae | fen orchid | yellow widelip orchid |
| Licania michauxii | Chrysobalanaceae | gopher apple | |
| Liatris spicata | Asteraceae | dense blazing star | |
| Liatris squarrosa | Asteraceae | scaly blazing star | |
| Ligustrum vulgare | Oleaceae | European privet | |
| Lilium superbum | Liliaceae | turk's cap lily | |
| Linum sulcatum | Linaceae | grooved flax | |
| Lindera benzoin | Lauraceae | spicebush | |
| Linum usitatissimum | Linaceae | common flax | |
| Liquidambar styraciflua | Hamamelidaceae | sweetgum | |
| Liriodendron tulipifera | Magnoliaceae | tuliptree | tulip poplar |
| Lithocarpus densiflorus | Fagaceae | tanoak | |
| Lithospermum canescens | Boraginaceae | hoary puccoon | |
| Lithospermum tuberosum | Boraginaceae | southern stoneseed | tuberous stoneseed |
| Lobelia appendiculata var. gattingeri | Campanulaceae | Gattinger's lobelia | |
| Lobelia cardinalis | Campanulaceae | cardinal flower | |
| Lobelia inflata | Campanulaceae | Indian tobacco | |
| Lobelia puberula | Campanulaceae | downy lobelia | |
| Lobelia siphilitica | Campanulaceae | great blue lobelia | |
| Lobelia spicata | Campanulaceae | palespike lobelia | |
| Lonicera fragrantissima | Caprifoliaceae | winter honeysuckle | sweet breath of spring |
| Lonicera involucrata | Caprifoliaceae | twinberry | twinberry honeysuckle |
| Lonicera japonica | Caprifoliaceae | Japanese honeysuckle | |
| Lonicera maackii | Caprifoliaceae | Amur honeysuckle | |
| Lonicera morrowii | Caprifoliaceae | Morrow's honeysuckle | |
| Lonicera sempervirens | Caprifoliaceae | coral honeysuckle | trumpet honeysuckle |
| Luzula bulbosa | Juncaceae | bulbous woodrush | |
| Lycopodiella alopecuroides | Lycopodiaceae | foxtail clubmoss | Lycopodium alopecuroides |
| Lycopodium digitatum | Lycopodiaceae | fan clubmoss | |
| Lyonia ferruginea | Ericaceae | rusty staggerbush | |
| Lyonia fruticosa | Ericaceae | coastal plain staggerbush | |
| Lygodium palmatum | Lygodiaceae | American climbing fern | |
| Lysimachia quadrifolia | Primulaceae | whorled yellow loosestrife | |
| Lythrum salicaria | Lythraceae | purple loosestrife | |
| Maclura pomifera | Moraceae | Osage orange | hedge apple |
| Magnolia ×soulangiana | Magnoliaceae | saucer magnolia | Chinese magnolia |
| Magnolia acuminata | Magnoliaceae | cucumber-tree | cucumber magnolia |
| Magnolia fraseri | Magnoliaceae | mountain magnolia | Fraser magnolia |
| Magnolia grandiflora | Magnoliaceae | southern magnolia | |
| Magnolia macrophylla | Magnoliaceae | bigleaf magnolia | |
| Magnolia tripetala | Magnoliaceae | umbrella magnolia | |
| Magnolia virginiana | Magnoliaceae | sweetbay | sweetbay magnolia |
| Mahonia aquifolium | Berberidaceae | mahonia | Oregon grape |
| Mahonia haematocarpa | Berberidaceae | red barberry | Berberis haematocarpa |
| Mahonia nervosa | Berberidaceae | Cascade Oregon grape | Berberis nervosa, Cascade barberry |
| Maianthemum racemosum ssp. racemosum | Liliaceae | false Solomon's seal | Smilacina racemosa, feathery false lily of the valley |
| Malus sylvestris | Rosaceae | apple | European crabapple |
| Manfreda virginica | Agavaceae | false aloe | |
| Matelea carolinensis | Asclepiadaceae | maroon Carolina milkvine | spinypod |
| Matelea gonocarpos | Asclepiadaceae | common anglepod | angularfruit milkvine |
| Matelea obliqua | Asclepiadaceae | climbing milkvine | |
| Melilotus alba | Fabaceae | white sweet clover | |
| Melilotus officinalis | Fabaceae | yellow sweet clover | |
| Melothria pendula | Cucurbitaceae | creeping cucumber | Guadeloupe cucumber |
| Menispermum canadense | Menispermaceae | common moonseed | |
| Mentha piperita | Lamiaceae | peppermint | |
| Mertensia virginica | Boraginaceae | Virginia bluebells | |
| Metasequoia glyptostroboides | Taxodiaceae | dawn redwood | |
| Metrosideros sp. | Myrtaceae | O'hia lehua | |
| Minuartia patula | Caryophyllaceae | glade sandwort | Arenaria patula, pitcher's stitchwort |
| Mitchella repens | Rubiaceae | partridgeberry | |
| Mitella diphylla | Saxifragaceae | two leaf miterwort | bishop's cap |
