97. POPULUS.—WHITE POPLAR. AMERICAN ASPEN. The bark of Pop'ulus tremuloi'des Michaux. Tonic and febrifuge. Its active principle, populin, is analogous to the salicin of salix (96). Dose of fl'ext.: 30 to 60 drops (2 to 4 mils).

A Manual of Organic Materia Medica and Pharmacognosy, 1917, was written by Lucius E. Sayre, B.S. Ph. M.