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Perennial, or sometimes annual. Culms tufted, usually densely, very slender, wiry, up to 60 cm tall. Basal leaf sheaths disintegrating into fibers; leaf blades very narrowly linear, 1–6 cm, ca. 1 mm wide, adaxial surface usually with long scattered hairs, margins scabrous, midrib and submarginal veinsthickened, apex obtuse; ligule 0.1–0.3 mm. Raceme (3–)5–20(–25) cm, falcate when dry; rachis shortly ciliate on margins or glabrous. Spikelets light green, lanceolate, 1.6–4 mm, acute; lower glume slightly asymmetrical; lemma 1.5–3 mm, mucronate. Caryopsis ca. 1 mm. Fl. and fr. Jul–Oct.
Loosely caespitose annual growing in individual tufts, rarely forming mats; culms 5–50 cm. high, 2–8-noded, the leaves usually spread over the entire length.. Leaf-blades flat or folded along the midrib, 1–8(–11) cm. long, mostly 0.3–1.75 mm. wide, tapering to an abrupt point; sheaths not splitting into fibres.. Spikes 1.4–15 cm. long, the rhachis 0.6–0.9(-1.1) mm. wide.. Spikelets 1.7–2.9 mm. long; anthers 0.3–0.7 mm. long.. Caryopsis 0.9 mm. long.. Fig. 88/11, 12.
Loosely caespitose annual growing in isolated tufts, rarely forming mats; culms up to 50 cm tall, leafy throughout; leaf sheaths remaining intact; leaf laminas 1–8(11) cm × up to 1.75(rarely to 4.5) mm, usually filiform, sometimes flat.
Spikelets 1-flowered, 1.6–2.1(3) mm long; lemma 1.3–1.8 mm long; anthers 0.2–0.4 mm long, rarely up to 1.2 mm.
Raceme 1.5–15 cm long, very slender, straight or curved, glabrous at the base.
5–26 cm. high, weakly ascending or straggling
Caryopsis c. 0.9 mm long.
