Harmful Plants
The following list of harmful plants comes from an article published in KOI USA several years ago
Plant |
Poisonous Part |
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| Amaryllis- Bulbs | Jerusalem Cherry- Berries | ||||||
| Azalea- Leaves |
Jimsonweed- Leaves, seeds
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| Balsam Pear- Seeds, outer rind of fruit |
Juniper ( J. virginiana)- Needles, stems, berries
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| Baneberry- Berries, roots |
Lantana- Immature berries
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| Bird of Paradise- Seeds | Larkspur- All parts | ||||||
| Black Locust- Bark, sprouts, foliage |
Laurel- All parts
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| Blue/Green Algae- Some forms toxic |
Lily of the Valley- All parts, including water
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| Boxwood- Leaves, stems |
Lobelia- All parts
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| Buckthorn- Fruit, bark |
Locoweed- All parts
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| Buttercup- Sap, bulbs | Lords and Ladies- All parts | ||||||
| Caladium- Leaves |
Marijuana- Leaves
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| Calla Lily- Leaves |
Mayapple- All parts, except fruit
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| Castor Bean (Castor Oil)- Beans, Leaves |
Mescal Bean- Seeds
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| Challice Vine- All parts |
Mistletoe- Berries
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| Cherry Tree- Bark, twigs, leaves, pits | Mock Orange- Fruit | ||||||
| Christmas Candle- Sap |
Monkshood- Leaves, roots
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| Coral Plant- Seeds |
Morning Glory- All parts
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| Daffodil- Bulbs |
Narcissus- Bulbs
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| Daphne- Berries |
Nightshades (All)- Berries, leaves
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| Datura- Berries | Oak- Acorns, foliage | ||||||
| Deadly Amanita- All parts |
Oleander- Leaves, branches, nectar of blossoms
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| Death Camas- All parts |
Philodendron- Leaves, stem
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| Deiffenbachia- Leaves |
Pikeweed- Leaves, roots,
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| Delphinium- All parts |
immature berries
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| Eggplant- All parts but fruit | Poinsettia- Leaves, flowers | ||||||
| Elephant’s Ear (Taro)- Leaves, stem |
Poison Ivy- Sap
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| English Ivy- Berries, leaves |
Poison Oak- Sap
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| False Henbane- All parts |
Potato- Eyes and new shoots
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| Foxglove- Leaves, seeds |
Privet- All parts, including berries
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Golden Chain- All parts, especially seed
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Rhododendron- All parts | ||||||
| Hemlock, Poison- All parts, especially roots and seeds |
Rhubarb- Leaves
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| Hemlock, Water- All parts, especially roots and seeds |
Rosary Peas- Seeds
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| Henbane- Seeds |
Skunk Cabbage- All parts
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| Holly- Berries | Snow on Mountain- All parts | ||||||
| Horse Chestnut- Nuts, twigs |
Snowdrop- All parts, especially buds
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| Hyacinth- Bulbs |
Sweet Pea- Seeds and fruit
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| Hydrangea- Flower bud |
Tobacco- Leaves
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| Indian Turnip (jack-in-the-pulpit)- All parts |
Virginia Creeper- Sap
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| Iris (Blue Flag)- Bulbs |
Wisteria- All parts
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| Java Bean (Lima)- Uncooked bean |
Yam Bean- Roots, immature pods
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Yew (American, English, Japanese)- Needles, seeds
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