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