Poison ivy and poison oak
Toxicodendron radicans and Toxicodendron diversibba
Cashew (Anacardiacese) Family
Description: These two plants are quite similar in appearance and will often crossbreed to make a hybrid. Both have alternate, compound leaves with three leaflets. The leaves of poison ivy are smooth or serrated. Poison oak's leaves are lobed and resemble oak leaves. Poison ivy grows as a vine along the ground or climbs by red feeder roots. Poison oak grows like a bush. The greenish-white flowers are small and inconspicuous and are followed by waxy green berries that turn waxy white or yellow, then gray.
All parts, at all times of the year, can cause serious contact dermatitis.
Habitat and Distribution: Poison ivy and oak can be found in almost any habitat in North America.
All text and images from the U.S. Army Field Manual 3-05.70: Survival.
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