In the Case of suspected plant poisoning please call:

Ohio Poison Hotline

800-222-1222

Toxicity Class (third column in table below)

  1. Major Toxicity: These plants may cause serious illness or death. If ingested, immediately call the Poison Control Center or your doctor.
  2. Minor Toxicity: Ingestion of these plants may cause minor illnesses such as vomiting or diarrhea. If ingested, call the Poison Control Center or your doctor.
  3. Oxalates: The juice or sap of these plants contains oxalate crystals. These needle-shaped crystals can irritate the skin, mouth, tongue, and throat, resulting in throat swelling, breathing difficulties, burning pain, and stomach upset. Call the Poison Control Center or your doctor if any of these symptoms appear following ingestion of plants.
  4. Dermatitis: The juice, sap, or thorns of these plants may cause a skin rash or irritation. Wash the affected area of skin with soap and water as soon as possible after contact. The rashes may be very serious and painful. Call the Poison Control Center or your doctor if symptoms appear following contact with the plants.
  5. Animal toxicity: Pets, especially cats and dogs, frequently ingest plants. If a plant is known to be hazardous to humans, it will probably be toxic for animals as well.

Common Name

Scientific Name

Toxicity Class

Achillea

Achillea millefolium

2,4

Aconite

Aconitum spp.

1

African boxwood

Myrsine africana

2

African lily

Agapanthus spp.

2,4

Agapanthus

Agapanthus spp.

2,4

Agave

Agave spp.

2,3,4

Aglaonema

Aglaonema spp.

3,4

Ailanthus

Ailanthus altissima

2,4

Alder

Alnus spp.

4

Allium

Allium spp.

2

Almond (seeds)

Prunus spp.

1

Alocasia

Alocasia spp.

3,4

Alstroemeria

Alstroemeria spp.

2,4

Amaryllis

Amaryllis belladonna

2,4

Amaryllis

Hippeastrum spp.

2

Anemone

Anemone spp.

2,4

Angel's trumpet

Brugmansia spp.

1

Anthurium

Anthurium spp.

3,4

Apple (seeds)

Malus spp.

1

Apricot (seeds)

Prunus spp.

1

Aralia, Ming

Polyscias spp.

2,4

Arborvitae

Thuja spp.

2,4

Arrowhead plant

Syngonium podophyllum

3

Arum

Arum spp.

3,4

Ash

Fraxinus spp.

4

Asparagus, Garden

Asparagus officinalis

4

Asparagus, Sprenger

Asparagus densiflorus

4

Aster

Aster spp.

4

Aucuba, Japanese

Aucuba japonica

2

Autumn crocus

Colchicum autumnale

1,4

Azalea

Rhododendron spp.

1

Baby's breath

Gypsophila paniculata

4

Balsam fir

Abies balsamea

4

Barberry

Berberis spp.

2,4

Begonia

Begonia spp. (some spp.)

2,3

Belladonna

Atropa belladonna

1

Belladonna lily

Amaryllis belladonna

2,4

Bermudagrass

Cynodon dactylon

4

Birch tree

Betula spp.

2,4

Bird-of-paradise shrub

Caesalpina gilliesii

2

Bishop's weed

Ammi majus

4

Bittersweet

Celastrus scandens

2

Black calla

Arum spp.

3,4

Black cherry (seeds)

Prunus spp.

1

Black henbane

Hyoscyamus niger

1

Black locust (seeds)

Robinia pseudoacacia

1

Black nightshade

Solanum spp.

1

Blanket flower

Gaillardia spp.

4

Bleeding heart

Dicentra spp.

4

Blood lily

Haemanthus spp.

2,4

Blue gum

Eucalyptus spp.

2,4

Boston ivy

Parthenocissus spp.

3,4

Bottle tree

Brachychiton populneus

4

Bougainvillea (thorns)

Bougainvillea spp.

4

Boxwood

Buxus sempervirens

2,4

Brazilian pepper tree

Schinus terebinthifolius

2,4

Broom

Cytisus spp.

2

Buckeye

Aesculus spp.

2

Buckthorn

Rhamnus spp.

