Dogbane, a genus of tough, perennial herbs. There are about 20 species, all with bitter, milky juice. Spreading dogbane, or honeybloom, grows in the woodlands of North America. It bears clusters of pink, bell-shaped flowers on fibrous stems up to four feet (1.2 m) tall. The bark of the roots yields cymarin, a substance used to make certain medicines. Indian, or Canada, hemp is a taller plant with greenish-white flowers. It grows in the eastern United States and Canada. The tough, stringy bark of the dogbane was used by Indians to make nets.
Dogbane is of the genus Apocynumof the dogbane family, Apocynaceae. The spreading dogbane is Apocynum androsaemifolium; Indian, or Canada, hemp is A. cannabinum. For other members of the dogbane family, sDogbane bears clusters of pink, bell-shaped flowers on fibrous stems.