Western Dogbane
Apocynum X floribundum
Synonyms: Apocynum medium, Apocynum medium var. floribundum, Apocynum medium var. lividum, Apocynum medium var. medium, Apocynum medium var. vestitum

Western dogbane as seen along the Little Spokane River downstream of the Painted Rocks.........June 19, 2009.
Paul Slichter