| Monarda bradburiana | Lamiaceae | eastern beebalm | |
| Monarda citriodora | Lamiaceae | lemon beebalm | |
| Monarda didyma | Lamiaceae | scarlet beebalm | |
| Monarda fistulosa | Lamiaceae | wild bergamot | |
| Monotropa hypopithys | Ericaceae | pinesap | |
| Monotropa uniflora | Ericaceae | Indian pipe | |
| Morus rubra | Moraceae | red mulberry | |
| Muscari botryoides | Liliaceae | common grape hyacinth | |
| Myosotis macrosperma | Boraginaceae | large seed forget-me-not | |
| Narcissus pseudonarcissus | Liliaceae | daffodil | |
| Nelumbo lutea | Nelumbonaceae | American lotus | |
| Nemophila aphylla | Hydrophyllaceae | smallflower baby blue eyes | Nemophila triloba |
| Nepeta cataria | Lamiaceae | catnip | |
| Nolina microcarpa | Liliaceae | beargrass | sacahuista, basketgrass, nolina |
| Nothoscordum bivalve | Liliaceae | false garlic | crow poison |
| Nymphaea odorata | Nymphaeaceae | fragrant water lily | American white waterlily |
| Nyssa aquatica | Nyssaceae | water tupelo | |
| Nyssa biflora | Nyssaceae | swamp tupelo | |
| Nyssa sylvatica | Nyssaceae | blackgum | |
| Obolaria virginica | Gentianaceae | Virginia pennywort | |
| Oenothera biennis | Onagraceae | common evening primrose | |
| Oenothera macrocarpa ssp. macrocarpa | Onagraceae | Missouri evening primrose | Oenothera missouriensis, bigfruit evening primrose |
| Oenothera speciosa | Onagraceae | pinkladies | |
| Oenothera triloba | Onagraceae | stemless evening primrose | |
| Olneya tesota | Fabaceae | desert ironwood | palo de hierro, tesota, palo fierro, Arizona ironwood |
| Onosmodium molle | Boraginaceae | false gromwell | soft hair marble seed |
| Ophioglossum engelmannii | Ophioglossaceae | limestone adderstongue | |
| Oplopanax horridus | Araliaceae | devil's club | |
| Opuntia acanthocarpa | Cactaceae | buckhorn cholla | yellow flowered cane cactus |
| Opuntia arbuscula | Cactaceae | pencil cholla | Arizona pencil cholla |
| Opuntia bigelovii | Cactaceae | teddy bear cholla | silver cholla, teddy bear cactus |
| Opuntia clavata | Cactaceae | club cholla | |
| Opuntia engelmannii | Cactaceae | Englemann's prickly pear | cactus apple, tuna, nopal, purple fruit prickly pear, Opuntia phaeacantha var. discata |
| Opuntia engelmannii var. linguiformis | Cactaceae | cow's tongue cactus | |
| Opuntia fulgida | Cactaceae | chain fruit cholla | jumping cholla, chain cholla |
| Opuntia humifusa | Cactaceae | eastern prickly pear | devil's-tongue |
| Opuntia leptocaulis | Cactaceae | desert Christmas cactus | tesajo, Christmas cholla, pencil joint cholla, holycross cholla, diamond cactus, darning needle cactus |
| Opuntia santa-rita | Cactaceae | Santa Rita prickly pear | |
| Opuntia spinosior | Cactaceae | cane cholla | |
| Ornithogalum umbellatum | Liliaceae | star of Bethlehem | sleepydick |
| Osmorhiza claytonii | Apiaceae | Clayton's sweet cicely | Clayton's sweetroot |
| Osmorhiza longistylis | Apiaceae | long style sweetroot | |
| Ostrya virginiana | Betulaceae | hophornbeam | |
| Oxalis grandis | Oxalidaceae | great yellow woodsorrel | |
| Oxalis montana | Oxalidaceae | northern wood sorrel | mountain wood sorrel, Oxalis acetosella |
| Oxalis oregana | Oxalidaceae | redwood sorrel | Oregon oxalis |
| Oxalis priceae | Oxalidaceae | Price's woodsorrel | Oxalis macrantha, tufted yellow woodsorrel |
| Oxalis stricta | Oxalidaceae | yellow wood-sorrel | common yellow oxalis |
| Oxalis violacea | Oxalidaceae | violet wood-sorrel | |
| Oxydendrum arboreum | Ericaceae | sourwood | |
| Pachycereus pringlei | Cactaceae | cardon | |
| Pachysandra procumbens | Buxaceae | Allegheny spurge | |
| Parnassia asarifolia | Saxifragaceae | kidneyleaf grass of Parnassus | |
| Packera anonyma | Asteraceae | southern ragwort | Small's ragwort, Senecio anonymus, Senecio smallii |
| Packera aurea | Asteraceae | golden ragwort | Senecio aureus |
| Packera glabella | Asteraceae | butterweed | Senecio glabellus, golden ragwort |
| Packera obovata | Asteraceae | roundleaf ragwort | Senecio obovatus |
| Papaver rhoeas | Papaveraceae | corn poppy | |
