Trees or shrubs with opposite or whorled coriaceous leaves; stamens indefinite; stigmas sessile, radiant. Many species, like the gamboge, yield a yellow juice; the seeds of others are oily. Among the edible fruits of the order is the mangosteen, regarded as the most delicious fruit in the world.
A Manual of Organic Materia Medica and Pharmacognosy, 1917, was written by Lucius E. Sayre, B.S. Ph. M.