Family: Anacardiaceae
Rydberg's poison-ivy, western poison-ivy
[Rhus radicans var. rydbergii L., more...]
Derek Anderson
Merel R. Black
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
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
Floristic Rating: Coefficient of Conservatism = 2, Wetland Indicator = FAC Atlas of the Wisconsin Prairie and Savanna Flora: by T.S. Cochrane & H.H. Iltis: habitat, distribution infomation / flowering and fruiting times USDA Plants Database: Federal Distribution and detailed information including photos University of Wisconsin - Green Bay: Shrubs: Photos, descriptions, information
Merel R. Black
Joanne Kline
Paul Drobot
Merel R. Black
Matthew L. Wagner
Joanne Kline
Aaron_Carlson
Robert W. Freckmann
Aaron_Carlson
Paul Drobot
Robert R. Kowal
Aaron_Carlson
Aaron_Carlson
Aaron_Carlson
Aaron_Carlson
Matthew L. Wagner
Aaron_Carlson
Aaron_Carlson
Matthew L. Wagner
Botanical Illustration
Robert W. Freckmann
Botanical Illustration
