Abrus precatorius
| precatory-pea |
Acer rubrum
| red maple |
Aconitum napellus
| monk's hood |
Aesculus glabra
| Ohio buckeye |
Aesculus hippocastanum
| horse-chestnut |
Agrostemma githago
| purple cockle |
Ailanthus altissima
| tree-of-heaven |
Allamanda cathartica
| golden-trumpet |
Allium canadense
| wild onion |
Allium cepa
| onion |
Allium sativum
| garlic |
Allium schoenoprasum
| chives |
Aloe arborescens
| candalabra aloe |
Aloe barbadensis
| aloe - A. barbadensis |
Alstroemeria ligtu
| Peruvian lily |
Amaranthus blitoides
| prostrate pigweed |
Amaranthus hybridus
| smooth pigweed |
Amaranthus retroflexus
| redroot pigweed |
Amaryllis belladonna
| amaryllis (A. belledonna) |
Amaryllis vittata
| amaryllis (A. vittata) |
Amelanchier alnifolia
| Saskatoon (a serviceberry) |
Amsinckia intermedia
| fiddleneck |
Anagallis arvensis
| scarlet pimpernel |
Anthurium andraeanum
| flamingo lily |
Apocynum androsaemifolium
| spreading dogbane |
Apocynum cannabinum
| hemp dogbane |
Arisaema triphyllum
| Jack-in-the-pulpit |
Armoracia rusticana
| horseradish |
Asarum canadense
| wild ginger |
Asclepias speciosa
| showy milkweed |
Asclepias syriaca
| common milkweed |
Asclepias verticillata
| eastern whorled milkweed |
Asimina triloba
| pawpaw |
Astragalus adsurgens
| Astragalus (A. adsurgens) |
Astragalus bisulcatus
| two-grooved milk-vetch |
Astragalus canadensis
| Canadian milk-vetch |
Astragalus lentiginosus
| Astragalus (A. lentiginosus) |
Astragalus miser
| timber milk-vetch |
Avena sativa
| oats |
Baptisia leucantha
| wild false indigo |
Baptisia tinctoria
| wild indigo |
Barbarea vulgaris
| yellow rocket |
Bassia hyssopifolia
| five-hooked bassia |
Brassaia actinophylla
| Australian umbrella tree |
Brassica campestris
| bird rape |
Brassica juncea
| Indian mustard |
Brassica napus
| rapeseed |
Brassica oleracea
| wild cabbage |
Caladium bicolor
| caladium |
Calla palustris
| wild calla |
Cannabis sativa
| marijuana |
Caulophyllum thalictroides
| blue cohosh |
Centaurea repens
| Russian knapweed |
Centaurea solstitialis
| yellow star-thistle |
Ceratocephalus testiculatus
| bur buttercup |
Chelidonium majus
| greater celandine |
Chenopodium album
| lamb's-quarters |
Chrysanthemum indicum
| chrysanthemum |
Chrysothamnus nauseosus
| stinking rabbitbrush |
Cicuta douglasii
| western water-hemlock |
Cicuta maculata
| spotted water-hemlock |
Cicuta virosa
| northern water-hemlock |
Clivia miniata
| Kaffir lily |
Codiaeum variegatum
| croton |
Colchicum autumnale
| autumn crocus |
Conium maculatum
| poison-hemlock |
Convallaria majalis
| lily-of-the-valley |
Cyclamen persicum
| cyclamen |
Cynoglossum officinale
| hound's tongue |
Cypripedium acaule
| pink lady's-slipper |
Cypripedium calceolus
| yellow lady's-slipper |
Cypripedium reginae
| showy lady's-slipper |
Daphne cneorum
| garland daphne |
Daphne laureola
| spurge-laurel |
Daphne mezereum
| February daphne |
Datura innoxia
| angel's trumpet |
Datura stramonium
| jimsonweed |
Delphinium bicolor
| low larkspur |
Delphinium glaucum
| tall larkspur |
Delphinium menziesii
| Menzies larkspur |
Descurainia pinnata
| green tansy mustard |
Dicentra canadensis
| squirrel-corn |
Dicentra cucullaria
| Dutchman's-breeches |
Dicentra formosa
