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