Annual, glabrous to subglabrous. Stem ascending, often reddish. Leaves suborbicular to reniform, palmatipartite, 10-40 mm broad; lamina often sparse pilose. Segments usually 3-lobed, lobes obtuse, mucronate. Stipules 1.5-2.5 mm long, broad lanceolate, glabrous. Petiole and peduncles unilaterally pubescent. Sepals 5-7 mm long, ovate, acuminate, 3-nerved, glabrous, transversely rugose (the wrinkles prominent in dry state), awn c. 1 mm long. Petals longer than the sepals, spathulate, reddish pink, claw narrow. Filament base scarcely dilated, glabrous. Beak 7-8 mm long, glabrous. Mericarps longitudinally rugose-reticulate, along suture glandular-uncinate. Seed 2 mm long, oblong, reddish, glabrous, lower end with a black protuberance.