| Parkinsonia aculeata | Fabaceae | Mexican paloverde | Jerusalem thorn, horse bean |
| Parkinsonia florida | Fabaceae | blue paloverde | Cercidium floridum |
| Parkinsonia microphylla | Fabaceae | yellow paloverde | Cercidium microphyllum, foothill paloverde, littleleaf paloverde |
| Parthenium integrifolium | Asteraceae | wild quinine | |
| Panax quinquefolius | Araliaceae | American ginseng | |
| Parthenocissus quinquefolia | Vitaceae | Virginia creeper | |
| Passiflora incarnata | Passifloraceae | purple passionflower | |
| Passiflora lutea | Passifloraceae | yellow passion flower | |
| Paulownia tomentosa | Bignoniaceae | princess-tree | empress-tree |
| Pedicularis canadensis | Scrophulariaceae | wood betony | forest lousewort |
| Pediomelum subacaule | Fabaceae | glade potato | whiterim scurfpea, Nashville breadroot, Psoralea subacaulis |
| Peniocereus greggii | Cactaceae | desert night blooming cereus | Cereus greggii, Arizona queen of the night |
| Penstemon calycosus | Scrophulariaceae | small beardtongue | |
| Penthorum sedoides | Saxifragaceae | ditch stonecrop | |
| Penstemon smallii | Scrophulariaceae | Small's beardtongue | |
| Penstemon tenuiflorus | Scrophulariaceae | eastern whiteflower beardtongue | |
| Perilla frutescens | Lamiaceae | beefsteak plant | |
| Phacelia bipinnatifida | Hydrophyllaceae | fernleaf phacelia | purple phacelia |
| Phacelia dubia ssp. interior | Hydrophyllaceae | glade phacelia | smallflower phacelia |
| Phacelia purshii | Hydrophyllaceae | Miami mist | |
| Phegopteris hexagonoptera | Thelypteridaceae | broad beechfern | |
| Philadelphus inodorus | Hydrangeaceae | scentless mock orange | |
| Phleum pratense | Poaceae | timothy | |
| Phlox amoena | Polemoniaceae | hairy phlox | |
| Phlox bifida ssp. stellaria | Polemoniaceae | glade phlox | |
| Phlox divaricata | Polemoniaceae | blue phlox | wild blue phlox |
| Phlox paniculata | Polemoniaceae | garden phlox | fall phlox |
| Phlox pilosa | Polemoniaceae | downy phlox | |
| Phoradendron juniperinum | Viscaceae | juniper mistletoe | |
| Phoradendron leucarpum | Viscaceae | oak mistletoe | Phoradendron flavescens, Phoradendron serotinum |
| Photinia pyrifolia | Rosaceae | red chokeberry | Aronia arbutifolia, Pyrus arbutifolia, Sorbus arbutifolia |
| Phragmites australis | Poaceae | common reed | |
| Phryma leptostachya | Verbenaceae | American lopseed | |
| Phyla lanceolata | Verbenaceae | lance leaf fogfruit | |
| Phytolacca americana | Phytolaccaceae | American pokeweed | |
| Pinus clausa | Pinaceae | sand pine | |
| Pinus elliottii | Pinaceae | slash pine | |
| Picea engelmannii | Pinaceae | Engelmann spruce | |
| Pinus flexilis | Pinaceae | limber pine | |
| Picea glauca | Pinaceae | white spruce | |
| Picea mariana | Pinaceae | black spruce | |
| Picea pungens | Pinaceae | blue spruce | |
| Picea rubens | Pinaceae | red spruce | |
| Picea sitchensis | Pinaceae | Sitka spruce | |
| Pilea pumila | Urticaceae | clearweed | |
| Pilosocereus alensis | Cactaceae | Sonoran old man cactus | Cephalocereus alensis |
| Pinus albicaulis | Pinaceae | whitebark pine | |
| Pinus aristata | Pinaceae | bristlecone pine | |
| Pinus arizonica var. arizonica | Pinaceae | Arizona pine | |
| Pinus cembroides | Pinaceae | Mexican pinyon | |
| Pinus contorta | Pinaceae | lodgepole pine | |
| Pinus coulteri | Pinaceae | Coulter pine | |
| Pinus echinata | Pinaceae | shortleaf pine | |
| Pinus edulis | Pinaceae | pinyon pine | two needle pinyon, nut pine, pinyon, Colorado pinyon pine, two leaf pinyon |
| Pinus engelmannii | Pinaceae | Apache pine | Arizona longleaf pine, Englemann pine |
| Pinus leiophylla var. chihuahuana | Pinaceae | Chihuahuan pine | |
| Pinus monticola | Pinaceae | western white pine | |
| Pinus palustris | Pinaceae | longleaf pine | |
| Pinus ponderosa | Pinaceae | ponderosa pine | western yellow pine, bull pine, blackjack pine |
| Pinus pungens | Pinaceae | Table Mountain pine | |
| Pinus resinosa | Pinaceae | red pine | Norway pine |
| Pinus rigida | Pinaceae | pitch pine | |
