Shrubs, sometimes climbing. Branches slender, thinly pubescent or glabrescent. Stipules basifixed, lanceolate, caducous; stipels small, bristly; terminal leaflet obovate, 10-13 cm, abaxially with few adpressed hairs, adaxially green, glabrescent, base deltoid, margin entire, apex caudate-acuminate. Racemes up to 15 cm, often fascicled or paniculate; peduncle long, slender. Pedicels slender, clustered at nodes of rachis. Calyx ca. 4 mm, subglabrous; teeth obscure or very broad, lower ones broader. Corolla white to reddish; standard obovate, ca. 1.2 cm, base narrowed into a short claw, without auricles; wings slightly shorter than curved keel; keel equal to standard. Vexillary stamen only free at base, other part joined with filament tube. Legumes straight, 7.5-12.5 cm × 6-12 mm, glabrous. Fl. Sep-Oct.