Annuals, (2–) 3–9 (–15) cm tall, caespitose; rhizome absent. Cataphylls few, ±membranous. Leaves basal, usually 3–4 (–6) cm long, linear, ±canaliculate, c. 0.5 mm wide; sheaths with broad membranous margins; apex acute; auricles absent. Lower bracts 1–2, herbaceous, with the longer usually 0.8–1.2 (–4.0) cm long, overtopping inflorescence; middle bracts ±membranous, ±as long as the respective heads. Inflorescence composed of 1–2 (–4) usually 3–7 (–12)-flowered ±hemispherical heads, with one sessile, and the others on subequal peduncles c. 1–1.5 cm long. Flowers cleistogamous, rarely chasmogamous, usually trimerous. Tepals unequal; outer tepals longer, 3.0–4.5 (–6.0) mm long, oblong-ovate, keeled, long-acuminate, with midrib greenish to pale brown and broad membranous margins; inner tepals usually 2.2–3.6 (–4.0) mm long, ±subacute, mucronate, membranous. Stamens 3, 1/2–2/3 as long as tepals; anthers c. 0.2–0.5 (–0.6) mm long; filaments (0.6–) 0.8–1.3 mm long; style 0.3–0.5 mm (rarely to 1 mm) long; stigmas c. 1 mm long. Capsule broadly ovoid to ±ellipsoid, c. 1.7–2.2 mm long, much shorter than perianth, subobtuse, ±mucronulate, trilocular, ±castaneous-brown. Seeds ±obliquely ovoid, 0.25–0.35 mm long, c. 0.2 mm wide, pale brown, apiculate; appendages absent, transverse reticulation slight, ±rectangular. 2n = 18, fide S.Snogerup, Bot. Not. 116: 149 (1963).