Fls perfect; hypanthium short, hemispheric; cal irregular, 5-toothed; cor irregular, almost papilionaceous, but the upper petal the smallest and internal to the 2 upper lateral ones, the lower petals the largest, distinct; stamens 10, distinct; anthers versatile, longitudinally dehiscent; pods thin and flat, narrowly oblong, rather tardily dehiscent, several- seeded, strongly margined along the upper suture; trees or shrubs with simple, cordate, entire lvs and sessile fascicles of pedicellate fls borne on the stems of the previous year and opening before the lvs. 6, North Temperate.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.