Annual to biennial, up to 25 cm tall, glandular to glabrous shrublet. Stem basally woody, branches prostrate to erect, terete, striate, with up to 1-3 (-3.5) cm long internodes. Lower leaves trifoliolate, petiole, up to 10-12 (-15) mm long terminal leaves unifoliolate, with up to 5 mm long petiole; leaflets linear-oblong, up to 3.5 cm long, acute, central the largest; stipular spines aculeate, shorter than leaves and internodes, patent, not reflexed. Flowers pinkish-purple, c. 8-10 mm across, pedicel up to 6 mm long. Sepals ovate, 3-4 mm long, sparsely glandular hairy outside, deciduous or semi-persistent. Petals obovate, 4-6 mm long, c. 2-3 mm broad, obtuse. Stamens with 3-4 mm long filaments. Capsule c. 4 mm long pubescent, pedicel c. twice as long as fruit.