| western bleedingheart |
Dictamnus albus
| gas plant |
Dieffenbachia amoena
| giant dumbcane |
Dieffenbachia bausei
| dumbcane |
Dieffenbachia maculata
| spotted dumbcane |
Dieffenbachia seguine
| mother-in-law plant |
Digitalis purpurea
| foxglove |
Dirca palustris
| leatherwood |
Echium vulgare
| blueweed |
Equisetum arvense
| field horsetail |
Equisetum palustre
| marsh horsetail |
Erysimum cheiranthoides
| wormseed mustard |
Euonymus atropurpureus
| burningbush |
Euonymus europaeus
| European spindletree |
Eupatorium rugosum
| white snakeroot |
Euphorbia cyparissias
| cypress spurge |
Euphorbia esula
| leafy spurge |
Euphorbia helioscopia
| sun spurge |
Euphorbia lactea
| candelabra-cactus |
Euphorbia lathyris
| caper spurge |
Euphorbia milii
| crown-of-thorns |
Euphorbia peplus
| petty spurge |
Euphorbia pulcherrima
| poinsettia |
Euphorbia tirucalli
| penciltree |
Fagopyrum esculentum
| buckwheat |
Galanthus nivalis
| snowdrop |
Ginkgo biloba
| maidenhair tree |
Glechoma hederacea
| ground-ivy |
Gloriosa superba
| glory lily |
Glyceria grandis
| tall manna grass |
Gutierrezia sarothrae
| broom snakeweed |
Gymnocladus dioicus
| Kentucky coffeetree |
Hedera helix
| English ivy |
Helenium autumnale
| sneezeweed |
Helenium flexuosum
| naked-flowered sneezeweed |
Helianthus annuus
| sunflower |
Heliotropium curassavicum
| spatulate-leaved heliotrope |
Heracleum mantegazzianum
| giant hogweed |
Humulus lupulus
| common hop |
Hyacinthoides nonscripta
| English bluebell |
Hydrangea macrophylla
| hydrangea |
Hymenoxys richardsonii
| Colorado rubberweed |
Hyoscyamus niger
| black henbane |
Hypericum perforatum
| St. John's-wort |
Ilex aquifolium
| English holly |
Ilex opaca
| American holly |
Ipomoea tricolor
| morning glory |
Iris pseudacorus
| yellow iris |
Iris versicolor
| blue flag iris |
Iva xanthifolia
| false ragweed |
Juglans nigra
| black walnut |
Kalanchoe daigremontiana
| Devil's-backbone |
Kalmia angustifolia
| sheep-laurel |
Kalmia polifolia
| bog-laurel |
Kochia scoparia
| kochia |
Laburnum anagyroides
| golden-chain |
Lactuca scariola
| prickly lettuce |
Lantana camara
| yellow sage |
Laportea canadensis
| Canada nettle |
Lathyrus odoratus
| sweet pea |
Lathyrus sativus
| grass pea |
Leonurus cardiaca
| motherwort |
Ligustrum vulgare
| common privet |
Linaria vulgaris
| yellow toadflax |
Lobelia cardinalis
| cardinalflower |
Lobelia inflata
| Indian-tobacco |
Lobelia siphilitica
| blue cardinalflower |
Lonicera tatarica
| Tartarian honeysuckle |
Lonicera xylosteum
| fly honeysuckle |
Lupinus argenteus
| silvery lupine |
Lupinus burkei
| Burke's lupine |
Lupinus polyphyllus
| large-leaved lupine |
Lupinus pusillus
| small lupine |
Lupinus sericeus
| silky lupine |
Maclura pomifera
| Osage-orange |
Mangifera indica
| mango |
Medicago sativa
| alfalfa |
Melilotus alba
| white sweet-clover |
Melilotus officinalis
| yellow sweet-clover |
Menispermum canadense
| moonseed |
Menziesia ferruginea
| western minniebush |
Monstera deliciosa
| Swiss-cheese plant |
Narcissus poeticus
| narcissus |
Narcissus pseudonarcissus
| daffodil |
Nerium oleander
| oleander |
Nicotiana tabacum
| tobacco |
Onoclea sensibilis
| sensitive fern |
Ornithogalum umbellatum
| star-of-Bethlehem |
Oxytropis lambertii
