Cyperus tetraphyllus—Sedge—CYPERACEAE

Cyperus tetraphyllus

Link to Images on Flickr.

Habitat— Grows in or near rainforest.

Distribution— North from Minnamurra Falls, extending inland to Barrington Tops area in New South Wales and into Queensland.

Description—Tufted perennial with short rhizome

Local occurrences

Barrington/Gloucester Tops, Black Head Flora Park, Coocumbac Island, Copeland, Diamond Beach, Diamond Beach LRF, Sea Acres National Park, Tapin Tops National Park, Booti Hill, The Cape Hawke, Wallingat National Park and Zamia Place Reserve

Leaves.—Culms triquetrous, smooth, to 50 cm high, 1 to 2.5 mm diam. Leaves not septate–nodulose, shorter or longer than culms, 2 to 5 mm wide.

Cyperus tetraphyllus
Cyperus tetraphyllus

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

Flowering.—Spring to Summer

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

Ripe.—Summer to Autumn