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

Synonyms: Cyperus debilis R.Br. APNI*

Description: Small, densely tufted perennial.

Culms terete to trigonous, smooth, to 50 cm high, c. 0.6 mm diam.

Leaves not septate-nodulose, usually shorter than culms, c. 0.5 mm wide. Inflorescence a digitate cluster to 25 mm diam. of 2–14 spikelets, without branches, or rarely a solitary spikelet; involucral bracts leaf-like, 2–4 much longer than inflorescence, the lowest erect. Spikelets flattened, 3–15 mm long, c. 2 mm wide in side view, to 20-flowered; rachilla not or narrowly winged, persistent. Glumes acute, with sides 1- or 2-nerved, c. 2 mm long, whitish to pale brown. Stamens 3. Style 3-fid.

Nut trigonous, broad-obovoid, not much shorter than glume, 1.2–1.3 mm long, 0.7–0.9 mm diam., dark brown.

Flowering: spring–summer.

Distribution and occurrence: Grows in rainforest and wet sclerophyll forest; north from Wyong.
NSW subdivisions: NC, CC
Other Australian states: Qld
AVH map***

There is a small but distinct globose bulge near the base of the style base, which is persistent on the nut.

Text by K. L. Wilson (1993); edited KL Wilson (JUne 2020)
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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