rheumatism weed

(noun) Canadian dogbane yielding a tough fiber used as cordage by Native Americans; used in folk medicine for pain or inflammation in joints. Synonyms: Indian hemp, Apocynum cannabinum.

(noun) North American perennial having pinkish flowers in loose cymes; used in folk medicine for pain or inflammation in joints. Synonyms: common dogbane, spreading dogbane, Apocynum androsaemifolium.