"Apocynum cannabinum" grows up to tall. Plants of the genus "Apocynum", including "Apocynum cannabinum" and "Apocynum venetum", contain cymarin. "Apocynum cannabinum" grows in open wooded areas, ditches, and hillsides. "Apocynum cannabinum" was used as a source of fiber by Native Americans. Growing in many areas, Indian hemp ("Apocynum cannabinum") was harvested and dried before maturity. The Klamath use Apocynum cannabinum as a fiber and eat the roots of Lomatium canbyi. "Apocynum cannabinum" is a phytoremediation plant, a hyperaccumulator used to sequester lead in its biomass.