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Toxicodendron rydbergii (Small ex Rydb.) Greene
Western poison ivy
Synonym(s): Rhus radicans var. rydbergii, Rhus radicans var. vulgaris, Rhus toxicodendron var. vulgaris, Toxicodendron desertorum, Toxicodendron radicans var. rydbergii
USDA Symbol: TORY
USDA Native Status: L48 (N), CAN (N)
Western Poison Ivy is a member of the cashew family (family Anacardiaceae) which includes trees, shrubs, and few woody vines with resinous sap often in bark and other parts; in a few species the resin or volatile oil is caustic and poisonous to the skin.
Plant CharacteristicsDuration: Perennial Habit: Shrub Autumn Foliage:
Bloom InformationBloom Color: White , Yellow
, WY Canada: AB
Growing ConditionsLight Requirement: Sun , Part Shade , Shade
National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
Record Last Modified: 2007-01-01
Research By: TWC Staff