Trees and shrubs, without stipules. Leaves opposite, entire, pellucid-punctate, usually with a vein running close to the margin; they are usually fragrant and pungent, due to volatile oil residing chiefly in the pellucid dots or glands.
A Manual of Organic Materia Medica and Pharmacognosy, 1917, was written by Lucius E. Sayre, B.S. Ph. M.