Herbs, usually milky-juiced, with opposite or whorled entire leaves. Anthers connected to the stigma and the pollen, cohering into waxy masses which hang in pairs from the glands of the stigma. The juice contains caoutchouc.
A Manual of Organic Materia Medica and Pharmacognosy, 1917, was written by Lucius E. Sayre, B.S. Ph. M.