Annuals, to (6–) 10 cm tall, single-stemmed to caespitose. Basal leaves sometimes reduced to sheaths, usually 2–4 cm long, 0.3–0.7 mm wide, flat to subterete, acute; cauline leaves ±absent. Basal bracts leaf-like; upper bracts scarious, broadly ovate. Bracteoles scarious, broadly ovate, subacute to obtuse, 0.8–2.0 mm long. Inflorescence a single simple sickle-shaped cyme or several loosely branched unilateral cymes with remote individual flowers; pedicels c. 0.1–0.3 mm long. Flowers sometimes cleistogamous. Tepals ±unequal. Outer tepals (2.5–) 3.0–4.0 (–5.0) mm long, lanceolate to narrowly ovate, apiculate; central band greenish or stramineous; margins broad, membranous. Inner tepals (1.7–) 2.0–3.0 (–4.0) mm long, ±narrowly ovate. Stamens 6, less than half as long as tepals; anthers 0.35–0.55 mm long; filaments c. 1 mm long; style 0.2–0.3 mm long; stigmas recurved, 0.4–0.6 mm long. Capsule ellipsoid, slightly subtrigonous above, c. 2.0–3.0 mm long, shorter than outer tepals, ±equalling inner ones, obtuse. Seeds 0.45–0.55 × 0.25–0.30 mm, obliquely ovoid, with dark apices, with prominent reticulation of 11–14 longitudinal ridges and 30–40 thinner transverse ones; appendages absent. 2n = 30, fide S.Snogerup, in K.H.Rechinger, Fl. Iranica 75: 20 (1971).