Annual prostrate, ascending, sometimes scandent scabrous & hairy plant to 600mm with prickly stems. 3-7 lobed coarsely-toothed, bristly-mucronate leaves to 40mm x 55mm, strigose above & hirsute beneath. Axillary umbels to 5 flowers, greenish-white or purplish flowers, glabrous petals to 0.6mm long. 4-winged bristly fruit 2.5mm x 2mm.