Forming small to rather large tufts, with us. stout stems sts up to ± 1 m. tall. Lvs ± 3-5 dm. long, pinnate; occ. 2-pinnate lvs are present. Sheaths up to c. 6 × 3 cm. long, rather thin; stipules stiff, simple or occ. with accessory smaller pinnules, up to ± 7 cm. × 4 mm., tapering to pungent apex; petioles up to c. 10 cm. long, stout, winged; lower internodes up to ± 3-4 cm. long. Pinnae 2-4 pairs, slender strongly serrulate; midrib broad, prominent, red to orange; lower laminae up to 20-40-(45) cm. × ± 12 mm., narrowing to pungent apex. Infl. narrow-oblong. Lower bracts with sheath ± 30 × 12 mm., tapering to long pungent tips; lamina ribbed, ± 10 cm. × 3-4 mm., with stout prominent red to yellow midrib, with pungent point up to ± 3 mm. long. Umbels crowded, from near base to apex of peduncles; umbellules crowded, on slender rays to ± 1 cm. long; Fr. c. 8 mm. long. mericarps 4-3-winged. Vittae 2-4 per furrow. 5-6 commissural

Stock stout, simple or branched; taproot deeply descending; stem stout, up to c. 6 dm. tall. Lvs ± 3 dm. long, pinnate; pinnae 3-foliolate or the lowest again pinnate. Sheaths c. 5 × 1 cm., thin, tapering to spinous-pointed stipules up to 2 cm. long (stipules occ. vestigial). Petioles 3-5 cm. long; midrib stout, winged; lower internodes 2-3 cm. long, midrib prominent. Primary pinnae us. 3-6 pairs, up to c. 15 cm. long. Terminal lflt up to 14 cm. × 5-8 mm., striate, with strong reddish to yellow midrib; margins thickened, serrulate-crenulate, apex pungent. Stems of male plants stout, up to 6 dm. × 10 mm. including stout oblong infl. up to 3 dm. long. Bracts ∞, sheaths up to 4 cm. × 14 mm.; stipules rigid, ± 10 mm. long; lamina us. simple, ± 5 cm. × 2-3 mm. Umbels on very slender primary rays ± 10 mm. long; umbellules up to c. 5 mm. diam., on few capillary rays. Stems of female plants up to 6 dm. × 10 mm.; infl. more compact. Bract-sheaths ± 4 cm. × 10 mm.; stipules up to c. 10 × 2 mm., gradually narrowed to pungent apex; lamina on petiole up to 10 mm. long, with a pair of 3-foliolate lflts, somewhat squarrose; longest lflt up to c. 4 cm. long. Umbels ∞, ± concealed by bracts. Fr. ± 3-4 mm. long.