Procumbent or prostrate shrublet, with branches to 1 m. Leaves 3-foliolate, leaflets awl-shaped, straight, rigid, yellow spine-tipped, glabrous or sparsely hairy. Flowers 1 or 2 at tips of densely leafy branches, lemon-yellow or violet on keel and back of standard, wings hairy, keel whitish hairy, sometimes with little tip below apex, calyx whitish hairy, lobes triangular, yellow spine-tipped.