Toxicodendron rydbergii (Small ex Rydb.) Greene  
Family: Anacardiaceae
Rydberg's poison-ivy, western poison-ivy
[Rhus radicans var. rydbergii L., Rhus radicans var. vulgaris L., Rhus rydbergii Small ex Rydb. (pro parte), Rhus toxicodendron var. vulgaris L., Toxicodendron desertorum Lunell, Toxicodendron fothergilloides Lunell, Toxicodendron radicans var. rydbergii (L.) Kuntze]
Toxicodendron rydbergii image
Derek Anderson  
Etymology: Toxicodendron: means "poison tree"
Plants: erect, perennial, 1'-3' tall shrub with 1 to a few branches; stems woody; from colony-forming rhizomes
Leaves: alternate, stalked, usually near the top of the stem, shiny, smooth, 3 parted, the widely-oval leaflets with a pointed tip
Flowers: white, 5-parted; inflorescence a 4"-16" elongated, branched cluster (cyme) with usually less than 25 stalked flowers; blooms June-Aug.
Fruits: smooth, white to yellow berry
Habitat: full to partial sun; woods edges, openings, prairies
Hazardous: Careful, this plant is hazardous!
Conservation Status: Native - potentially invasive
Toxicodendron rydbergii image
Merel R. Black  
Toxicodendron rydbergii image
Joanne Kline  
Toxicodendron rydbergii image
Paul Drobot  
Toxicodendron rydbergii image
Merel R. Black  
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