Leaves with 3-4 (to 10 in var. plurijuga) pairs of pinnae; tendrils absent; leaflets 8-13 (to 24 in var. plurijuga) pairs, (1·3)2-3·9(4·6) x (0·4)1-1·6 cm., oblong-elliptic, rounded or subtruncate at the apex, obliquely rounded to subtruncate or even subcordate at the base, pubescent beneath, ± pubescent to subglabrous above; midrib subcentral at least in upper part of leaflet.
Shrub 1·2-1·8 m. high; stems pubescent, virgate, elongate, not or little branched; young parts clothed with a spreading golden (grey in var. plurijuga) indumentum.
Racemes produced to near the apices of the stems, axillary, 1-3 together, 8-18 cm. long (including the 1·3-4 cm. long peduncle); axis pubescent.
Pods 26-37 x 8-9 cm., slightly falcate, subcoriaceous; stipe c. 1·5-3·5 cm. long; joints slightly umbonate in the centre.
Calyx 1-2 mm. long, glabrous or slightly pubescent at the apex of the lobes only (rarely on the tube in var. plurijuga).
Corolla greenish-white to yellow, c. 3·5-4 mm. long; petals 2·5-3·5 mm. long.
Stamen-filaments 5-6 mm. long.
Pedicels 1-1·5 mm. long.
Seeds c. 12-15 x 9 mm.