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{{Taxobox
| color = lightgreen
| name = Western Poison-Ivy
| regnum = [[Plant]]ae
| divisio = [[Flowering plant|Magnoliophyta]]
| classis = [[Magnoliopsida]]
| ordo = [[Sapindales]]
| familia = [[Anacardiaceae]]
| genus = ''[[Toxicodendron]]''
| species = '''''T. rydbergii'''''
| binomial = ''Toxicodendron rydbergii''
| binomial_authority = ([[John Kunkel Small|Small]] ex [[Per Axel Rydberg|Rydb.]]) [[Edward Lee Greene|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 [[forest|forests]], and other wooded areas, usually near [[stream|streams]] and [[river|rivers]].
===Caution===
All parts of this plant contain [[Urushiol]], which can cause severe [[dermatitis]] in some individuals.
[[Category:Sapindales]]
[[Category:Poisonous plants]]
| color = lightgreen
| name = Western Poison-Ivy
| regnum = [[Plant]]ae
| divisio = [[Flowering plant|Magnoliophyta]]
| classis = [[Magnoliopsida]]
| ordo = [[Sapindales]]
| familia = [[Anacardiaceae]]
| genus = ''[[Toxicodendron]]''
| species = '''''T. rydbergii'''''
| binomial = ''Toxicodendron rydbergii''
| binomial_authority = ([[John Kunkel Small|Small]] ex [[Per Axel Rydberg|Rydb.]]) [[Edward Lee Greene|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 [[forest|forests]], and other wooded areas, usually near [[stream|streams]] and [[river|rivers]].
===Caution===
All parts of this plant contain [[Urushiol]], which can cause severe [[dermatitis]] in some individuals.
[[Category:Sapindales]]
[[Category:Poisonous plants]]