2,4

Burning bush

Euonymus spp.

2

Bushman's poison

Acokanthera spp.

1

Buttercup

Ranunculus spp.

2,4

Butterfly weed

Asclepias spp.

2,4

Cactus (thorns and sap)

Cactus spp.

4

Cajeput tree

Melaleuca quinquenervia

4

Caladium

Caladium bicolor

3,4

California bay

Umbellularia californica

4

California buckeye

Aesculus spp.

2

California laurel

Umbellularia californica

4

California pepper tree

Schinus molle

4

Calla, Black

Arum spp.

3,4

Calla lily

Zantedeschia aethiopica

3,4

Camphor tree

Cinnamomum camphora

2

Candytuft, Evergreen

Iberis sempervirens

4

Cape plumbago

Plumbago auriculata

4

Cardinal flower

Lobelia spp.

1,4

Carnation

Dianthus caryophyllus

2,4

Carolina jessamine

Gelsemium sempervirens

1,4

Carolina laurel cherry

Prunus caroliniana

1

Castor bean

Ricinus communis

1

Century plant

Agave spp.

2,3,4

Cestrum

Cestrum spp.

1

Chamomile

Chamaemelum nobile

4

Checkered lily

Fritillaria meleagris

1

Chenille plant

Acalypha spp.

2,4

Cherry (seeds)

Prunus spp.

1

Chinaberry

Melia azedarach

1

Chinese evergreen

Aglaonema spp.

3,4

Chinese lantern

Physalis spp.

1

Chinese tallow tree

Sapium sebiferum

4

Chokecherry

Prunus virginiana

1

Christmas rose

Helleborus spp.

1,4

Chrysanthemum

Chrysanthemum spp.

2,4

Cineraria

Senecio hybridus

2,4

Clematis

Clematis spp.

2,4

Climbing lily

Gloriosa spp.

1

Clivia

Clivia spp.

2,4

Coast redwood

Sequoia sempervirens

2,4

Coffee plant

Coffea arabica

2

Coffeeberry

Rhamnus spp.

2,4

Columbine

Aquilegia spp.

2

Copperleaf

Acalypha spp.

2,4

Coral plant

Jatropha spp.

2,4

Coral tree

Erythrina spp.

1

Coralberry

Symphoricarpos spp.

2

Cotoneaster

Cotoneaster spp.

2

Crabapple (seeds)

Malus spp.

1

Creeping Charlie

Glechoma hederacea

2

Crinum lily

Crinum spp.

2,4

Crocus, Autumn

Colchicum autumnale

1,4

Croton

Codiaeum variegatum

2,4

Crown of thorns

Euphorbia spp.

2,4

Cyclamen

Cyclamen spp.

2,4

Daffodil (bulb)

Narcissus spp.

2,4

Daisy

Chrysanthemum spp.

2,4

Daphne

Daphne spp.

1

Deadly nightshade

Atropa belladonna

1

Deadly nightshade

Hyoscyamus niger

1

Deadly nightshade

Solanum spp.

1

Death camas

Zigadenus spp.

1

Delphinium

Delphinium spp.

1

Desert bluebells

Phacelia spp.

4

Dichondra

Dichondra micrantha

4

Dieffenbachia

Dieffenbachia spp.

3

Dogwood

Cornus spp.

4

Dumb cane

Dieffenbachia spp.

3

Dusty miller

Senecio spp. (some spp.)

2,4

Dutch iris

Iris spp.

2,4

Echium

Echium vulgare

1,4

Elderberry (ripe fruit is nontoxic)

Sambucus spp.

1

Elephant's ear

Alocasia spp.

3,4

Elephant's ear

Colocasia spp.

3,4

Elephant's ear

Xanthosoma spp.

3,4

Elm tree

Ulmus spp.

4

English daisy

Bellis perennis

4

English ivy

Hedera spp.

2,4

English laurel

Prunus laurocerasus

1

English yew (seeds)

Taxus baccata

1

Eucalyptus

Eucalyptus spp.

2,4

Euonymus

Euonymus spp.

