Slender erect herb or suffrutex, to 1.2 m tall. Leaves paripinnate; stipules linear, to 1.5 cm long; rachis bearing a gland between the leaflets of basal pair; leaflets in 2 or 3 pairs, obovate, inequilateral, obtuse and mucronate at apex, rounded to cuneate at base, 1.5-2 cm. long, 1-1.5 cm wide, ciliolate, glabrous above, pubescent and glaucescent below. Flowers solitary or paired at the nodes, oblique on pedicels; pedicels ca 11 mm long; sepals ovate to oblong, to 8 mm long, ciliate; petals 5, yellow, obovate, to 11 mm. long and 5 mm wide; fertile stamens 7, of unequal sizes, dehiscent by a single terminal pore; anthers 2-4 mm. long; filaments 1-2.5 mm long; ovary pubescent. Legumes linear, arcuate, to 17 cm long, ca 4 mm wide, subglabrous, somewhat quadrangular; seeds rhomboid, ca 4 mm long and 2.2 mm wide, dark brown, shiny.