Annual or biennial, prostrate, densely appressed whitish silky pubescent herb. Stem hirsute to sericeous, branches spreading. Leaves paripinnate, 2.5-5 cm long; stipules lanceolate to falcate, 3-5 mm long; leaflets (4-) 5-6(-8) pairs ovate to elliptic-oblong, 5-10(-12) mm long, 3-8 mm broad, inequilateral, acute. Flowers yellow, 1-1.5 cm across; pedical up to 1.5(-2) cm long. Sepals ovate-lanceolate, 5-6 mm long, c. 3 mm broad, acute. Petals obovate, 6-8 mm long, 3-4 mm broad, obtuse. Stamens 10, filaments c. 3-5 mm long, anthers versatile. Ovary ovoid, hirsute; style c. 1.5 mm long, stigmas decurrent. Fruit up to c. 1 cm in diameter, 4-8 mm long, mericarps densely crested and tuberculate on dorsal side, densely hairy to glabrescent, with 2 long patent and 2 short downwardly directed spines (rarely all or lower 2 reduced to tubercles).
Flowering Period: Almost throughout the year.