pleurisy root(redirected from butterflyweed)
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See butterfly weed.
pleurisy rootAn herbal root which contains glycosides—e.g., asclepiadin, resins, volatile oil; it is antispasmodic, diaphoretic, expectorant, tonic, carminative and mildly cathartic, and has been used by herbalists for respiratory tract infections.
Fresh roots may cause vomiting and toxicity at high doses.