Solitary fan-leafed palm to 25 m tall, diameter 60-90 cm. Leaf blades are massive, 5-6 m wide supported by equally massive petiole of 3 m or more long. The species is hapaxanthic, producing the largest inflorescence in the plant kingdom on maturity. Flowering and fruiting occurs in a single event producing an enormous panicle c. 6-8 m long with cream-coloured, plume-like flowering branches. The plant produces thousands of globose yellow-green fruits 3-4 cm diameter.