Plants that Poison

         
House Plants
 
Plant   Toxic Part   Symptoms
 
Hyacinth, Narcissus, Daffodil   Bulbs   Nausea, Vomiting, Diarrhea
 
Oleander   All Parts   Affects the heart, produces severe digestion upset
 
Dieffenbachia (Dumb Cane) & Philodendron   All Parts   Intense burning and irritation of the mouth and tongue. Base of tongue may swell enough to block the air passage of the throat.
 
Rosary Pea, Castor Bean   Seeds   Burning sensation in mouth and throat, nausea, vomiting,diarrhea,and excessive thirst. Can cause convulsions and uremia
 
Poinsettia   Leaves   Not as toxic as originally stated
 
Mistletoe   All Parts   Mild intestinal irritation and diarrhea

 
Flower Garden Plants
 
Larkspur   Young plant, Seeds   Digestive upset, nervous excitement, depression
 
Monkshood   Fleshy Roots   Digestive upset, nervous excitement
 
Autumn Crocus, Star of Bethlehem   Bulbs   Vomiting and nervous excitement
 
Lily of the Valley   Leaves, Flowers   Irregular heart beat and pulse, usually accompanied by digestive upset and mental confusion
 
Lily   Leaves, Flowers, Pollen   Kidney failure in cats if any part of plant is ingested
 
Iris   Underground Stems   Produces nausea, abdominal pain and vomiting
 
Foxglove   Leaves   One of the sources of the drug digitalis, used to stimulate the heart. In large amounts, the active principals cause digestive upset, mental confusion and dangerous irregular heartbeat and pulse
 
Bleeding Heart   Foliage, Roots   May cause convulsions and difficult breathing when eaten in large quantities
 
Sweet Pea   Seeds   If eaten in large quantities, can produce paralytic syndrome
 

Vegetable Garden Plants
 
Rhubarb   Leaf Blade   Large amounts of raw or cooked leaves can cause convulsions, coma
 
Potato   Sprouts, Foliage   Digestive Upset Green Potato Skin
 
Tomato   Leaves   Cardiac Depression
 

Ornamental Plants
 
Daphne   All Parts, especially the berries   Burning sensation in mouth and throat, can cause gastro-intestinal irritation, internal bleeding and bloody diarrhea
 
Wisteria   Seeds, Pods   Mild to severe digestive upset
 
Golden Chain   Bean-like capsules where seeds are suspended   Excitement, staggering, convulsions and coma
 
Laurels, Rhododendron, Azaleas   All Parts   Produces nausea and vomiting, depression difficult breathing, prostration and coma
 
Yew   Berries, Foliage   Diarrhea, trembling, muscular weakness, difficult breathing. Rapid collapse can occur if eaten in quantity
 
Magnolia   Flower   Headache and depression
 

Trees and Shrubs
 
Wild and Cultivated Cherry   Twigs and Foliage   Contains a compound that releases cyanide when eaten. Gasping, excitement, and prostration are common symptoms that often appear in minutes
 
Oaks   Foliage, Acorns   Affects the kidney gradually. Symptoms appear only after several days or weeks. Take a large amount for poisoning
 
Elderberry   Shoots,Leaves,Bark   Children have been poisoned by using pieces of the pithy stems for blowguns. Nausea and digestive upset
 
Black Locust   Bark,Sprouts,Foliage   Children have suffered nausea,weakness and depression after chewing the bark and seeds
 
Holly   Berries   Vomiting and diarrhea may occur depending on types of holly and its maturation
 

Wild Plants
 
Mayapple   Apple, Foliage, Roots   Contains at least 16 active toxic principals, primarily in the roots. Children often eat the apple with no ill effects but several apples may cause diarrhea
 
Skunk Cabbage   Leaves, Rootstalk   Burning and swelling of mouth, tongue and throat
 
Water Hemlock   All Parts, especially the tubers   Diarrhea, violent and painful convulsions
 
Buttercups   All parts   Irritant juices may severely irritate the digestive system
 
Nightshade   All Parts, especially the unripe berry   American nightshade may lead to intense digestive disturbances while English deadly nightshade strikes the nervous system
 
Poison Hemlock   All Parts   The tuber resembles a large wild carrot. Nausea vomiting and convulsions may occur
 
Jimson Weed (Thorn Apple)   All Parts   Abnormal thirst, distort sight, delirium, incoherence and coma
 

 

 

 

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