Stems solitary, 2-8 m tall, to 15 cm in diam. Leaf petioles to 1 m; rachis to 2 m; pinnae many per side of rachis, linear-lanceolate, very briefly lobed along margins, with ears at bases, regularly arranged and spreading in same plane except for basal few pinnae; middle pinnae 30-36 cm, 3-4 cm wide at mid-point. Inflorescences 80-100 cm; male rachillae to 100, to 17 cm; male flowers 4-5.5 mm; sepals ca. 2 mm; petals ca. 5.5 mm; stamens 9-23; female inflorescences not known. Fruits not known.