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Scale bar 10mm. Copyright CSIRO
Spikelets and flowers. Copyright CSIRO
10th leaf stage. Copyright CSIRO
Cyperus decompositus (R.Br.) F.Muell.
Mueller, F.J.H. von (1874) Fragmenta Phytographiae Australiae 8: 267. Type: ?.
Mariscus decompositus R.Br., Prod.: 218(), Type: Northern Australia, R. Brown; holo: BM?.
Usually flowers and fruits when about 1-2 m tall.
Leaf blades about 81-120 x 1-2 cm, V-shaped in transverse section particularly towards the base. Margin and midrib on the lower surface finely toothed.
Inflorescence terminal, produced on a long peduncle which usually ends in a whorl of leafy bracts, sometimes with spaced leafy bracts at various points on the peduncle. Inflorescence a panicle of spikes.
First leaf linear, second leaf linear, about 20 x 1 mm. Leaf bases sheathing the stem. At the tenth leaf stage: leaf blades linear, 40-45 x 0.6 cm, venation longitudinal and parallel, petiole 20-25 mm long, base sheathing.
Distribution and Ecology
Food plant for the larval stages of the Six-spot Skipper Butterfly. Common & Waterhouse (1981).