Apocynum androsaemifolium. N.O. Asclepiadaceae.Synonym: Dogsbane, Milkweed. Habitat: Indigenous to North America.Features ? Root is nearly three-quarters of an inch thick, light brown, transversely- wrinkled bark, easily parting from white, woody centre ; groups of stone cells in outer bark. Whole plant gives a gelatinous, milky juice when wounded.Part used ? Root.Action: Cathartic, diuretic, detergent, emetic, tonic.2-5 grains thrice daily as a general tonic, useful in dyspepsia. 5-15 grain doses in cardiac dropsy. Has been recommended in the treatment of Bright's disease. Large doses cause vomiting. Tendency to gripe can be eliminated by adding Peppermint, Calamus or other carminative.