2

Euphorbia

Euphorbia spp.

2,4

European mistletoe

Viscum album

1

Evergreen candytuft

Iberis sempervirens

4

False heather

Cuphea hyssopifolia

4

False Queen Anne's lace

Ammi majus

4

Fescue (grass)

Festuca spp.

4

Fig

Ficus carica and Ficus spp.

4

Fig, Weeping

Ficus spp.

4

Fig, Fiddle-leaf

Ficus lyrata

4

Fiddle-leaf fig

Ficus lyrata

4

Fir, Balsam

Abies balsamea

4

Firetail

Acalypha spp.

2,4

Firethorn

Pyracantha spp.

2,4

Fishtail palm

Caryota spp.

3,4

Flax

Linum usitatissimum

4

Fleabane

Erigeron spp.

4

Flowering tobacco

Nicotiana glauca

1

Four-o'clock

Mirabilis jalapa

2,4

Foxglove

Digitalis purpurea

1

Frangipani

Plumeria rubra

4

Garden asparagus

Asparagus officinalis

4

Ginkgo

Ginkgo biloba

4

Gladiolus

Gladiolus spp.

2,4

Glory lily

Gloriosa spp.

1

Goldenchain tree

Laburnum anagyroides

2

Gopher plant

Euphorbia spp.

2,4

Grape ivy

Cissus rhombifolia

4

Grevillea

Grevillea spp.

4

Groundcherry

Physalis spp.

1

Ground ivy

Glechoma hederacea

2

Guernsey lily

Nerine spp.

2,4

Gum, Blue

Eucalyptus spp.

2,4

Heart leaf

Philodendron spp.

3,4

Heather

Calluna vulgaris

1

Heliotrope

Heliotropum arborescens

1

Hellebore

Helleborus spp.

1,4

Hemlock, Poison

Conium maculatum

1

Hemlock, Water

Cicuta spp.

1

Henbane, Black

Hyoscyamus niger

1

Holly (berries)

Ilex spp.

2

Hollyhock

Alcea rosea

4

Honey bush

Melianthus spp.

1

Horsechestnut

Aesculus spp.

2

Hyacinth

Hyacinthus orientalis

2,4

Hydrangea

Hydrangea spp.

1,4

Iceland poppy

Papaver nudicaule

3,4

Indian currant

Symphoricarpos spp.

2

Indian turnip

Arisaema triphyllum

3,4

Iris

Iris spp.

2,4

Italian arum

Arum spp.

3,4

Ivy

Hedera spp.

2,4

Ivy, Boston

Parthenocissus spp.

3,4

Ivy, English

Hedera spp.

2,4

Ivy, Grape

Cissus rhombifolia

4

Ivy, Ground

Glechoma hederacea

2

Jack-in-the-pulpit

Arisaema triphyllum

3,4

Jade plant

Crassula argentea

2,4

Japanese aucuba

Aucuba japonica

2

Japanese pieris

Pieris japonica

1

Japanese yew (seeds)

Taxus spp.

1

Jatropha

Jatropha spp.

2,4

Jequirity bean

Abrus precatorius

1

Jerusalem cherry

Solanum pseudocapsicum

1

Jessamine

Cestrum spp.

1

Jessamine, Carolina

Gelsemium sempervirens

1,4

Jimson weed

Brugmansia spp.

1

Jonquil (bulb)

Narcissus spp.

2,4

Juniper

Juniperus spp.

2

Kaffir lily

Clivia spp.

2,4

Laburnum

Laburnum anagyroides

2

Lady slipper orchid

Cypripedium spp.

4

Lantana

Lantana camara

1

Larkspur

Delphinium spp.

1

Laurel, California

Umbellularia californica

4

Laurel cherry

Prunus caroliniana

1

Laurel, English

Prunus laurocerasus

1

Laurel, Mountain

Kalmia latifolia

2

Laurel, New Zealand

Corynocarpus laevigata

2

Lenten rose

Helleborus spp.

1,4

Ligustrum

Ligustrum spp.

2,4

Lily

Lilium spp. (some spp.)

