Common Name

Scientific Name

Toxic Parts

System Affected

A

Alpenrose

Rhododendron Ferrugineum

Flowers, Leaves

Gastrointestinal

American Mistletoe

Phoradendrom Flavescens

Berries

Gastrointestinal

Apricot

Prunus Armeniaca

Pit

Cyanide Producer

Azalea

Rhododendron Alabamensis, Rhododendron Austrinum

All parts

Gastrointestinal

Amaryllis

Amaryllis,  Hippeastrum

Bulbs

Gastrointestinal, Neurological

Avocado

Persea americana

Fruit, Pit

Gastrointestinal

Aloe Vera

Aloe babrdensis, Aloe vera

All parts

Gastrointestinal

B

Bitter Almond

Prunus Dulcis Var. Amara

Bark, Leaves, Seeds

Cyanide producer

Black Locust

Robinia Pseudoacacia

Bark, green growth, seeds, thorns

Gastrointestinal, Cardiac, Neurological

Black Nightshade

Solanum Nigrum

All Parts

Gastrointestinal

Bluebonnet

Lupinus texensis

Seeds

Neurological

Boxwood

Buxus Sremervirens

All Parts

Cardiac, Gastrointestinal, Neurological

Bulbous Corydalis

Corydalis Cava

Bulbs

Neurological

Buttercup (meadow)

Ranunculus Sceleratus

All top growth

Gastrointestinal, neurological, renal

C

Caladium (sometimes called Elephant’s ear)

Caladium hortulanum

Leaves, stems, stalks

Stomatitis, glossitis

Castor Bean

Ricinus Communis

All Parts

Gastrointestinal, Neurological *contains ricin

Cherry Laurel

Prunus Laurocerasus

Pits and seeds

Cyanide producer

Chinaberry

Melia Azedarach

Fruit

Neurological

Chinese Evergreen

Aglaonema pseudobracteatum

Leaves

Stomatitis, Glossitis

Chinese Primrose

Primula Obconica

Sap

Dermatitis, slight gastrointestinal

Chinese Wisteria

Wisteria Sinensis

Seeds

Hepatic

Christmas Cherry

Solanum Pseudocapsicum

Berries

Gastrointestinal

Christmas Rose

Helleborus Niger

All Parts

Cardiac, gastrointestinal, neurological, dermatitis

Climbing Lily

Gloriosa Superba

All Parts

Gastrointestinal

Crocus

Crocus sativus, colchicum autumnale

Bulbs

Gastrointestinal, renal, cardiac

D

Daffodil

Narcissus Pseudonarcissus

Bulbs, All parts

Gastrointestinal

Deadly Nightshade

Solanum Nigrum, Atropa belladonna

All Parts

Gastrointestinal

Dieffenbachia

Sambucus Nigra

All parts

Stomatitis, glossitis

Daphne

Daphne cneorum, Daphne genkwa

Berries, seeds, All parts

Gastrointestinal, dermatitis, Renal

E

Elderberry

Sambucus canadensis

All parts, Bark, leaves

Gastrointestinal, Cyanide producer, toxic levels of nitrates

English Ivy

Hedera helix

Berries, leaves

Stomatitis, glossitis

Exotica Perfection Dieffenbachia

Dieffenbachia maculata

Sap, water that cuttings were in

Gastrointestinal

F

Foxglove

Digitalis purpurea

All parts

Cardiovascular, gastrointestinal

Fruit salad plant (philodendron)

Philodendron pertusum

All parts

Gastrointestinal, glossitis, stomatitis, dermatitis

Firethorn

Pyracantha Coccinea

Berries

Gastrointestinal, Mild cyanide producer

G

Geranium

Geranium Spp.

All parts

Dermatitis

German Ivy

Delairea odorata

Berries, leaves

Gastrointestinal, dermatitis

Glacier Ivy

Hedera helix

Berries, leaves

Gastrointestinal, dermatitis

Glory lily

Gloriosa Superba

All parts

Cardiovascular, gastrointestinal

Gold Dieffenbachia

Dieffenbachia picta

Sap and water that cuttings were in

Gastrointestinal

Golden chain

Laburnum Anagyroides

All parts

Gastrointestinal, neurological

Golden Pothos (potted ivy)

Epiprenum

aureum

All Parts

Stomatitis, glossitis

H

Hemp (see marijuana)

Cannabis Sativa

Henbane

Hyoscyamus Niger

All parts

Neurological

Heavenly blues (morning glory)

Ipomoea purpurea

seeds

Neurological, hallucinations, gastrointestinal

Holly

Ilex Aquifolium

Seeds, berries

Gastrointestinal, neurological

Honeysuckle

Ionicera periclymenum

Plants, berries

Gastrointestinal, neurological

Hydrangea

Hydrangea macrophylla, H. quercifoia, H. arborescens

All parts

Gastrointestinal, cyanide producer

Hyacinth

Hyacinth orientalis

Bulb

Gastrointestinal, dermamtitis

I

Ivy

Araliaceae, Glechoma hederacea

All parts

Muscular, neurological, gastrointestinal

Iris

Iris Spp.

