The following is a fairly complete list of the more common poisonous plants. Now some of you may wonder why plants like skunk cabbage, choke cherry and even rhubarb are on this list. It is because these plants and some others on the list have parts that are poisonous or may need to be treated in some manner to neutralize the poisons. For instance, rhubarb leaves are poisonous, but you can eat the stalks. Choke cherry pits and leaves are poisonous, but the berry is not.
Some of the other plants shown on this list are medicinal plants and used correctly can treat many illnesses. An example would be foxglove from which digitalis is made.
|American False hellobore||Anemona|
|Bleeding Heart||Black Locust|
|Castor bean||Celadine poppy|
|Deadly nightshade||Death camas|
|Elephant Ear||European bittersweet|
|Iris||Jack in the pulpit|
|Jerusalem cherry||Jimson weed|
|Leafy spurge||Lily Flame|
|Marsh mariglod||Mayapple (except fruit)|
|Morning glory||Mountain laurel|
|Poison hemlock||Poison ivy|
|Poison milkweed||Poison oak|
|Rosary pea||Skunk cabbage|
|Star of Bethlehem||St Johnswort|
|Water hemlock||Wild black cherry|
Many of these poisonous plants may have regional names which I am not familiar. I strongly suggest that you find plant reference books that cover the area in which you live or plan to spent time in. I have found some excellent ones that are written about the Sierra Nevada Mountains in which I live. Two excellent books that are fairly comprehensive nationwide are Bradford Angier’s Field Guide to Medicinal Wild Plants and his Field Guide to Edible Wild Plants, these have both been revised by David K Foster. The field guides only cover wild plants and not ornamental plants.
Anytime you are considering eating wild or ornamental plants be sure of your identification. Many of your local colleges have classes on this subject and I would encourage you to take one.