Hemp Dogbane: Apocynum cannabinum
Description: a perennial that grows 1-2 meters tall. The leaves, that turn yellow in the fall, grow on opposite sides of the stems. The smooth-edged leaves are hairy on the lower surface. Flowers are greenish-white that develop into two long pods containing numerous seed with tufts of silky white hairs at their ends. The reddish stems contain a milky sap.