Australian Tropical Rainforest Plants - Online edition

Cyperus laxus Lam.

Click/tap on images to enlarge
Habit, leaves and inflorescence. © CSIRO
Spikelets and flowers. © CSIRO
Scale bar 10mm. © CSIRO

Lamarck, J.B.A.P. de Monnet de in Lamarck, J.B.A.P. de Monnet de & Poiret, J.L.M. (1791) Tableau Encyclopedique et Methodique 1(1): 146.


Usually flowers and fruits when 1-2 m tall, sometimes when smaller.


Leaves linear, 25-70 x 0.8-2 cm. Margins finely toothed, the teeth just visible with a lens. One vein on either side of the midrib more prominent than the rest.


Inflorescence terminal on a peduncle 25-100 cm long ending in a rosette of bract-like leaves. Flowers borne in spikes arranged in a panicle. Lower flowers in each spike are female while the upper flowers are hermaphrodite.


Fruits (nuts) enclosed in persistent bracts and perianth segments. Nuts ca. 1.5 x 0.75 mm, nearly 3-lobed in transverse section.


Features not available.

Distribution and Ecology

Occurs in NT, CYP and NEQ. Altitudinal range from near sea level to 150 m. Grows in rain forest and gallery forest. Also occurs in New Guinea.

RFK Code
Copyright © CSIRO 2020, all rights reserved.