Western Poison-ivy
| Western Poison-Ivy | ||||||||||||||
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| Toxicodendron rydbergii (Small ex Rydb.) Greene | ||||||||||||||
Description
Western Poison-Ivy (Toxicodendron rydbergii or Rhus rydbergii) is a shrub that can grow to 2 m (6 ft) tall. The leaves are trifoliate and alternate. The leaflets are variable in size and shape, and are usually 15 cm (6 in) long, turning yellow or orange in autumn. The fruits are small, round, and yellowish.
Distribution
This species is native to most of the United States except the Pacific states.
Habitat
Western Poison-Ivy can be found growing in forests, and other wooded areas, usually near streams and rivers.
Caution
All parts of this plant contain Urushiol, which can cause severe dermatitis in some individuals.