Rigid, many-branched, almost leafless, pungent shrub, up to 2.5 m tall, sericeous. Leaves unifoliolate, petiole up to 3 mm long, leaflet obovate to oblong. Flowers 4-10, in rigid spine-tipped racemes, yellow, calyx shortly hairy, lobes short and broad, standard pilose along dorsal midrib. Pod laterally compressed, slightly falcate, densely tomentose.
Erect, thorny, almost leafless shrub to 2.5 m. Leaves 1(-3)-foliolate, petiole shorter than leaflets. Flowers bright yellow, wings shorter than keel. Pods oblong to falcate, tomentose, indehiscent, thin-walled.