Abrus precatorius

Rosary Pea

Aconitum spp.

Monkshood, Aconite, or Wolfsbane

Actaea spp.

Baneberry and Doll's-eyes

Aesculus spp.

Horse Chestnut, Buckeye

Agrostemma githago

Corn Cockle

Aleurites fordii

Tung Oil Tree

Allium spp.

Wild Onions, Swamp Onions, and Chives

Amanita spp.

Death Angel and other mushrooms

Amaranthus spp.

Pigweed

Amsinckia intermedia

Fiddleneck

Apocynum spp.

Dogbane

Argemone mexicana

Prickly Poppy or Mexican Poppy

Arisaema spp.

Jack-in-the-Pulpit

Asclepias spp.

Milkweed

Astragalus and Oxytropis spp.

Locoweed

Atropa belladonna

Belladonna or Deadly Nightshade

Brassica spp.

Rape, Cabbage, Turnips, Broccoli, Mustard

Caltha palustris

Marsh Marigold or Cowslip

Cannabis sativa

Marijuana

Centaurea solstitialis

Yellow Star Thistle

Chelidonium majus

Celandine

Chenopodium album

Lamb's Quarters

Cicuta spp.

Water Hemlock or Cowbane

Claviceps spp.

Ergot

Conium maculatum

Poison Hemlock

Coronilla varia

Crown Vetch

Convallaria majalis

Lily-of-the-Valley

Daphne spp.

Daphne

Datura spp.

Jimsonweed, Devil's and Angel’s Trumpet

Delphinium spp.

Delphiniums and Larkspurs

Dicentra spp.

Bleeding Heart, Dutchman's Breeches

Digitalis purpurea

Foxglove

Equisetum arvense and other spp.

Horsetail

Eupatorium rugosum

White Snakeroot

Euphorbia spp.

Poinsettia, Spurges, Snow-on-the-Mountain

Fagoypyrum esculentum

Buckwheat

Festuca arundinacea

Tall Fescue

Gelsemium sempervirens

Jessamine

Glechoma spp.

Ground Ivy, Creeping Charlie

Halogeton glomeratus

Halogeton

Helleborus niger

Christmas Rose

Hyoscyanmus niger

Henbane

Hypericum perforatum

St. John's Wort

Iris spp.

Irises

Laburnum anagyroides

Golden Chain or Laburnum

Lantana camara

Lantana, Red Sage, Yellow Sage

Lathyrus spp.

Sweet Pea, Everlasting Pea, Singletary Pea

Leucothoe axillaris and L. davisiae

Drooping Leucothoe and Sierra Laurel

Linum usitatissimum

Flax

Lobelia spp.

Cardinal Flower, and Indian Tobacco

Lotus corniculatus

Birdsfoot Trefoil

Lupinus spp.

Lupine

Medicago sativa

Alfalfa or Lucerne

Melilotus albaand Melilotus officinalis

White and Yellow Sweetclover

Menispermum canadense

Moonseed

Nerium oleander

Oleander

Nicotiana spp.

Tobacco and Tree Tobacco

Onoclea sensibis

Sensitive Fern

Ornithogalum umbellatum

Star-of-Bethlehem

Papaver spp.

Poppies including Opium Poppy

Phytolacca americana

Pokeweed

Pieris japonica

Japanese Pieris, Mountain Fetterbush

Pinus ponderosa

Ponderosa Pine

Podophyllum peltatum

Mayapple and Mandrake

Prunus spp.

Wild Cherries, Black Cherry, Choke Cherry

Pteridium aquilinium

Bracken Fern

Quercus spp.

Oak Trees

Ranunculus spp.

Buttercups or Crowfoot

Rheum rhaponticum

Rhubarb

Ricinus communis

Castor Bean

Robinia pseudoacacia

Black Locust

Rumex spp.

Dock

Sambucus canadensis

Elderberry

Sanquinaria canadensis

Bloodroot

Saponaria spp.

Bouncing Bet and Cow Cockle

Senecio spp.

Senecio, Groundsels, and Ragworts

Solanum spp.

Common Nightshade, Buffalo Bur, Potato

Sorghum spp.

Sorghum, Milo, Sudan Grass, Johnson Grass

Symplocarpus foetidus

Eastern Skunk Cabbage

Taxus cuspidata

Yew

Tetradymia spp.

Horsebrush

Toxicodendron diversiloba

Poison oak

Toxicodendron radicans

Poison ivy

Toxicodendron vernix

Poison Sumac

Trifolium spp.

Alsike Clover, Red Clover, White Clover

Triglochin maritima

Arrowgrass

Urtica spp.

Stinging Nettle

Vicia spp.

Vetch

Veratrum californicum

Corn Lily, False Hellbore

Wisteria spp.

Wisteria

Xanthium strumarium

Cocklebur

Zigadenus spp.

Death Camas