Climbing palm to 30m+. Sheaths with black spines to 25mm x 4mm. Flagellum to 3m. Leaf to 2m with 40-50 leaflets per side, brostly leaflets to 450mm x 10mm. Male inflorescence to 3m+, dense catkin 8mm x 3mm of male flowers. Female inflorescence with rachillae to 80mm x 4mm.