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Cyperus tetraphyllus R.Br.
Family Cyperaceae
Cyperus tetraphyllus R.Br. APNI*

Description: Tufted perennial with short rhizome.

Culms triquetrous, smooth, to 50 cm high, 1–2.5 mm diam.

Leaves not septate-nodulose, shorter or longer than culms, 2–5 mm wide. Inflorescence usually simple with 4–10 branches to 10 cm long, rarely head-like; digitate clusters to 40 mm diam.; involucral bracts leaf-like, 3–6 longer than inflorescence. Spikelets flattened, 2–5 per cluster, 6–40 mm long, c. 2 mm wide in side view, 10–60-flowered; rachilla not winged, persistent. Glumes obtuse, short-mucronate, with sides not to thickly several-nerved, 1.5–2 mm long, very dark red-brown to blackish. Stamens 3. Style 3-fid.

Nut trigonous, ellipsoid, about as long as glume but broader than it, c. 1.3 mm long, c. 0.8 mm diam., yellowish.

Flowering: spring–summer.

Distribution and occurrence: Grows in or near rainforest; north from Minnamurra Falls, extending inland to Barrington Tops area.
NSW subdivisions: NC, CC, NT, CWS
Other Australian states: Qld
AVH map***

Text by K. L. Wilson
Taxon concept: Flora of NSW 4 (1993)

APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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