2,4

Lily, African

Agapanthus spp.

2,4

Lily, Belladonna

Amaryllis belladonna

2,4

Lily, Blood

Haemanthus spp.

2,4

Lily, Calla

Zantedeschia aethiopica

3,4

Lily, Checkered

Fritillaria meleagris

1

Lily, Climbing

Gloriosa spp.

1

Lily, Crinum

Crinum spp.

2,4

Lily, Glory

Gloriosa spp.

1

Lily, Guernsey

Nerine spp.

2,4

Lily, Kaffir

Clivia spp.

2,4

Lily, Peruvian

Alstroemeria spp.

2,4

Lily, Spider

Lycoris spp.

2

Lily, Spider

Hymenocallis spp.

2,4

Lily-of-the-Nile

Agapanthus spp.

2,4

Lily-of-the-valley

Convallaria majalis

1,4

Lobelia

Lobelia spp.

1,4

Locust, Black (seeds)

Robinia pseudoacacia

1

Loquat (seeds)

Eriobotrya japonica

1

Love-in-a-mist

Nigella damascena

2

Love-lies-bleeding

Amaranthus caudatus

1

Lupine

Lupinus spp.

1

Maidenhair tree

Ginkgo biloba

4

Maple

Acer spp.

4

Marguerite daisy

Chrysanthemum spp.

2,4

Marigold

Tagetes spp.

4

Marsh marigold

Caltha palustris

2

May apple

Podophyllum peltatum

1

Meadow saffron

Colchicum autumnale

1,4

Milkweed

Asclepias spp.

2,4

Ming aralia

Polyscias spp.

2,4

Mistletoe

Phoradendron spp.

2,4

Mistletoe, European

Viscum album

1

Monkshood

Aconitum spp.

1

Morning glory (seeds)

Ipomoea spp.

1

Moses-in-the-cradle

Rhoeo spathacea

4

Mountain laurel

Kalmia latifolia

2

Myoporum

Myoporum laetum

1

Myrtle

Myrtus communis

2

Myrtle

Vinca spp.

1

Naked lady

Amaryllis belladonna

2,4

Narcissus (bulb)

Narcissus spp.

2,4

Natal plum

Carissa macrocarpa

2

Nectarine (seeds)

Prunus spp.

1

Nephthytis

Syngonium podophyllum

3

Nerine

Nerine spp.

2,4

Nettles, Stinging

Urtica spp.

4

New Zealand laurel

Corynocarpus laevigata

2

Night-blooming jessamine

Cestrum spp.

1

Nightshade, Deadly

Atropa belladonna

1

Nightshade, Deadly

Hyoscyamus niger

1

Nightshade, Black or Deadly

Solanum spp.

1

Oak tree (acorns)

Quercus spp.

2,4

Oleander

Nerium oleander

1,4

Oleander, Yellow

Thevetia peruviana

1,4

Onion, Wild

Allium spp.

2

Ornithogalum

Ornithogalum spp.

1

Pampas grass

Cortaderia selloana

1

Pansy (seeds)

Viola spp.

2

Pasque flower

Anemone spp.

2,4

Peach (seeds)

Prunus spp.

1

Pear (seeds)

Pyrus spp.

1

Pencil tree

Euphorbia spp.

2,4

Pepper tree, Brazilian

Schinus terebinthifolius

2,4

Pepper tree, California

Schinus molle

4

Periwinkle

Vinca spp.

1

Peruvian lily

Alstroemeria spp.

2,4

Peruvian scilla

Scilla spp.

1

Philodendron

Philodendron spp.

3,4

Philodendron, Split-leaf

Monstera deliciosa

3,4

Pieris, Japanese

Pieris japonica

1

Pineapple

Ananas comosus

4

Pink

Dianthus spp.

2,4

Pittosporum

Pittosporum spp.

1

Plum (seeds)

Prunus spp.

1

Plumbago, Cape

Plumbago auriculata

4

Plumeria

Plumeria rubra

4

Poinciana

Caesalpina gilliesii

2

Poinsettia

Euphorbia spp.

