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

Description: Small, tufted perennial.

Culms trigonous, smooth, with fibrous remains of leaf sheaths, 15–50 cm high, 0.5–1.5 mm diam.

Leaves scarcely septate-nodulose, the longest about as long as culms, to 3 mm wide. Inflorescence simple with 3–8 branches to 8 cm long; digitate clusters 10–20 mm diam.; involucral bracts leaf-like, 1 or 2 often much longer than inflorescence. Spikelets flattened, 3–8 per cluster, 4–14 mm long, 1.5–2 mm wide, 10–20-flowered; rachilla not winged, persistent. Glumes with sides 1-nerved, c. 1.5 mm long, whitish to pale brown with prominent green midrib. Stamens 3. Style 3-fid.

Nut trigonous, ellipsoid, about two-thirds as long as glume, c. 1 mm long, c. 0.6 mm diam., dark brown.

Flowering: spring–summer.

Distribution and occurrence: Grows in moist shaded places in woodland; south to Nowra and west to Barraba district.
NSW subdivisions: NC, CC, SC, NT, NWS
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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