Aphanocalyx

Shrubs or small to large trees. Leaves paripinnate, 1-57-jugate; rachis +/- terete, sometimes with a poorly developed (grooved) rib on upper side; leaflets opposite, distal half usually completely absent, resulting in distal margin being formed by the midrib, both halves (as far as present) with glands; stipules completely fused, with many closely spaced veins. Inflorescence a compound raceme, in most species reduced to a single raceme; bracts densely parallel-veined, glabrous inside; bracteoles fused with sepals, petals and stamens into a short hypanthium. Sepals up to 5, but some or all usually absent; adaxial sepals free to fused. Petals : adaxial petal fully developed; lateral and abaxial ones reduced and often absent. Stamens usually 10, all fertile; adaxial stamen free, 9 united at base; filaments filiform, glabrous; anthers small, broadly elliptic, often with small to large dorsal teeth, longitudinally dehiscent. Ovary on a short stipe, hairy; ovules 1-6; style insertion not hooked, angle 0-90deg. Pod compressed, dehiscing with 2 woody valves, lateral nerve usually distinct, running fairly high and sometimes fused to dorsal wings, dorsal suture sometimes distinctly winged. Seeds disc-shaped; testa thin.