Volume III (1980) - Flora of New Zealand Adventive Cyperaceous, Petalous & Spathaceous Monocotyledons
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Cyperus gunnii Hook.f.

*C. gunnii Hook f. Fl. Tasm. 2, 1858, 80, t. 140A.

Tufted clump, shortly rhizomatous; rhizome stout, woody, c. 1 cm diam. with dark brown scales. Stems to c. 1 m high, tough, 3-angled, smooth, c. 3 mm diam., thickened and leafy at base. Leaves ± = or < stems, c. 4 mm wide, channelled, conspicuously septate-nodulose, margins ± sparsely scabrid, tip ± pungent; sheaths reddish-brown, septate-nodulose. Involucral bracts much > inflorescence, c. 3, leaf-like, unequal, 2 lowermost much the longest. Inflorescence a compound umbel with several rays to 5 cm long. Spikelets numerous, to 10 × 1.5 mm, in ± loose, hemispherical red-brown spikes; rhachilla hardly winged. Glumes ± 2.5 mm long, obtuse, strongly nerved. Stamens 3. Style-branches 3. Nut slightly < glume, obtusely trigonous, greyish-brown.

N. North Auckland - "Okaihau, Bay of Islands Co., ungrazed river margin", A. E. Esler, 25.11.1970 (CHR 284143); only collection. (Australia)

First record: ‡

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