Stems gray-white, 30 m, diam. 35--41 cm, smooth. Leaves: segments inserted on rachis in several ranks at divergent angles, giving leaf anappearing almost plumose appearance. Inflorescences to 1 m; rachillae 11--31 cm, stiff. Flowers white; anthers pinkish. Fruits ripening from green through red to purplish black at maturity, dorsiventrally compressed obovoid, 9.5--10.5 mm, diam. 7.4--7.8 mm. 2n = 36.
Variable tree, usually not exceeding 25 m. in height, trunk not uniformly columnar but swollen at or near the middle and commonly at the base: leaves shorter and pinnae fewer in each line or row, with a brush-like look, pinnae 3-4 cm. broad: spadix branches not undulate: fruit long-globose to nearly globular, somewhat narrowed to base, 8-13 mm. long and approximately 10 mm. thick, red-brown or purplish at maturity.
Stem up to 40 m tall, usually displaying a distinct thickening towards the middle, greyish white, smooth. Crown roundish, leaves up to 4 m long, drooping, divided into numerous leaflets, pinnae in two rows on either side of rachis, lower pinnae 60-71 x 2-2.5 cm, middle pinnae 70-90 x 3.5-5.0 cm, reduplicate from the base, rachis tapering towards the apex; petiole glabrous, unarmed, smooth, elongated into a leaf sheath forming a shining greenish elongated crown shaft, crown shaft reaching up to 120 cm. Inflorescence profusely branched. Male flower much larger than the female, calyx and corolla 3-lobed, corolla thin, larger than the calyx, petals 0.5 x c. 0.2 mm, valvate, joined at the base; stamens 9, exserted, filaments subulate, 0.5 mm long, joined at the base beneath the pistillode; pistillode smaller, anthers dorsifixed, large. Female flowers 3-4 mm long, white; stigma triangular and surrounded by 6 scale-like staminodes. Fruit globose, fleshy 1-1.2 cm long, scar near the base of the fruit.