Cyperus zollingeri Steud.

Steudel, E.G. von (1854) Synopsis Plantarum Glumacearum 2(7): 17. Type: Hrbr. Zollinger nr. 2689 Java.

Annual, stems up to 40 cm tall, trigonous to triquetrous with thin fibrous roots.

Leaves shorter than the inflorescence, 1-2.5 mm wide, ligule well-developed, stems at base with papery sheaths; scabrid towards the top

Inflorescence simple, loose, peduncle with a spike of spikelets, rays 1-3; involucral bracts erect to almost patent and greatly exceeding the inflorescence, rachilla broadly winged; spikelets pale brown, slightly compressed, linear, 16-60 mm, axis broadly winged; glume 8-nerved and with a green keel, 2.7-3.5 mm long.

Nut trigonous with a depressed apex, light brown to reddish brown, sometimes black, 1.3-1.5 mm long.

Features not available.

Occurs in WA, NT, CYP, NEQ and CEQ. Altitudinal range from near sea level to 580 m. Grows in low forest, monsoon forest, deciduous notophyll vine thicket and moist places in various types of woodland. Also from Africa, Madagascar, Asia to New Guinea.