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Cyperus pedunculosus

Family

Cyperaceae

Botanical Name

Cyperus pedunculosus F.Muell.

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

Synonyms

Cyperus pedunculosus F.Muell. var. pedunculosus, Bibliotheca Botanica 20(85): 425(1914), Type: . Cyperus pedunculosus var. floribundus Kuk., Botanische Jahrbucher fur Systematik 59: 44(1924), Type: . 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), Type: .

Stem

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

Leaves

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.

Flowers

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.

Fruit

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

Seedlings

Features not available.

Distribution and Ecology

Occurs in NEQ and CQ, from Buderim in CQ to near Davies Creek in NEQ (Booth et al, 2009). Altitudinal range from 30-800 m. Grows in wet rainforest, often along shady creek banks. Also occurs in New Guinea.

NEQ

X

Grass

X

RFK Code

4288