| Pinus strobiformis | Pinaceae | southwestern white pine | Pinus flexilis var. reflexa |
| Pinus strobus | Pinaceae | eastern white pine | |
| Pinus taeda | Pinaceae | loblolly pine | |
| Pinus virginiana | Pinaceae | Virginia pine | |
| Pityopsis graminifolia | Asteraceae | narrowleaf silkgrass | |
| Plantago aristata | Plantaginaceae | large bracted plantain | |
| Platanthera ciliaris | Orchidaceae | yellow fringed orchid | |
| Platanthera cristata | Orchidaceae | crested yellow orchid | |
| Platanthera integrilabia | Orchidaceae | monkeyface | white fringeless orchid |
| Plantago lanceolata | Plantaginaceae | narrowleaf plantain | |
| Platanthera nivea | Orchidaceae | snowy orchid | |
| Platanthera peramoena | Orchidaceae | purple fringeless orchid | |
| Plantago rugelii | Plantaginaceae | blackseed plantain | |
| Plantago virginica | Plantaginaceae | dwarf plantain | Virginia plantain |
| Platanus occidentalis | Platanaceae | American sycamore | |
| Platanus wrightii | Platanaceae | Arizona sycamore | plane tree, button wood |
| Pleopeltis polypodioides ssp. michauxiana | Polypodiaceae | resurrection fern | Polypodium polypodioides |
| Pleurochaete squarrosa | Pottiaceae | square pleurochaete moss | |
| Poa annua | Poaceae | annual bluegrass | |
| Poa pratensis | Poaceae | Kentucky bluegrass | |
| Podophyllum peltatum | Berberidaceae | mayapple | |
| Polemonium reptans | Polemoniaceae | Jacob's ladder | Greek valerian |
| Polygala sanguinea | Polygalaceae | field milkwort | purple milkwort |
| Polygonatum biflorum | Liliaceae | smooth Solomon's seal | |
| Polygonum bistortoides | Polygonaceae | American bistort | |
| Polygonum virginianum | Polygonaceae | jumpseed | Virginia knotweed |
| Polymnia canadensis | Asteraceae | pale flowered leafcup | white bear's foot, white flower leafcup |
| Polystichum acrostichoides | Dryopteridaceae | Christmas fern | |
| Polytrichum juniperinum | Polytrichaceae | juniper polytrichum moss | |
| Pontederia cordata | Pontederiaceae | pickerelweed | blue pickerelweed |
| Populus balsamifera ssp. trichocarpa | Salicaceae | black cottonwood | |
| Populus deltoides | Salicaceae | cottonwood | |
| Populus grandidentata | Salicaceae | bigtooth aspen | |
| Populus tremuloides | Salicaceae | quaking aspen | golden aspen, trembling poplar |
| Polygonum scandens | Polygonaceae | climbing false buckwheat | |
| Porteranthus stipulatus | Rosaceae | Indian physic | |
| Potentilla recta | Rosaceae | sulfur cinquefoil | rough fruited cinquefoil,sulphur cinquefoil |
| Potentilla simplex | Rosaceae | common cinquefoil | |
| Prosopis glandulosa ssp. torreyana | Fabaceae | western honey mesquite | |
| Prosopis velutina | Fabaceae | velvet mesquite | |
| Prunella vulgaris | Lamiaceae | common self heal | heal all |
| Prunus americana | Rosaceae | American plum | |
| Prunus angustifolia | Rosaceae | Chickasaw plum | |
| Prunus munsoniana | Rosaceae | Munson's plum | wild goose plum |
| Prunus pensylvanica | Rosaceae | pin cherry | |
| Prunus persica | Rosaceae | peach | |
| Prunus serotina | Rosaceae | black cherry | |
| Prunus virginiana | Rosaceae | chokecherry | |
| Pseudognaphalium obtusifolium ssp. obtusifolium | Asteraceae | rabbittobacco | Gnaphalium obtusifolium |
| Pseudoroegneria spicata ssp. spicata | Poaceae | bluebunch wheatgrass | Agropyron spicatum |
| Pseudotsuga menziesii | Pinaceae | Douglas fir | |
| Psilotum nudum | Psilotaceae | whisk fern | |
| Pteridium aquilinum | Dennstaedtiaceae | western brackenfern | |
| Pueraria montana | Fabaceae | kudzu | |
| Purshia stansburiana | Rosaceae | cliff rose | Stansbury cliff rose |
| Pycnanthemum pycnanthemoides | Lamiaceae | southern mountain mint | Pycnanthemum incanum ssp. pycnanthemoides |
| Pyrrhopappus carolinianus | Asteraceae | false dandelion | Carolina desert chicory |
| Pyrus calleryana | Rosaceae | Bradford pear | Callery pear |
| Pyrus communis | Rosaceae | common pear | |
| Quercus alba | Fagaceae | white oak | |
| Quercus bicolor | Fagaceae | swamp white oak | |
| Quercus coccinea | Fagaceae | scarlet oak | |
| Quercus falcata | Fagaceae | southern red oak | |
