Anacardiaceae
Western poison ivy
Toxicodendron rydbergii
- Family
- Anacardiaceae
- Genus
- Toxicodendron
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Common names
By language (1)
- English
- Western poison ivy
Synonyms
- Rhus radicans subsp. rydbergii (Small ex Rydb.) McNeill
- Rhus radicans var. rydbergii (Small ex Rydb.) Rehder
- Rhus radicans var. vulgaris (Michx.) DC.
- Rhus rydbergii Small ex Rydb.
- Rhus toxicodendron var. rydbergii (Small ex Rydb.) Garrett
- Rhus toxicodendron var. vulgaris Michx.
- Toxicodendron desertorum Lunell
- Toxicodendron fothergilloides Lunell
- Toxicodendron longipes Greene
- Toxicodendron macrocarpum Greene
- Toxicodendron pumilum Greene
- Toxicodendron punctatum Greene
- Toxicodendron radicans subsp. rydbergii (Small ex Rydb.) Á.Löve & D.Löve
- Toxicodendron radicans var. rydbergii (Small ex Rydb.) Erskine
- Toxicodendron rufescens Greene
Characteristics
- Growth habit
- Forb/herb, Shrub, Subshrub, Vine
- Lifespan
- Perennial
- In the US and Canada
- Canada: native, Lower 48 states: native
Photos
Photo: Whitney Cranshaw, Colorado State University, United States, Bugwood.org, CC BY 3.0, from Wikimedia Commons 
Photo: Joshua Mayer, CC BY-SA 2.0, from Wikimedia Commons 
Photo: Joshua Mayer, CC BY-SA 2.0, from Wikimedia Commons 
Photo: jillllybean, CC BY-SA 2.0, from Wikimedia Commons 
Photo: Robert Flogaus-Faust, CC BY 4.0, from Wikimedia Commons 
Photo: Robert Flogaus-Faust, CC BY 4.0, from Wikimedia Commons 
Photo: Ryan Hodnett, CC BY-SA 4.0, from Wikimedia Commons
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- Toxicodendron orientaleAnacardiaceae
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Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.