Toxicodendron rydbergii (Small ex Rydb.) Greene   (redirected from: Toxicodendron radicans var. rydbergii)
Family: Anacardiaceae
western poison ivy
[Rhus radicans var. rydbergii (Small ex Rydb.) Rehd.,  more]
Toxicodendron rydbergii image
Max Licher  
PLANT: Subshrubs or shrubs spreading and rhizomatous, to 3 m tall. LEAVES: with glabrous petioles much longer than terminal leaflet, to 17 cm long; leaflets broadly obovate, 1-1.5 times as long as broad; margins crenate to serrate, 2n = 30. NOTES: Moist but often sunny sites along canyons and at seeps and springs, from the Sonoran Desert to mixed conifer forest; all AZ cos. except Pima, Pinal, Santa Cruz, and Yuma; 455-2575 m (1500-8500 ft); Apr-Jun; across s Canada and n US (e of the Cascades), s through Rocky Mountains and Great Plains to AZ, NM, and w TX.
Toxicodendron rydbergii image
Max Licher  
Toxicodendron rydbergii image
Max Licher  
Toxicodendron rydbergii image
Max Licher  
Toxicodendron rydbergii image
L.R. Landrum  
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