| Quercus gambelii | Fagaceae | Gambel oak | Rocky Mountain white oak, Utah white oak |
| Quercus garryana | Fagaceae | Oregon white oak | Garry oak |
| Quercus hypoleucoides | Fagaceae | silverleaf oak | white leaf oak |
| Quercus imbricaria | Fagaceae | shingle oak | |
| Quercus laevis | Fagaceae | turkey oak | |
| Quercus lyrata | Fagaceae | overcup oak | |
| Quercus macrocarpa | Fagaceae | bur oak | |
| Quercus marilandica | Fagaceae | blackjack oak | |
| Quercus michauxii | Fagaceae | swamp chestnut oak | basket oak |
| Quercus muehlenbergii | Fagaceae | chinkapin oak | |
| Quercus myrtifolia | Fagaceae | myrtle oak | |
| Quercus nigra | Fagaceae | water oak | |
| Quercus pagoda | Fagaceae | cherrybark oak | Quercus falcata var. pagodifolia |
| Quercus palustris | Fagaceae | pin oak | |
| Quercus phellos | Fagaceae | willow oak | |
| Quercus prinus | Fagaceae | chestnut oak | Quercus montana |
| Quercus rubra | Fagaceae | northern red oak | |
| Quercus shumardii | Fagaceae | Shumard's oak | |
| Quercus stellata | Fagaceae | post oak | |
| Quercus velutina | Fagaceae | black oak | |
| Quercus virginiana | Fagaceae | live oak | |
| Ranunculus abortivus | Ranunculaceae | kidney-leaf buttercup | littleleaf buttercup |
| Ranunculus bulbosus | Ranunculaceae | bulbosus buttercup | St. Anthony's turnip |
| Ranunculus sardous | Ranunculaceae | hairy buttercup | Ranunculus parvulus |
| Ratibida pinnata | Asteraceae | gray coneflower | pinnate prairie coneflower |
| Rhexia mariana | Melastomataceae | Maryland meadow beauty | |
| Rhizophora mangle | Rhizophoraceae | American mangrove | |
| Rhododendron alabamense | Ericaceae | Alabama azalea | |
| Rhododendron albiflorum | Ericaceae | Cascade azalea | |
| Rhododendron calendulaceum | Ericaceae | flame azalea | |
| Rhododendron catawbiense | Ericaceae | Catawba rhododendron | Catawba rosebay, mountain rosebay, purple laurel |
| Rhododendron macrophyllum | Ericaceae | Pacific rhododendron | |
| Rhododendron maximum | Ericaceae | rosebay rhododendron | great rhododendron, rosebay, great laurel |
| Rhododendron periclymenoides | Ericaceae | pink azalea | |
| Rhododendron prinophyllum | Ericaceae | early azalea | Rhododendron roseum, rose azalea |
| Rhus aromatica | Anacardiaceae | fragrant sumac | |
| Rhus copallinum | Anacardiaceae | winged sumac | Rhus copallina, shining sumac |
| Rhus glabra | Anacardiaceae | smooth sumac | |
| Rhus hirta | Anacardiaceae | staghorn sumac | Rhus typhina |
| Rhus trilobata | Anacardiaceae | skunk bush | skunk bush sumac, squaw bush, lemonade sumac, limonita, lemonade berry, lemita, three leaf sumac |
| Robinia pseudoacacia | Fabaceae | black locust | |
| Rosa carolina | Rosaceae | Carolina rose | pasture rose |
| Rosa multiflora | Rosaceae | multiflora rose | |
| Rosa setigera | Rosaceae | prarie rose | climbing rose |
| Rubus allegheniensis | Rosaceae | Allegheny blackberry | |
| Rubus argutus | Rosaceae | southern blackberry | sawtooth blackberry |
| Rubus flagellaris | Rosaceae | northern dewberry | |
| Rubus occidentalis | Rosaceae | black raspberry | |
| Rubus odoratus | Rosaceae | purpleflowering raspberry | |
| Rubus parviflorus | Rosaceae | thimbleberry | |
| Rubus sp. | Rosaceae | blackberry | |
| Rudbeckia fulgida | Asteraceae | orange coneflower | |
| Rudbeckia hirta | Asteraceae | black eyed Susan | |
| Rudbeckia laciniata | Asteraceae | cutleaf coneflower | green headed coneflower |
| Rudbeckia triloba | Asteraceae | brown eyed Susan | thin leaf coneflower |
| Ruellia caroliniensis | Acanthaceae | Carolina wild petunia | |
| Ruellia humilis | Acanthaceae | fringeleaf wild petunia | |
| Ruellia strepens | Acanthaceae | limestone wild petunia | |
| Rumex acetosella | Polygonaceae | sheep sorrel | |
| Rumex crispus | Polygonaceae | curly dock | |
| Rumex obtusifolius | Polygonaceae | broadleaf dock | bitter dock |
| Sabatia angularis | Gentianaceae | rose pink | |
| Sabatia quadrangula | Gentianaceae | fourangle rose gentian | |
| Salix babylonica | Salicaceae | weeping willow | |
