Annual herb, stems up to 60cm long, erect or ascending, pilose with spreading gland-tipped hairs. Stipules ovate, acute. Radical leaves several, petioles up to ±100 mm long, hairy as the stems; blade up to 80 mm in diam., divided to the base into 3-5 lobes, each lobe ovate in outline, base cuneate tapering to a petiole-like part (the leaf looks compound), bipinnatisect, with a few long coarse hairs above and below, or almost glabrous; cauline leaves similar but petioles rapidly shorter. Peduncles opposite the leaves and terminal, forming compound cymes, mostly 2-flowered, pilose with spreading glandular hairs and shorter, curled eglandular ones. Pedicels similar to peduncles. Sepals ±5-6 x 2.5 mm, ovate, glandular-pilose. Petals ±9 x 2.5 mm, elliptic-oblong, entire, narrowed to a claw, purplish-pink. Rostrum glabrous. Carpels transversely ridged, glabrous.