Australian Tropical Rainforest Plants - Online edition

Cyperus pedunculosus F.Muell.

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Herbarium specimen showing inflorescence. © CSIRO
Herbarium specimen showing plant base, leaves and inflorescence culm. © CSIRO
Close up of spikelets on herbarium specimen. © CSIRO

Mueller, F.J.H. von (1874) Fragmenta Phytographiae Australiae 8(65): 266. Type: Rockinghams Bay; Dallachy.


Perennial with very short rhizome. Stems tufted, triquetrous, sometimes destinctly 3-winged, 10-75 cm tall.


Leaves flat but canaliculate at the base, longer than the stems, scabrid on margins and nerves, with 3 prominent nerves, 6-20 mm wide. Culms erect, trquetrous to distinctly 3-winged, 25-45 cm long, 2-5 mm wide, thickened by inflated, scarious, purplish sheaths.


Inflorescence compound, loose, 10-20 cm long. Involucral bracts 5-6, 30-45 cm long, 6-15 mm wide, longer than inflorescence, scabrid. Spikes 6-12, 5-25 mm long, with 1-7 spikelets. Spikelets digitately arranged, compressed, 10-40(-50) -flowered. Glumes often dark reddish or red-brown, ovate to ovate-lanceolate, 2.6-3.5 mm long, incurved, 11-17 -nerved.


Nut trigonous, obovoid to ellipsoid and blackish brown, ca. ½ length of glume.


Features not available.

Distribution and Ecology

Occurs in NEQ and CEQ, and in south eastern Queensland. Altitudinal range from 30-800 m. Grows in wet rainforest, often along shady creek banks. Also occurs in New Guinea.

Cyperus pedunculosus F.Muell. var. pedunculosus, Bibliotheca Botanica 20(85): 425(1914). Cyperus pedunculosus var. floribundus Kuk., Botanische Jahrbucher fur Systematik 59: 44(1924). Cyperus pedunculosus var. longebracteatus Domin, Bibliotheca Botanica 20(85): 425(1914), Type: Bellenden-Ker, 200 m. DOMIN, XII. 1909. Cyperus pedunculosus var. atrocastaneus Kuk., Botanische Jahrbucher fur Systematik 69(2): 256(1938), Type: . Cyperus pedunculosus var. alatus Kuk., Mitteilungen des Thuringischen Botanischen Vereins 50: 3(1943).
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