Unarmed shrub or small tree. Branchlets densely covered in grey hairs. Leaves twice compound with a distinct gland on the rhachis between the lowest pair of pinnae. Flowers in spherical heads, white to pale yellow. Pods in clusters, thin and flattened but slightly raised over the seeds, splitting into straight halves.
Perennial, Trees, Shrubs, Woody throughout, Nodules present, Stems erect or ascending, Stems greater than 2 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Stem hairs hispid to villous, Leaves alternate, Leaves petiolate, Extrafloral nectary glands on petiole, Stipules inconspicuous, absent, or caducous, Leaves compound, Leaves bipinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 5-9, Leaflets 10-man y, Leaves glabrous or nearly so, Inflorescences racemes, Inflorescences globose heads, capitate or subcapitate, Inflorescence terminal, Bracts very small, absent or caducous, Bracteoles present, Flowers sessile or nearly so, Flowers actinomorphic or somewhat irregular, Calyx 5-lobed, Petals united, valvate, Petals ochroleucous, cream colored, Stamens 9-10, Stamens completely free, separate, Stamens long exserted, Filaments glabrous, Style terete, Fruit a legume, Fruit stipitate, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit compressed between seeds, Fruit glabrous or glabrate, Fruit 11-many seeded, Seed with elliptical line or depression, pleurogram, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.
A large shrub or small, unarmed evergreen tree, bark greyish brown, slightly fissured, young shoots covered by tomentum. Leaves bipinnate, stiuplate, stipule setaceous; rachis 7-15 cm long, pubescent, ending in a soft bristle, common rachis 15-20 cm long, pinnae 4-9 pairs, 5-10 cm long, hairy, ending into a bristle, leaflets 10-17 pairs, sessile, c.10-13 mm long, c.2-4 mm broad, oblique, linear, oblong, acute, glabrous or subglabrous, base oblique. Flowers in globose white heads, often in pairs, peduncle 2.5-3.8 cm long, head 1.5-2.2 cm in diameter. Calyx 2-3.5 mm long, tubular-campanulate, teeth short, villous. Corolla 10-11 mm long, petals free, valvate, spathulate, pilose outside. Stamens 10, much exserted, anthers eglandular. Ovary stalked, pubescent, style filiform, stigma minute. Pod straight, flat, 12.5-20 cm long, c.1.5-2.0 cm broad, minutely pilose, acute at the apex. Stipe 1-2.5 cm long Seeds 15-25, 5.6 mm long, c.4.5 mm broad, oval, glaucous, dark brown, with a prominent U-shaped mark on either side.