Compact herb up to ± 5 cm. tall, sts forming rather large patches by offset plants; lamina ± prostrate, 1-2-(4) cm. long, on petiole up to ± 5 mm. long, with broad membr. sheath up to 10 mm. long, produced into a short blunt ligule; pinnae 4-8 very close-set overlapping pairs, sessile, ± 2 mm. long, us. imbricate, 3-6-lobed or toothed, segs linear, hair-process ± 2 mm. long. Peduncle 2-4-(8) cm. long, ± decumbent. Umbels simple or compound, ± hidden among lvs; rays short; involucral bracts linear. Fr. broad-ovoid, c. 3-4 mm. long; mericarps distinctly 5-winged.