Annuals, 3–20 cm tall, usually many-stemmed; stems thin, erect to ascending; plant base usually reddish. Basal leaves c. 2–10 cm long, c. 0.5–0.9 mm wide, canaliculate to subterete; cauline leaves 1–3. Basal bract leaf-like, usually 1–3.5 cm long; middle bracts membranous, short. Bracteoles ovate, obtuse, to c. 2 mm long, scarious. Inflorescence open, branched, to 10 flowers per branch; ultimate flowers usually in 2–3-flowered cluster; other flowers borne singly or less often approximated. Flowers chasmogamous or cleistogamous. Tepals unequal. Outer tepals ±broadly lanceolate, acute, 4.0–6.8 mm long; central band pale greenish or stramineous (to pale brownish). Inner tepals shorter, 3.3–5.3 mm long, usually obtuse, often ±mucronate; membranous margins broad. Stamens 6, less than 1/2 as long as tepals; anthers 0.4–0.8 mm long; filaments 0.7–1.5 mm long; style c. 0.3–0.4 mm long; stigmas c. 0.5–0.7 mm long. Capsule subcylindrical-subtrigonous, truncate to subtruncate-obtuse, 3.3–5.3 mm long, subequalling or exceeding inner tepals, usually deep brown when ripe. Seeds ±ovoid, 0.35–0.50 × 0.25–0.35 mm, almost smooth, indistinctly reticulate; appendages absent. 2n = 34, fide T.A.Cope & C.A.Stace, Watsonia 12: 127 (1978); S.Snogerup, in K.H.Rechinger, Fl. Iranica 75: 17 (1971); K. Mičieta & L.Mucina, Pl. Syst. Evol. 142: 139–140 (1983); T.A.Cope & C.A.Stace, Watsonia 15: 311 (1985).