Stems stout, finely grooved, up to c. 5 dm. tall; lamina narrow-oblong, up to c. 12 cm. long, on rather stout petiole ± 8 cm. long; sheaths delicate ± 2 cm. long, with short blunt ligule; pinnae 8-10 pairs, rather distant, submembr., flabellate, 10-20 × 10-20 mm., sessile by broad base; teeth subacute, with hair-process. Bracts foliaceous, with open sheaths narrowed to lamina up to c. 4 cm. long with ± 4 pairs of pinnae. Umbels axillary and terminal, compound, on peduncles c. 8 cm. long. Primary rays up to 15, up to 3 cm. long; involucral bracts linear, acuminate, up to 2 cm. long; secondary rays short, up to 15. Fr. narrow-ovoid, c. 5 mm. long.