| purple locoweed |
Oxytropis sericea
| locoweed (Oxytropis sericea) |
Papaver nudicaule
| Iceland poppy |
Papaver orientale
| Oriental poppy |
Papaver rhoeas
| corn poppy |
Papaver somniferum
| opium poppy |
Parthenocissus quinquefolia
| Virginia creeper |
Pastinaca sativa
| wild parsnip |
Persea americana
| avocado |
Phacelia campanularia
| California bluebell |
Phalaris arundinacea
| reed canarygrass |
Philodendron cordatum
| philodendron |
Philodendron scandens
| heart-leaved philodendron |
Phoradendron flavescens
| American mistletoe |
Physalis alkekengi
| Chinese-lantern |
Physalis peruviana
| ground-cherry |
Phytolacca americana
| pokeweed |
Pinus ponderosa
| ponderosa pine |
Podophyllum peltatum
| May-apple |
Primula obconica
| primula |
Prunus pensylvanica
| pin cherry |
Prunus serotina
| black cherry |
Prunus virginiana
| red chokecherry |
Pteridium aquilinum
| bracken |
Quercus alba
| white oak |
Quercus rubra
| red oak |
Quercus velutina
| black oak |
Ranunculus bulbosus
| bulbous buttercup |
Ranunculus sceleratus
| celery-leaved buttercup |
Raphanus raphanistrum
| wild radish |
Raphanus sativus
| radish |
Rhamnus cathartica
| European buckthorn |
Rhamnus frangula
| alder buckthorn |
Rheum rhaponticum
| rhubarb |
Rhododendron albiflorum
| white rose-bay |
Rhododendron macrophyllum
| California rose-bay |
Rhus diversiloba
| western poison-oak |
Rhus radicans
| poison ivy |
Rhus vernix
| poison sumac |
Ricinus communis
| castor-bean |
Robinia pseudoacacia
| black locust |
Rudbeckia laciniata
| cut-leaved coneflower |
Rudbeckia serotina
| black-eyed Susan |
Rumex acetosa
| garden-sorrel |
Rumex acetosella
| sheep sorrel |
Rumex venosus
| veined dock |
Sambucus canadensis
| American elder |
Sambucus nigra
| European elder |
Sarcobatus vermiculatus
| greasewood |
Scilla siberica
| Siberian scilla |
Senecio integerrimus
| entire-leaved groundsel |
Senecio jacobaea
| tansy ragwort |
Senecio vulgaris
| common groundsel |
Sinapis arvensis
| wild mustard |
Solanum dulcamara
| climbing nightshade |
Solanum nigrum
| black nightshade |
Solanum pseudocapsicum
| Jerusalem-cherry |
Solanum tuberosum
| potato |
Solidago mollis
| velvety goldenrod |
Sorghum bicolor
| Sorghum |
Sorghum halepense
| Johnson grass |
Sorghum sudanense
| Sudan grass |
Suckleya suckleyana
| poison suckleya |
Symphoricarpos albus
| thin-leaved snowberry |
Symphytum asperum
| prickly comfrey |
Symphytum officinale
| common comfrey |
Symplocarpus foetidus
| skunk cabbage |
Tanacetum vulgare
| tansy |
Taxus baccata
| English yew |
Taxus canadensis
| Canada yew |
Taxus cuspidata
| Japanese yew |
Thermopsis rhombifolia
| golden-bean |
Thlaspi arvense
| stinkweed |
Trifolium hybridum
| alsike clover |
Trifolium pratense
| red clover |
Trifolium repens
| white clover |
Triglochin maritima
| seaside arrow-grass |
Triglochin palustre
| marsh arrow-grass |
Tulipa gesneriana
| tulip |
Urtica dioica
| stinging nettle |
Veratrum viride
| false hellebore |
Viburnum opulus
| Guelder-rose |
Vicia faba
| broad bean |
Vicia sativa
| common vetch |
Vicia villosa
| hairy vetch |
Wisteria floribunda
| Japanese wisteria |
Xanthium strumarium
| cocklebur |
Zigadenus elegans
| white camas |
Zigadenus venenosus
| death camas |
|
