Annuals 8–15 cm tall, roots fasciculate, thin. Leaves basal and cauline, subcanaliculate to almost flat, less than 1.5 mm wide in our material, apex acute, sheath margin membranous, gradually narrowing, auricles absent. Basal bract leaf-like, shorter than inflorescence. Inflorescence terminal, lax; branches ± straight, often erecto-patent to almost patent; flowers solitary or in 2–3-flowered clusters, each supported by a pair of ovate translucent whitish-yellowish bracteoles 1.1–1.4 mm long. Tepals subequal, narrowly lanceolate, acute to acuminate, with broad, almost transparent, scarious to membranous margins, middle part adaxially dark castaneous-brown to blackish brown, abaxially initially greenish, later pale stramineous or silvery-stramineous, outer middle stripe narrower than the inner and therefore distinctly blackish bordered, outer tepals 3–4 mm long, ca. 1 mm wide, middle stripe ca. 0.4 mm wide adaxially, inner tepals 2.5–3.7 mm long. Stamens 6, anthers usually 1.5–2.0 mm long, 3–5 × as long as 0.4–0.55 mm long filaments; style (including young capsule mucro) usually 0.5–0.8 mm long, stigmas usually erecto-patent, 0.8–1.3 mm long. Capsule ovoid, indistinctly trigonous above, trilocular, castaneous-brown, subequalling or shorter than perianth, 2.3–3.0 mm long, abruptly narrowed in a mucro 0.2–0.3 mm long. Seeds pale brownish, broadly ovoid, 0.35–0.40 mm long, 0.28–0.32 mm wide, smooth (without visible striation), glossy.