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