Annuals, 2–4 (–6) cm tall, dwarf, slender. Leaves basal, filiform, usually 1–2 cm long, canaliculate; base ±dilated with broad membranous margins, ±purplish; inner leaves with sheath-like base; margins membranous; apex acuminate; auricles absent. Stem filiform, smooth, 0.1–0.2 mm in diam. Lower bracts ovate to narrowly lanceolate, brownish membranous to brown, 1.5–2.5 (–3.2) mm long, shorter than inflorescence; lowermost bract often ±erect. Inflorescence a single (very rarely 2) pseudolateral or terminal 1–5-flowered head to 6 mm diam. Tepals unequal; outer tepals subacute to mucronate; inner tepals longer, 2.2–2.6 mm long, ovate, obtuse, usually ±involute above, pale castaneous brown; central band and/or margins darker; midrib smooth to ±scabrid. Stamens 3, much shorter than perianth; anthers 0.3–0.4 (–0.6) mm long; filaments (0.4–) 0.5–0.7 mm long; style 0.2–0.3 mm long; stigmas c. 0.5 mm long, patent-recurved, not exserted. Capsule oblong-obovoid, subtrigonous, subobtuse, ±mucronate, c. 1.5 mm long, shorter than perianth, pale brown to brown. Seeds ovoid, c. 0.3 × 0.2 mm, pale brown, inconspicuously reticulate; appendages absent.