A slender, solitary palm; stem 2-10 m. tall, 3-5 cm. in diam. Leaves ca. 9, spreading; sheath 30-50 cm. long, densely white woolly and brown puncticulate throughout, sometimes with an inconspicuous triangular appendage at the apex opposite the petiole; petiole 20-45 cm. long, densely white woolly and sparsely to moderately lepidote with brown punctiform scales and dark, irregular ramenta; rachis 130-300 cm. long, lepidote as on rachis, sometimes very densely lepidote around and on base of the Pinnae; pinnae 8-10 on each side, regularly or irregularly arranged, basal pinnae reduced and sometimes crowded, central pinnae cuneate, praemorsely 3-pronged, 38-68 cm. long on the midrib, 22-27 cm. broad just below the two deep notches, apical pinnae wedge-shaped, 3-4-ribbed, ca. half as long as central pinnae. Inflorescence branched to 2 or 3 orders, 25-74 cm long, 22-58 cm. wide, with peduncle ca. ¼ as long as the rachis, complete peduncular bract twice as long as prophyll and exserted from it at maturity; axes thickly dark lepidote-tomentose and somewhat white woolly when young, glabrescent with age; upper peduncular bracts 1 or 2, very small and ribbonlike or sometimes triangular to elongate, 2-7.5 cm Iong; rachillae 1.5-4 mm. thick in the middle, 9.5-28 cm. long, each bearing 28-60 triads and diads. Flowers cream-colored or yellow-green, glabrous or sparsely punctate; staminate flowers 7-9 mm. long, 3-5 mm. wide, with calyx ca. 2-2.5 mm. high, stamens ca. 130-200; pistillate buds ca. 6 mm. high and 4-6 mm. broad at staminate anthesis. Fruit yellow-orange at maturity, ellipsoid, 31-35 mm. long, 17-19 mm. in diam. when dry, outer part of the fruit wall drying in close conformity to the angled endocarp when incompletely ripe, but drying apart from the endocarp when fully ripe, endocarp 5- or 9-ribbed; seed 5-grooved with the lobes squarish or acute in cross-section, endosperm homogeneous.