Woody climbers, mostly tropical, with peltate or palmate alternate exstipulate leaves, and small dioecious, greenish, or whitish flowers in axillary panicles. Sepals and petals alike, in three rows—the petals sometimes wanting. The stamens equal or exceed the petals in number. Pistils 2 to 6, with nearly straight ovaries, which, however, are incurved in fruiting, so that the seed is either a crescent or a ring.
A Manual of Organic Materia Medica and Pharmacognosy, 1917, was written by Lucius E. Sayre, B.S. Ph. M.