Plants polygamo-dioecious; fls regular, perfect or unisexual; hypanthium tubular; sep and pet each 5, nearly alike, inserted in a single series; stamens 10, distinct, alternately long and short; anthers versatile, longitudinally dehiscent; pods broadly oblong, woody, indehiscent, flat but thick, with a few large seeds separated by pulp; trees, without small twigs but with very large, bipinnately compound lvs; fls in terminal panicles. 1 e. U.S., 4 e. Asia.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.