WordNet (r) 3.0 (2006):

rheumatism weed
    n 1: 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]
    2: 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]