Glab. perennial herb with stout deeply descending taproot up to c. 3 cm. diam. near often multicipital stock. Stems rather stout, sts up to ± 2 cm. diam. near base, grooved, sparingly to much branched, decumbent, up to c. 5 dm. long. Lvs on stout petioles up to c. 10 cm. long, sheathing at base. Lamina up to 4 cm. long, coriac., ± fleshy, shining, irregularly 2-3-pinnate. Lflts sessile or on petiolules up to 1 cm. long, irregularly 3-5-partite; segs broad or narrow, incised or deeply lobed; teeth crenate-dentate. Umbels subsessile, up to c. 15 mm. diam., (3)-4-8-(15)-rayed, rays up to c. 5 cm. long. Secondary umbels us. developed, rays 5-7, c. 6 mm. long. Petals white. Fr. broad-ovoid, glab., 2-3 mm. long; mericarps with prominent, thick, blunt ribs; vittae obscure.