What is "rheumatism weed"

n. 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, 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, Apocynum androsaemifolium]