Prostrate annual, forming patches up to c. 20 cm diam. Stems sparsely to moderately clothed in long hairs. Basal and lower cauline lvs petiolate, sheathing at base, moderately hairy, 2-3-pinnatisect, up to c. 12 × 3 cm; primary divisions in 4-8 pairs; ultimate segments narrow-elliptic to subulate, all in one plane. Cauline lvs similar to basal, but usually smaller. Involucral bracts in 1-2 rows, hairy, obtuse to apiculate, 3-5 mm long. Capitula inconspicuous at flowering, clustered near base of plant and separated by short obscured internodes, 5-12 mm diam. at fruiting, with 30-numerous mature achenes. Achenes 3-4.5 × 1-1.5 mm (including spine), sometimes with short hairs on both surfaces but not on wings, with long erect hairs at apex giving a woolly appearance to the fruiting capitulum; lateral angles entire, with narrow thick wings horizontally ridged in lower ⅔, rounded or squared to apex; spine 1-2 mm long.