Shrubs, as viburnum, or twining plants, as the honeysuckle, with opposite, exstipulate leaves, a gamopetalous corolla, and the fruit a berry, pod, or drupe. The calyx-tube is adherent to the 2- to 5-celled ovary.

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