Stems clustered, to 5 m tall, 0.8-2.5 cm in diam., reddish brown. Leaves pinnate, rarely undivided; sheaths closed and forming crownshafts, 18-34 cm, green or yellowish green, with brown scales; petioles 7-33 cm; rachis 32-100 cm; pinnae (1-)3-12 per side of rachis, gray-green abaxially, falcate, not contracted at bases, multi-veined, regularly arranged, closely spaced; middle pinnae 30-39 × 3-7 cm. Inflorescences branched, pendulous; peduncles 2-3 cm, ca. 0.4 cm wide; rachis 0-0.5 cm; rachillae (1 or)2-5, 10-15 cm, zigzag, rectangular in cross section, glabrous; triads distichously arranged, superficial on rachillae; male flowers to 13 mm, deciduous; sepals to 3.5 mm, connate into a 3-lobed, flat, membranous calyx; petals to 12 mm, unequal, triangular, fleshy, acute; stamens 20 or 21; female flowers to 3 mm; sepals to 3 mm, imbricate, rounded at apices or briefly acuminate, smooth or ciliate; petals to 3 mm, smooth or ciliate. Fruits red, ellipsoid, to 2.5 × 0.8-1 cm.
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