From rudbeckia to echinacea: the emergence of the purple cone flower in modern therapeutics.
Flannery
M A
MA
Lloyd Library & Museum, Cincinnati, OH.
D004358:Drug Therapy / Q000266:history*; D049711:History, Modern 1601-; D008517:Phytotherapy / Q000266:history*; D010946:Plants, Medicinal; D014481:United States