White Snakeroot

Senecio, Ragwort

Water Hemlock

Poison Hemlock (naturally)

Cocklebur

Pigweed

Jimsonweed

Johnsongrass

Cherry bark fruit leaves

Yew (hedges and trees)

Red Maple

Easter Lily

Lily of the Valley

Mistletoe

Oleander

Rosary Pea

Bulbs (tulips, crocus, etc.)

Lupine

Rhubarb

Azalea, Rhododendron

Oats

Ergot

Fescue

Yellow, White Sweetclover

Tobacco

Larkspur

Brackenfern

Green False Hellebore

Milkweed

Horsetail

Mustards

Spurges

Nightshades (aka Bella Donna)

Buckeye, Horsechestnut

Black Walnut

Red Oak

Black Locus

Common Burdock

English Ivy (very common)

Catnip (very surprising!)

Poinsettia, Christmas Plant

Tansy

Alsike Clover

Jack-in-the-Pulpit

Dutchman's Breeches

Buttercups (includes daffodils, jonquils, etc.)

Stinging Nettle

Marijuana

St. Johnswort

Star of Bethlehem

Pokeweed

Bouncing Bet