Hypaelyptum microcephalum R. Brown, Prodr., 220. 1810

Culms 7–35 cm × 0.5–0.8 mm. Leaves longest involucral leaf spreading to reflexed, 3–10 cm × 1.5–1.7 mm. Inflorescences: spikes (1–)2–4(–5), ovoid, 2–8 × 2–4 mm; bracts 2–3, 1–13 cm × 1–2 mm. Spikelets: floral scales 2–3; 1st scale obtrullate, 1–1.8 × 0.2–0.3 mm, apex acuminate, outward curving 0.2–0.3 mm; 2d scale sometimes absent, oblong, 0.6–1.1 × 0.2 mm; 3d scale sometimes absent, oblong, 0.6–1 × 0.2 mm; stamens 1–2; anthers 0.25 mm; stigmas 2. Achenes narrowly ellipsoid to obovoid, terete, 0.7–1 × 0.15–0.20 mm, 3.5–5 times long as wide.

Fruiting summer. Wet, disturbed sites in pinelands; 50 m; introduced; Ala., Fla.; Asia; Australia.