HABIT	A MORE OR LESS PUBESCENT ANNUAL HERB.
STEMS	STEM WITH PROSTRATE OR DECUMBENT PRIMARY BRANCHES UP TO 1.5 M LONG RADIATING FROM THE CROWN OF THE TAPROOT.
LEAVES	OPPOSITE, PARIPINNATE, UP TO 5.5 CM LONG, ONE OF EACH PAIR USUALLY SMALLER THAN THE OTHER; LEAFLETS 3-6 PAIRS, 6-12 MM LONG, OBLONG TO LINEAR-OBLONG, WITH SILKY HAIRS ON BOTH SURFACES, APEX MUCRONATE, BASE ROUNDED OBLIQUE.
FLOWERS	PALE-YELLOW TO YELLOW, 0.7-2 CM IN DIAMETER, LEAF-OPPOSED, SOLITARY.
FRUITS	A SCHIZOCARP, GLOBOSE, 1-1.5 CM ACROSS, CONSISTING OF 5 WOODY COCCI, EACH WITH 2 PAIRS OF HARD, SHARP, DIVARICATE SPINES, ONE PAIR LONGER THAN THE OTHER.
SEEDS	SEEDS SEVERAL IN EACH COCCUS WITH TRANSVERSE PARTITIONS BETWEEN THEM; MINUTE, OBLONG.