Isopyrum. Isopyrum thalictroides.

Botanical name: 

Isopyrum. Isopyrum thalictroides L. (Fam. Ranunculaceae.)—F. A. Harsten believes he has found two alkaloids, isopyrine and pseudoisopyrine, in the root of this plant, which grows in the forests of middle and southern Europe. (A. J. P., xliv, 453.)

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