| Salix caroliniana | Salicaceae | Carolina willow | coastal plain willow |
| Salix nigra | Salicaceae | black willow | |
| Salvia lyrata | Lamiaceae | lyreleaf sage | |
| Sambucus nigra ssp. canadensis | Caprifoliaceae | common elder | Sambucus canadensis, elderberry |
| Sambucus racemosa ssp. racemosa | Caprifoliaceae | red elderberry | Sambucus racemosa ssp. pubens |
| Sanguinaria canadensis | Papaveraceae | bloodroot | |
| Sanicula canadensis | Apiaceae | Canada black snakeroot | |
| Sapindus saponaria ssp. drummondii | Sapindaceae | western soapberry | jaboncillo, cherioni |
| Saponaria officinalis | Caryophyllaceae | bouncing bet | soapwort |
| Sarracenia flava | Sarraceniaceae | yellow pitcherplant | |
| Sarracenia purpurea | Sarraceniaceae | purple pitcherplant | |
| Sassafras albidum | Lauraceae | sassafras | |
| Saururus cernuus | Saururaceae | lizard’s tail | |
| Salvia urticifolia | Lamiaceae | nettleleaf sage | |
| Saxifraga virginiensis | Saxifragaceae | early saxifrage | |
| Schoenolirion croceum | Liliaceae | yellow sunnybell | |
| Schizachyrium scoparium | Poaceae | little bluestem | |
| Scutellaria elliptica | Lamiaceae | hairy skullcap | |
| Scutellaria ovata | Lamiaceae | heart leaf skullcap | |
| Scutellaria parvula | Lamiaceae | small skullcap | |
| Sedum pulchellum | Crassulaceae | pink stonecrop | sedum, widow's cross |
| Serenoa repens | Arecaceae | saw palmetto | |
| Sedum sarmentosum | Crassulaceae | stringy stonecrop | |
| Sedum ternatum | Crassulaceae | white stonecrop | woodland stonecrop, mountain stonecrop, rock cress sedum |
| Selaginella apoda | Selaginellaceae | meadow spikemoss | |
| Selaginella oregana | Selaginellaceae | Oregon spikemoss | |
| Senna marilandica | Fabaceae | southern wild senna | Maryland senna |
| Sequoia sempervirens | Taxodiaceae | redwood | |
| Sequoiadendron giganteum | Taxodiaceae | giant sequoia | |
| Sherardia arvensis | Rubiaceae | blue field madder | |
| Sideroxylon lycioides | Sapotaceae | buckthorn bully | Bumelia lycioides, smooth southern buckthorn |
| Silene latifolia | Caryophyllaceae | white campion | |
| Silene latifolia ssp. alba | Caryophyllaceae | snowy campion | Silene alba |
| Silphium mohrii | Asteraceae | shaggy rosinweed | Mohr's rosinweed |
| Silene regia | Caryophyllaceae | royal catchfly | |
| Silene virginica | Caryophyllaceae | fire pink | |
| Silene vulgaris | Caryophyllaceae | bladder campion | maidenstears |
| Silphium laciniatum | Asteraceae | compass plant | |
| Silphium perfoliatum | Asteraceae | cup plant | |
| Silphium pinnatifidum | Asteraceae | cutleaf praire dock | tansy rosinweed,Silphium terebinthinaceum var. pinnatifidum |
| Silphium terebinthinaceum | Asteraceae | prairie rosinweed | |
| Simmondsia chinensis | Simmondsiaceae | jojoba | coffee bush, gray box bush, goatnut, deernut, wild hazel, quinine plant, coffeeberry |
| Sisyrinchium albidum | Iridaceae | pale blue-eyed grass | white blue-eyed grass |
| Sisyrinchium angustifolium | Iridaceae | narrow leaf blue eyed grass | stout blue eyed grass |
| Silene stellata | Caryophyllaceae | starry campion | widow's frill |
| Smallanthus uvedalius | Asteraceae | yellow leafcup | Polymnia uvedalia, hairy leafcup, large flowered leafcup, bear's foot |
| Smilax bona-nox | Smilacaceae | saw greenbrier | |
| Smilax glauca | Smilacaceae | cat greenbrier | |
| Smilax rotundifolia | Smilacaceae | common greenbrier | round leaf greenbrier, cat brier |
| Solanum carolinense | Solanaceae | Carolina horsenettle | |
| Solanum ptychanthum | Solanaceae | eastern black nightshade | West Indian nightshade |
| Solidago canadensis | Asteraceae | Canada goldenrod | common goldenrod |
| Solidago gigantea | Asteraceae | great goldenrod | giant goldenrod, late goldenrod |
| Sonchus asper | Asteraceae | spiny sow thistle | prickly sow thistle |
| Sorbus americana | Rosaceae | mountain ash | |
| Sorghum halepense | Poaceae | Johnsongrass | |
| Spigelia marilandica | Loganiaceae | Indian pink | woodland pinkroot |
| Spiraea japonica | Rosaceae | Japanese meadowsweet | |