Tubers

Gastrointestinal, muscular, dermatitis

J

Jessamine  (Day or night blooming)

Cestrum Diurnum, Cestrum Nocturnum

Berries, ripe and unripe

Gastrointestinal, neurological

Jack in the pulpit

Arisaema spp.

All parts

Stomatitis, glossitis, hallucinations

Japanese Wisteria

Wisteria floribunda

seeds

Gastrointestinal

Jimson weed

Datura stramonium

All parts

neurological

Jerusalem Cherry

Solanum pseudocapsicum

Immature growths

Gastrointestinal, dermatitis

K

King cup cactus

Echinocereus triglochidiatus

Whole mature plant

Gastrointestinal, stomatitis, glossitis

Kafir Lily

Clivia miniata

Bulbs

Gastrointestinal

Kansas Thistle (OR Texas Thistle, Mexican Thistle, Buffalobur)

Solanum rostratum

Leaves, Fruit

Neurological, Gastrointestinal

L

Lacy tree philodendron

Philodendron selloum

All parts

Gastrointestinal, dermatitis, stomatitis, glossitis

Larkspur

Delphinium elatum

Young plants, seeds

Gastrointestinal, neurological, cardiovascular, dermatitis, DEATH

Lantana

Lantana camara

Green berries, fruit

Cardiovascular, gastrointestinal, neurological, hepatic, renal

Lily of the valley

Convallaria majalis

All parts

Cardiovascular, gastrointestinal, Renal

Locust

Gleditsia

Bark, sprouts, leaves

Gastrointestinal, muscular

Lupine

Lupinus spp.

Seeds

Cardiac, Respiratory, Neurological

M

Matrimony Vine

Lycium barbarum

Leaves, stem, stalk

Gastrointestinal, neurological, cardiac, DEATH

Marijuana

Cannabis sativa

Leaves and flowers

Nuerological, hallucinations

May Apple

Podophyllum peltatum

Apple, roots, foliage

Gastrointestinal, neurological, eye sight

Milkweed

Asclepias syriaca

All parts

Dermatitis

Mistletoe

Phoradendron spp

Berries and leaves

Gastrointestinal, dermatitis, DEATH

Monk’s hood

Aconitum Napellus

All parts, root

Gastrointestinal, neurological, cardiovascular,

Moon Trumpet

(see jimson weed)

Datura stramonium

Morning Glory

(see heavenly blues)

Ipomoea purpurea

Mother-in-law plant (see dieffenbachia)

Sambucus Nigra

N

Nandina

Nandina domestica

Foliage, berries

Cyanide producer

Naked lady lily (see amaryllis)

Amaryllis,  Hippeastrum

Narcissus

Narcissus spp.

bulbs

Gastrointestinal, dermatitis

Needlepoint ivy

Hedera helix

Berries, leaves

Gastrointestinal, dermatitis

Nightshade (see Deadly nightshade)

Solanum Nigrum, Atropa belladonna

O

Oak tree

Quercus, Lithocarpus

Leaves, acorns

Gastrointestinal, renal in Horses

Oleander

Nerium oleander

All parts, water used for cuttings

Cardiovascular, gastrointestinal, DEATH

Onion (all types)

Allium aflatunense

All parts

Anemia, renal, hepatic

Ornamental pepper (see Deadly night shade)

Solanum Nigrum, Atropa belladonna

P

Paspalum

Paspalum laeve

Sap from seeds

Dermatitis

Peace Lily (also called closet plant)

Mauna Loa Supreme

All parts

Gastrointestinal, dermatitis

Peach

Prunus persica

Pit, leaves

Cyanide producer

Pencil Cactus

Euphorbia tirucalli

All parts

Hallucinations

Plum

Prunus domestica

Seeds

Cyanide producer

Poison Hemlock

Conium maculatum

All parts

Neurological, dermatitis

Poinsettia

Euphorbia pulcherrima

All parts

Gastrointestinal, dermatitis, BLINDNESS

Poison Ivy

Toxicodendron radicans

Leaves, Bark, fruit

Dermatitis

Poison Oak

Toxicodendron diversilobum

Leaves, Bark, fruit

Dermatitis

Poison Sumac

Toxicodendron vernix

Severe Dermatitis

Poisonous Primula

Primula Spp.

Leaves

Dermatitis, gastrointestinal

Poppy

Papaver spp.

Berries, stems, sap

Neurological, respiratory

Pothos (see Golden pothos)

Epiprenum

aureum

Potato

Solanum tuberosum

Green growth, sprouts

Gastrointestinal

Precatory bean

Abrus precatorius

seeds

Gastrointestinal

Primrose

Primula, Spp.

leaves

Gastrointestinal, dermatitis

Purple Flag Iris

Iris versicolor

bulbs

Gastrointestinal

Pyracantha (see Firethorn)

Pyracantha Coccinea

R

Ragwort

Senecio jacobaea

All parts

Renal, hepatic, DEATH *harmful to horses, cattle, dogs, humans

Rhododendron

Rhododendron Spp.

All parts

Gastrointestinal, respiratory, neurological

Rhubarb

Rheum Rhabarbarum

Leaves

Glossitis, stomatitis,  *large amounts can cause neurological problems and even DEATH

Rosary Pea (see castor bean)

Ricinus Communis

*contains ri