Botanical name: 

Ageratum. Ageratum conyzoides L. (Fam. Compositae), a Brazilian plant commonly known in cultivation as ageratum, is said by Barker Smith (C. D., May 15, 1876) to be used as an emmenagogue.

The Dispensatory of the United States of America, 1918, was edited by Joseph P. Remington, Horatio C. Wood and others.