2,4

Poison hemlock

Conium maculatum

1

Poison oak

Toxicodendron diversilobum

4

Pokeweed

Phytolacca americana

2

Poppy

Papaver spp.

2,4

Poppy, Iceland

Papaver nudicaule

3,4

Potato plant (green parts)

Solanum tuberosum

1

Pothos

Epipremnum aureum

3,4

Pregnant onion

Ornithogalum spp.

1

Primrose

Primula spp.

4

Primula

Primula spp.

4

Privet

Ligustrum spp.

2,4

Pyracantha

Pyracantha spp.

2,4

Queen Anne's lace

Daucus carota

4

Queen Anne's lace, False

Ammi majus

4

Ranunculus

Ranunculus spp.

2,4

Redwood, Coast

Sequoia sempervirens

2,4

Rhododendron

Rhododendron spp.

1

Rhubarb (leaves)

Rheum rhabarbarum

3

Rosary bean

Abrus precatorius

1

Rosary pea

Abrus precatorius

1

Rubber plant

Ficus elastica

4

Rue

Ruta graveolens

4

Sagebrush

Artemisia spp.

4

Sago palm

Cycas revoluta

2

Scarlet pimpernel

Anagallis arvensis

2,4

Schefflera

Schefflera actinophylla

2,4

Scotch broom

Cytisus spp.

2

Shasta daisy

Chrysanthemum maximum

2,4

Silk oak

Grevillea spp.

4

Skunk cabbage

Veratrum spp.

2

Smoke bush

Cotinus coggygria

4

Snake plant

Sansevieria spp.

2,4

Snakeshead

Fritillaria meleagris

1

Snow-on-the-mountain

Euphorbia spp.

2,4

Snowberry

Symphoricarpos spp.

2

Snowdrop

Galanthus spp.

2,4

Snowflake

Leucojum spp.

2,4

Spathiphyllum

Spathiphyllum spp.

3,4

Spider lily

Lycoris spp.

2

Spider lily

Hymenocallis spp.

2,4

Split-leaf philodendron

Monstera deliciosa

3,4

Sprenger asparagus

Asparagus densiflorus

4

Squill

Scilla spp.

1

St. Johnswort

Hypericum calycinum

1,4

Star-of-Bethelehem

Ornithogalum spp.

1

Stinging nettles

Urtica spp.

4

String of beads

Senecio spp. (some spp.)

2,4

Sweet pea (seeds)

Lathyrus odoratus

2

Sweet William

Dianthus barbatus

2,4

Tansy

Tanacetum spp.

4

Taro

Colocasia esculenta

3,4

Tassel flower

Amaranthus caudatus

1

Tomato (non-fruit parts)

Lycopersicon esculentum

1,4

Toyon

Heteromeles arbutifolia

1

Tree-of-heaven

Ailanthus altissima

2,4

Tree tobacco

Nicotiana glauca

1

Trumpet creeper

Campsis radicans

4

Trumpet vine

Campsis radicans

4

Tuberose

Polianthes tuberosa

2

Tulip (bulb)

Tulipa spp.

2,4

Umbrella plant

Cyperus alternifolius

2

Umbrella tree

Schefflera actinophylla

2,4

Vinca

Vinca spp.

1

Violet (seeds)

Viola spp.

2

Virginia creeper

Parthenocissus spp.

3,4

Walnut

Juglans spp.

4

Wandering jew

Tradescantia spp.

4

Water hemlock

Cicuta spp.

1

Weeping fig

Ficus spp.

4

Wild onion

Allium spp.

2

Windflower

Anemone spp.

2,4

Wintersweet

Acokanthera spp.

1

Wisteria

Wisteria spp.

2

Wormwood

Artemisia spp.

4

Yarrow

Achillea millefolium

2,4

Yew, English (seeds)

Taxus baccata

1

Yew, Japanese (seeds)

Taxus spp.

1

Yew pine

Podocarpus macrophyllus

2

Plant lists in this database compiled by:

Ann King Filmer, Ph.D.
Director of Communications
College of Agricultural and Environmental Sciences, Dean's Office 

 

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