Climber to 25m. Leaf to 750mm long, sheath with numerous spines to 6mm x 1mm. Flagellum to 2m. 28 bristly leaflets per side, longest to 330mm x 20mm. Staminate inflorescence to 2.2m with flagelliform tip to 250mm, primary branches to 190 long with 11 rachillae to 400mm x 1.5mm with bracts 1.4mm x 1.5mm. Staminate flowers 3.mm x 1.7mm, calyx 1.8mm diameter, 3 lobes 0.7mm x 1mm, corolla 2.5mm x 1.5mm.