Erect, often rod-like shrublet up to 1m. Leaves 3-foliolate, leaflets oblong-oblanceolate, shortly hairy or subglabrous, on prominent, nearly spur-like tubercles (small, rounded protuberance); flowers single on short shoots, scattered, pale yellow, wings and keel silky, calyx shortly hairy, lobes ovate-triangular.

More noticeable after fire.