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Perennial herb, tufted, 0.22-1.50 m high. Leaves with sheaths shining brown to blackish; blades 0.8-1.2 mm wide, channelled at base (C-shaped), solid, 3-angled towards apex. Culm scapose, terete, 1.0-1.7 mm in diam. Inflorescence head-like, ± 15 mm in diam., of up to 15 spikelets. Subtending bracts 2, erect, with brown, dilated bases partly enveloping inflorescence. Spikelets lanceolate, ± 12 mm long, lower 1-3 flowers bisexual, upper male. Glumes 2-ranked, lanceolate, 8-9 mm long, keel minutely scabrous towards apex, non-excurrent. Perianth of 3-5 minute bristles or absent. Flowering time July-Oct. Nutlet sessile or stalked, elliptic, 1.8 mm long, 3-angled, shining, white, surface smooth.
Tufted, perennial herb, up to 1.5 m high. Stems and leaves bright, dark green. Flowers: inflorescence a terminal, bracteate head, reddish brown; Oct. Fruit a sessile or stalked nutlet.
Perennial herb, up to 300 mm tall. Tufted. Stems and leaves bright, dark green. Inflorescence a terminal, bracteate head, reddish brown. Achene sessile or stalked.
Tufted perennial, 20-50 cm. Spikelets brown.
