Caustis R.Br.

Leaves reduced to brown scales sheathing the culm Caustis
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Ultimate branches flexuose, curved into spirals. Culms up to 60 cm high
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Stamens 5–6. Spikelets functionally unisexual with males and females on separate culms. Branches bearing male spikelets considerably less flexuose than those bearing female spikelets
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Glumes and rhachis glabrous at maturity. Spikelet c. 2 mm wide. Coast. Heath and DSF. Deep sands Caustis recurvatarecurvata
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Glumes and rhachis pubescent at maturity. Spikelet 3–4 mm wide. Coast south of Port Jackson. Heath and DSF. Deep sands Caustis recurvatahirsuta