Leaves: pinnae 2-5 pairs, each pinna broadening or not towards the apex; leaflets of 2 distal pairs of pinnae (2)3-12 pairs, 5-23(27) x 2·5-13(17) mm., oblong-to obovate-rhombic; base auricled or not on the proximal side; apex obtuse to subacute, sometimes acute; surface beneath subglabrous to rather densely pubescent, above glabrous to puberulous or shortly pubescent; stipules very quickly falling and usually absent, 1·75-3·5 x 0·6-1 mm., oblanceolate or triangular-acute.
Pod dehiscent, 4-17·5 x (l·4)1·7-3 cm., oblong, transversely plicate or sometimes flat, eglandular, venose, deep red-purple to brown when ripe, glabrous to ± puberulous over the surface.
Tree, sometimes shrubby, (2)3-21 m. high, deciduous; crown rounded or flat; bark smooth unless fire-scarred; young branchlets shortly crisped-pubescent to almost glabrous.
Peduncles subglabrous to pubescent; bracteoles falling while flowers are still in bud, 1 mm. long, oblanceolate, pubescent.
Corolla c. 7-10 mm., long, glabrous outside or sometimes with a few hairs near the apices of the lobes, white to pink.
Calyx 1-1·75 mm. long, usually glabrous except on the margins, rarely with some hairs on the tube.
Flowers on glabrous or almost glabrous pedicels 1-3 mm. long.
Staminal tube red, exserted c. 1-1·3 cm. beyond the corolla.
Seeds 9-12 mm. long or in diam.