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Cyperus gunnii Hook.f.
Family Cyperaceae
Cyperus gunnii Hook.f. APNI*

Description: Tall, tufted perennial with short thick rhizome. Culms trigonous to terete, smooth or occasionally scabrous, to 150 cm high, 1.7–4 mm diam.

Leaves septate-nodulose, as long as to exceeding culms, to 6.5 mm wide.

Inflorescence simple to compound with 5–8 primary branches to 12 cm long; clusters dense, spicate to subdigitate, globose, to 20 mm diam.; involucral bracts leaf-like, 2 or 3 much longer than inflorescence. Spikelets flattened, numerous per cluster, 6–15 mm long, 1.5–2.5 mm wide in side view, 6–15-flowered; rachilla narrowly to broadly winged; glume spacing 1.2–2.2 mm; spikelet falling as unit, or rachilla persistent. Glumes broad-acute with mucro to 0.2 mm long, with sides 2–4-nerved, 2–2.7 mm long, usually red-brown to dark red-brown. Stamens 3. Style 3-fid.

Nut trigonous, narrow-ellipsoid, about three-quarters as long as glume, 1.5–2.2 mm long, 0.5–0.7 mm diam., pale yellow-brown to dark brown.

Flowering: spring–summer.

Distribution and occurrence: From coast west to Nyngan and West Wyalong district in NSW. Type subspecies also in SE Qld, Vic, Tas, SA. Subsp. novaehollandiae in Qld.

Grows in swamps and along streams.
NSW subdivisions: NC, CC, SC, NT, ST, NWS, CWS, SWS, NWP, SWP, ?SFWP
Other Australian states: Qld Vic. Tas. S.A.
AVH map***

Text by K. L. Wilson
Taxon concept: KL Wilson in Telopea 4(3) (1991)

N.S.W. occurrences are: subsp. gunnii

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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