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Annuals. Rhizomes absent. Culms tufted, erect, 11-30 cm tall, ca. 0.5 mm wide, 3-angled, sulcate, glabrous. Leaves basal and cauline, sheathing; contraligule rounded to obtuse; leaf blade capillary, ca. 1 mm wide. Involucral bracts setaceous, basal one to 0.6 cm and shorter than spikelet cluster; bractlets glumelike. Inflorescences spicate, 2.5-8.5 cm, formed by clusters of 2 or 3 spikelets each separated by 2-17 mm. Spikelets mostly bisexual, ovoid, 3-4 mm, rarely basal one unisexual with a single male flower. Glumes ovate, keeled, both sides of midvein membranous with reddish brown lines, apex mucronate; basal 2 glumes empty; middle glume with a female flower; apical 1 or 2 glumes with a male flower. Male flowers: stamens 3; connective apex protruding, forming a thin tip. Female flowers: stigmas 3. Disk obscure. Nutlet white, subspherical, ca. 1 mm in diam., slightly 3-sided, transversely rugose, base with a brown stalk, apex tipped. Fl. and fr. Aug-Oct. 2n = 10.
Annual, caespitose. Culms 0.13-0.38 m tall, glabrous. Leaves 1-2 mm broad, glabrous or the sheaths minutely pilose towards the truncate or concave mouths. Inflorescence unbranched, 20-65 mm long, or with one short basal branch bearing a single glomerule. Glomerules 2-13-(18) of 1-7 sessile or subsessile spikelets. Bracts acuminate, shorter than or slightly exceeding the spikelets. Spikelets 4-5 mm long. Glumes 2.5-3.5 mm long, glabrous, mucronu-late, pale with red-brown striae, or wholly reddish-brown. Achene subglobose, 1.4-1.8 x 1.2-1.6 mm, glabrous, trabeculate to tuberculate-verrucose, grey possibly with brown stipe (only immature achenes seen).
An annual sedge. It has slender tufted erect stems 50 cm long with rigid flat leaves. A small 3 sided nut is produced on the flower at the top.
Inflorescence a simple 5–13 cm. long spike of 5–30 glomerules
Slender annual 45 cm. high;
Leaves 1–2 mm. wide
