Annuals, (10–) 20–30 (–45) cm tall, robust, caespitose, with erect or ascending stems. Basal leaves light green, to 20 cm long, c. 1.5–4.0 mm wide, flat; cauline leaves 1–2; auricles absent. Basal bract leaf-like; upper bracts mostly scarious. Bracteoles ovate, scarious, c. 1.5 mm long. Inflorescence lax; branches straight, often erecto-patent to almost patent; many-flowered; flowers in 1–3 (–5)-flowered clusters. Tepals unequal; central band pale green to stramineous, bordered with brown to blackish line; margins membranous; outer tepals 4.5–6.5 mm long, lanceolate, acute; inner tepals subacute to acute, c. 3.5–5.5 mm long. Stamens 6, shorter than perianth; anthers 0.9–2.0 mm long, longer than 0.4–0.8 mm filaments; style 0.2–0.45 mm long; stigmas recurved, to 0.5 (–1) mm long. Capsule obovoid, 3.7–5.3 mm long, equalling inner tepals, subobtuse to subacute. Seeds obovoid, 0.45–0.65 × 0.25–0.40 mm, truncate at one end, distinctly reticulate with 20–25 prominent longitudinal ridges and weaker transverse striae. 2n = 26, fide T.A.Cope & C.A.Stace, Watsonia 12: 120 (1978); T.A.Cope & C.A.Stace, Watsonia 15: 311 (1985).