The drug plants of Illinois The drug plants of Illinois . drugplantsofilli44teho Year: 1951 120 ILLINOIS NATURAL HISTORY SURVEY Circular 44 VIOLA TRICOLOR L. Pansy, heart's-ease. Violaceae. The herb (leaves and flowers), and the flowers alone, collected. Grown in gar- dens throughout the state. Contains mucilage, probably the alkaloid violine, and (in the flower petals) the gly- coside rutin. Used as an emetic, cathartic, and expectorant.

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