| Spiraea prunifolia | Rosaceae | bridalwreath spirea | |
| Spiranthes cernua | Orchidaceae | nodding ladies'-tresses | |
| Spiranthes ovalis | Orchidaceae | October ladies'-tresses | |
| Sporobolus vaginiflorus | Poaceae | poverty dropseed | |
| Spiranthes vernalis | Orchidaceae | spring lady's tresses | |
| Stachys clingmanii | Lamiaceae | Clingman's hedge nettle | |
| Stenanthium gramineum | Liliaceae | eastern featherbells | |
| Stapelia hirsuta | Asclepiadaceae | carrion flower | |
| Staphylea trifolia | Staphyleaceae | American bladdernut | |
| Stellaria media | Caryophyllaceae | common chickweed | |
| Stellaria pubera | Caryophyllaceae | giant chickweed | star chickweed |
| Stenocereus eruca | Cactaceae | creeping devil cactus | chirinole, Cereus eruca, Machaerocereus eruca, Lemaireocereus eruca, Rathbunia eruca |
| Stenocereus thurberi | Cactaceae | organpipe cactus | Cereus thurberi, Lemaireocereus thurberi, pitahaya dulce |
| Streptopus amplexifolius | Liliaceae | twisted stalk | claspleaf twisted stalk |
| Stylosanthes biflora | Fabaceae | sidebeak pencilflower | |
| Stylophorum diphyllum | Papaveraceae | celandine poppy | |
| Streptopus roseus | Liliaceae | twisted stalk | Streptopus lanceolatus var. roseus |
| Symphoricarpos orbiculatus | Caprifoliaceae | coralberry | |
| Symphyotrichum novae-angliae | Asteraceae | New England aster | Aster novae-angliae |
| Symphyotrichum pilosum | Asteraceae | white heath aster | hairy white oldfield aster, Aster pilosus, awl aster |
| Syngonanthus flavidulus | Eriocaulaceae | hatpins | |
| Talinum calcaricum | Portulacaceae | limestone fameflower | |
| Taraxacum officinale | Asteraceae | common dandelion | |
| Taxodium distichum | Taxodiaceae | bald cypress | |
| Taxus brevifolia | Taxaceae | Pacific yew | |
| Taxus sp. | Taxaceae | yew | |
| Thaspium barbinode | Apiaceae | hairyjoint meadow parsnip | |
| Thalictrum clavatum | Ranunculaceae | cliff meadow rue | mountain meadow rue |
| Thalictrum revolutum | Ranunculaceae | skunk meadow rue | waxyleaf meadow rue |
| Thalictrum thalictroides | Ranunculaceae | rue anemone | Anemonella thalictroides |
| Thaspium trifoliatum var. trifoliatum | Apiaceae | purple meadowparsnip | |
| Thelypteris palustris var. pubescens | Thelypteridaceae | eastern marsh fern | |
| Thuja occidentalis | Cupressaceae | arborvitae | |
| Thuja plicata | Cupressaceae | western red cedar | |
| Tiarella cordifolia | Saxifragaceae | heart leaf foam flower | |
| Tiarella trifoliata | Saxifragaceae | threeleaf foamflower | |
| Tilia americana ssp. heterophylla | Tiliaceae | white basswood | Tilia heterophylla |
| Tillandsia usneoides | Bromeliaceae | Spanish moss | |
| Tipularia discolor | Orchidaceae | cranefly orchid | |
| Torilis arvensis | Apiaceae | field hedge parsley | spreading hedge parsley, Torilis japonica |
| Tofieldia racemosa | Liliaceae | coastal false asphodel | Triantha racemosa |
| Toxicodendron radicans | Anacardiaceae | eastern poison ivy | Rhus radicans |
| Tradescantia subaspera | Commelinaceae | wide leaved spiderwort | zigzag spiderwort, harsh spiderwort |
| Tradescantia virginiana | Commelinaceae | Virginia spiderwort | |
| Trichostema brachiatum | Lamiaceae | fluxweed | Isanthus brachiatus |
| Tragia cordata | Euphorbiaceae | heartleaf noseburn | heart leaved tragia |
| Tragopogon dubius | Asteraceae | yellow goatsbeard | yellow salsify |
| Trifolium campestre | Fabaceae | low hop trefoil | field clover, Trifolium procumbens |
| Trifolium dubium | Fabaceae | least hop trefoil | least hop clover, suckling clover |
| Trifolium hybridum | Fabaceae | alsike clover | |
| Trifolium pratense | Fabaceae | red clover | |
| Trifolium repens | Fabaceae | white clover | |
| Trillium cuneatum | Liliaceae | little sweet Betsy | |
| Trillium flexipes | Liliaceae | white trillium | bent trillium, nodding wakerobin |
| Trillium recurvatum | Liliaceae | prairie trillium | bloody butcher |
| Trillium sessile | Liliaceae | sessile trillium | |
| Trillium stamineum | Liliaceae | twisted petal trillium | |
| Triodanis perfoliata | Campanulaceae | clasping Venus' looking-glass | |
