Climbing palm with stems to 50m long. Leaf sheaths with black spines to 25mm long & grapnel-like spines to 220mm. Leaves with 30-62 leaflets per side to 400mm x 15mm armed with minute spines. Inflorescence to 3m long, staminate inflorescence with rachillae to 90mm long & flowers to 4.5mm long, calyx 4mm long, corolla 4mm long. Pistillate inflorescence rachillae to 100mm long with bracts, flower petals 3mm long. Fruit 20mm x 12mm.
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