Western Poison-ivy

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Plant Info
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Scientific classification
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[[{{{diversity_link}}}|Diversity]]
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Binomial name
Toxicodendron rydbergii (Small ex Rydb.) Greene
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Type Species
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Synonyms
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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.