| Triosteum angustifolium | Caprifoliaceae | yellow fruit horse gentian | |
| Triticum aestivum | Poaceae | common wheat | |
| Tsuga canadensis | Pinaceae | eastern hemlock | |
| Tsuga heterophylla | Pinaceae | western hemlock | |
| Tsuga mertensiana | Pinaceae | mountain hemlock | |
| Tussilago farfara | Asteraceae | coltsfoot | |
| Typha latifolia | Typhaceae | broadleaf cattail | |
| Ulmus alata | Ulmaceae | winged elm | |
| Ulmus americana | Ulmaceae | American elm | |
| Ulmus rubra | Ulmaceae | slippery elm | |
| Ulmus serotina | Ulmaceae | September elm | |
| Urtica chamaedryoides | Urticaceae | heartleaf nettle | |
| Utricularia sp. | Lentibulariaceae | bladderwort | |
| Uvularia grandiflora | Liliaceae | large flower bellwort | |
| Uvularia perfoliata | Liliaceae | perfoliate bellwort | |
| Vaccinium arboreum | Ericaceae | farkleberry | sparkleberry |
| Vaccinium pallidum | Ericaceae | lowbush blueberry | Blue Ridge blueberry |
| Vaccinium parvifolium | Ericaceae | red huckleberry | |
| Valeriana pauciflora | Valerianaceae | largeflower valerian | |
| Vaccinium stamineum | Ericaceae | deerberry | |
| Valerianella radiata | Valerianaceae | beaked corn salad | |
| Valerianella umbilicata | Valerianaceae | navel cornsalad | |
| Veratrum viride | Liliaceae | green false hellebore | |
| Verbascum blattaria | Scrophulariaceae | moth mullein | |
| Verbascum thapsus | Scrophulariaceae | common mullein | |
| Verbena simplex | Verbenaceae | narrow leaf vervain | narrow leaved vervain |
| Verbena urticifolia | Verbenaceae | white vervain | |
| Verbesina alternifolia | Asteraceae | yellow wingstem | wingstem, Actinomeris alternifolia |
| Verbesina virginica | Asteraceae | white crownbeard | frostweed |
| Vernonia gigantea | Asteraceae | giant ironweed | |
| Veronica hederifolia | Scrophulariaceae | ivy leaf speedwell | ivy leaved speedwell |
| Veronica persica | Scrophulariaceae | birdeye speedwell | |
| Veronica polita | Scrophulariaceae | gray field speedwell | |
| Veronica serpyllifolia | Scrophulariaceae | thymeleaf speedwell | |
| Viburnum acerifolium | Caprifoliaceae | maple leaf viburnum | |
| Viburnum dentatum | Caprifoliaceae | arrowwood | |
| Viburnum lantanoides | Caprifoliaceae | hobblebush | witch hobble |
| Viburnum opulus var. americanum | Caprifoliaceae | high bush cranberry | Viburnum trilobum |
| Viburnum prunifolium | Caprifoliaceae | blackhaw | |
| Viburnum rufidulum | Caprifoliaceae | rusty blackhaw | |
| Vicia caroliniana | Fabaceae | wood vetch | white vetch, Carolina vetch |
| Vicia sativa ssp. nigra | Fabaceae | purple vetch | garden vetch, Vicia angustifolia |
| Vicia villosa ssp. varia | Fabaceae | smooth vetch | winter vetch |
| Vinca minor | Apocynaceae | common periwinkle | |
| Viola bicolor | Violaceae | field pansy | Viola rafinesquei |
| Viola canadensis | Violaceae | Canadian white violet | |
| Viola egglestonii | Violaceae | glade violet | |
| Viola palmata | Violaceae | three lobed violet | early blue violet |
| Viola pedata | Violaceae | bird foot violet | |
| Viola pubescens | Violaceae | downy yellow violet | Viola eriocarpa, yellow woodland violet |
| Viola sororia | Violaceae | common blue violet | |
| Viola striata | Violaceae | striped cream violet | |
| Vitis vulpina | Vitaceae | frost grape | winter grape |
| Wisteria frutescens | Fabaceae | American wisteria | |
| Wisteria sinensis | Fabaceae | Chinese wisteria | |
| Woodsia obtusa | Dryopteridaceae | blunt lobe cliff fern | |
| Xanthium strumarium | Asteraceae | rough cockleburr | |
| Xyris caroliniana | Xyridaceae | Carolina yellow eyed grass | |
| Xyris tennesseensis | Xyridaceae | Tennessee yelloweyed grass | |
| Yucca brevifolia | Agavaceae | Joshua tree | tree yucca, yucca palm |
| Yucca elata | Agavaceae | soaptree yucca | |
| Yucca flaccida | Agavaceae | Adam's needle | Spanish bayonet |
| Yucca schottii | Agavaceae | Schott's yucca | mountain yucca |
| Zanthoxylum americanum | Rutaceae | common prickly ash | |
| Zizia aurea | Apiaceae | golden Alexanders | golden zizia |