Rhopalostylis baueri is a species of palm native to Norfolk Island (Australia) and to the Kermadec Islands (New Zealand). Norfolk Island is the type locality. The common names on Norfolk Island are 'Norfolk Island palm' or 'niau'. In New Zealand the name 'Kermadec nikau' is used to refer to the Kermadec Islands population
Rhopalostylis baueri reaches 12 m or more in height. The pinnate leaves are 3 to 4 m long, on a stout, erect petiole (leafstem) approximately 20 cm long. The crownshaft is 50-60 cm long. The inflorescence is 30 50 cm long and has from 50 to 60 fairly stout branches. The fruits are green at first, turning a bright red when ripe, and are a favorite food of the endangered Norfolk Island Parakeet. The growing tip of the palm was used by early settlers as a vegetable and is said to have tasted like a nut when raw and like an artichoke bottom when boiled. It is much faster growing than the New Zealand nikau, Rhopalostylis sapida. There is a Rhopalostylis bauer which is on the notable tree list 2002 beside the Cricket Pavilion at Pukekura Park.Trunk up to 15 m tall, and 0.35 m wide, green to dark green fading to grey with age between rather closely spaced leaf-scars; crown-shaft to 0.80 m long, smooth and green, slightly bulging. Leaf to 3 m long, usually dark green; leaflets closely set, ascending sharply, up to 1 m long and 40 mm wide. Spathes c. 380 × 150 mm, between pink and yellow, smooth, falling as first flowers open. Ultimate branches of inflorescence to 300 mm long, c.15 mm diameter with buds on, at first pale cream-coloured; flower-buds tightly packed. Sepals short, the longest one in male rarely = petals; petals white or pink. Fruit c. 13 × 12 mm, subglobose to globose brick-red.