Habit: solitary, erect or decumbent, to 2-3 m tall. Stem: 2.5 cm diam., green, ringed, internodes 7.5 cm long. Leaves: 4-6, erect-spreading, pinnate; sheath 25 cm long, splitting opposite petiole and obliquely long-open, clasping tightly only in basal 1/2; petiole 30-35 cm long, slightly grooved and green above, rounded and pale-banded below; rachis 1 m long, slender and attenuate apically, sharply angled and green above, rounded and green below; pinnae 7-8 on each side of rachis, lower middle the largest, these to 35-37 x 12-13 cm, becoming progressively smaller toward apex of rachis, broadly rhombic-lanceolate, regularly arranged, opposite or subopposite, slightly sigmoid, ± downward-cupped, long-acuminate with drooping tips, narrowly contracted basally with 8-10 nerves, these not very prominent above, more prominent with an equal number ofsecondary nerves below. Inflorescences: interfoliar, erect, becoming spreading in flower or fruit, long-pedunculate; peduncle to I m long or slightly more, 2-2.5 cm wide at base, 1 cm wide at apex, green or pale in flower, orange in fruit; bracts 7-8, tightly sheathing, obliquely open apically, drying brown by anthesis; rachises 6-10 cm long, green in flower, red-orange in fruit. Staminate with 20 rachillae, these to 30 cm long, slender, pendulous, green. Pistillate with 12-15 rachillae, these to 20-25 cm long, spreading, greenish yellow in flower, red-orange in fruit. Flowers: Staminate in fairly dense spirals but not contiguous in bud, 3 x 2.5 mm, depressed-diamond-shaped, greenish yellow; calyx low, green; petals valvate, connate apically and basally and apically adnate to pistillode and corolla opening by lateral slits, longitudinally striate-nerved. Pistillate not seen. Fruits: 7-8 mm diam., obovoid-g1obose, black.
Dense, wet forest on the Pacific slope; 1,000 m elevation.