Poisonous and Dangerous Plants

By Jean Hofve, DVM

Aconite (Monkshood, Wolfsbane)

Agaricus Mushrooms

Aloe 1

Amanita Mushrooms

Amaryllis

Avocado (leaves, seeds)

Azalea

Baneberry

Black Walnut

Bleeding Heart

Bouncing Bet (Soapwort)

Bulbs (Lily, Daffodil, Tulip, Iris, Hyacinth, Amaryllis, Cyclamen, etc.)

Caladium

Catnip 2

Castor Bean (seeds)

Celandine

Cherries (Black Cherry, Bitter Cherry, Choke Cherry, Pin Cherry)

Christmas Rose

Clovers

Cocklebur

Coffee Tree ( Kentucky Mahogany, American Coffee Bean Tree, Nicker Tree)

Comfrey

Common Burdock

Cow Cockle

Curly Vetch

Creeping Charlie

Daffodil

Daphne

Death Camas

Delphinium

Dogbane

Doll’s-eyes

Dumbcane (Diffenbachia spp.)

Easter Lily

English Ivy

Ergot

Fireweed (Summer Cypress, Burning Bush)

Foxglove

Foxtail Barley

Garlic 3

Golden Chain (Laburnum)

Great Lobelia (Cardinal Flower, Indian Tobacco)

Ground Ivy (Creeping Charlie, Gill-over-the-Ground

Groundsels

Hemp (Cannabis spp.)

Henbane

Holly Berry

Horse Chestnut

Hyacinth

Hydrangea

Irises

Japanese Pieris

Japanese Yew

Jerusalem Cherry

Jessamine

Jimsonweed (Stinkweed, Thornapple, Mad Apple, Devil’s Trumpet, Angel’s Trumpet; Datura spp.)

Johnsongrass

Latana (Red Sage, Yellow Sage, West Indian Latana)

Larkspurs

Lily

Lily-of-the-Valley

Lupine (Bluebonnet)

Marijuana

Marsh Marigold (Cowslip)

Mayapple (Mandrake)

Mexican Poppy

Milkweed

Mistletoe

Monkshood

Narcissus

Nightshade (Black Nightshade, Deadly Nightshade)

Oak Trees

Oleander

Onions and Chives

Panther

Peace Lily (Spathiphyllum)

Philodendron

Pink Lady’s Slipper

Poison Hemlock, Water Hemlock

Poison Ivy

Poison Oak

Poison Sumac

Poinsettia

Pokeweed

Poppies

Potato (green, sprouts)

Pothos

Privet (berries)

Purple Mint

Red Maple

Redroot (Pigweed, Carelessweed)

Rhododendron

Rhubarb

Rosary Pea

Scarlet Pimpernel

Snow-on-the-Mountain

Spurges (Euphorbia spp.)

Stinging Nettle

Sweet Pea (Tangier Pea, Everlasting Pea, Caley Pea and Singletary Pea)

Tansy

Thorn Apple (Jimsonweed)

Tobacco (Tree Tobacco)

Tulips

Tung Oil Tree

Umbrella Tree

Virginia Creeper

Water Hemlock (Cowbane)

Wisteria

Yew


This list was compiled by Little Big Cat from sources at Cornell University, University of Illinois, University of Pennsylvania, the Canadian Poison Plants Information System, and Purdue University.

1. Aloe leaves contain latex, which can be irritating to the colon and may cause diarrhea.

2. Not all cats are responsive to catnip, and not all cats respond favorably. Some cats become aggressive on catnip. Never give your cat catnip before a visit to the veterinarian or other stressful event!

3. A member of the onion family, garlic can cause hemolytic anemia if consumed in large amounts.

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