Tree, to 15 m tall, ca 40 cm dbh; outer bark thin, sand-papery, unfissured, dark brown; inner bark thick, hard, reddish-brown with irregular, white, radial lines, the sap sweet, not aromatic; stems conspicuously lenticellate. Leaves bifoliolate, stiff; petioles to 5 mm long; leaflets very inequilateral, emarginate at apex, acute at base, 3-6 cm long, 1-2.8 cm wide, glabrous or sparsely pubescent on midrib. Fascicles short-pedunculate, 5-15 mm long, l to several in leaf axils, conspicuous and conelike in bud; bracts prominently veined, 1-2.3 mm long; pedicels crisp-villous, 4-8 mm long; sepals 4, ca 3 mm long, membranaceous, deciduous; petals 5, white, to 3.6 mm long, unequal, inserted on a disklike receptacle; stamens exserted. Legumes oblong to subrotund, 3.5-4.5 cm diam, minutely and densely tomentose, with a hard exocarp to 2 mm thick; seed 1. Foster 1663. Known only from the shore of Chapman Cove. Seasonal behavior uncertain. Flowers have been seen in April and July, and fruits in July and September.