Erect, branched shrub, 0.9-1.5(-2.0) m high; branches short tomentose, with semiglobose, pubescent, short-shoot tubercles. Leaflets 5-12(-15) mm long, straight or slightly incurved, rigid, green, glabrous, ending in apical, sharp spinelet > 1 mm long. Inflorescences uni-or bifloral; flowers scattered on lateral short-shoots, often many on each branch. Flowers bright yellow. Calyx: tube short, campanulate, shortly hairy; lobes triangular-subulate, narrowing abruptly into a sharp spinelet, midvein distinct. Flowering time Sept.-Dec. Pod widely lanceolate, densely woolly or sericeous.
Erect shrub, 0.8-2 m. Leaves 3-foliolate, leaflets terete, needle-like or slightly angular, straight, rigid, spine-tipped, glabrous. Flowers single on short shoots, often scattered, bright yellow, wings and keel glabrous, calyx shortly hairy, lobes awl-shaped, needle-like, spine-tipped, sometimes hairy.