Climbing palm to 100m. Leaf sheath armed with spines to 15mm x 2mm. Leaf to 3m long with cirrus 1.5m, cirrus with brown claws, up to 20 leaflets per side, leaflets to 310mm x 50mm. Staminate inflorescence to 620mm long with rachis bracts to 90mm x 15mm armed with spines, rachillae to 22mm long with 12-15 flowers per side. Staminate flowers to 2mm diameter, calyx to 1.5mm, petals to 2mm x 1mm. Pistillate inflorescence to 1.5m long, rachillae to 250mm long, flower calyx 2.5mm with lobes 1mm x 2mm, petals 3mm x 1.5mm. Fruit 19mm x 14mm.