Prostrate, often reddish annual, stems to c. 15(–c. 30) cm long, simple or few-branched. Leaves basal and at least on lower part of flowering stems, narrowly obovate to oblong, often semi-terete, the largest 1–4 cm long, 2–5 mm wide, subsessile, glabrous. Cymes elongating, c. 3–10-flowered; bracts opposite; pedicels 2–5 mm long at anthesis, elongating to c. 1 cm in fruit; sepals broadly ovate, 2–3 mm long, acute (rarely obtuse), persistent; petals 5, not or barely exceeding sepals, pale pink; stamens 5–7; style trifid to base. Capsule ovoid, 2.5–3.5(–4) mm long, pale, splitting to c. midway or slightly below into 3 valves; seeds 10–20, almost circular, c. 0.7 mm diam., shining red-brown to blackish, virtually smooth. Flowers mainly Sep.–Nov.