'rheumatism weed' definitions:

Canadian dogbane yielding a tough fiber used as cordage by Native Americans; used in folk medicine for pain or inflammation in joints [syn: Indian hemp, rheumatism weed, Apocynum cannabinum]

North American perennial having pinkish flowers in loose cymes; used in folk medicine for pain or inflammation in joints [syn: common dogbane, spreading dogbane, rheumatism weed, Apocynum androsaemifolium]