Prostrate or erect herb to 15 cm, annual, ?perennial. Indumentum of eglandular hairs. Leaves narrow-obovate to narrow-elliptic, 3.5–30 mm long, 1.5–8 mm wide, acute, glabrous, margin serrate, veins obscure. Stipules 1.2–2 mm long, c. 0.5 mm wide at base. Flowers 4–20 in dense fascicles; pedicel 0–2.5 mm long. Sepals 3 or 4, narrow-elliptic, 0.7–1.5 mm long, c. 0.3 mm wide, acute, glabrous, rarely pubescent, green or pink, margin broad, entire or fimbriate, keel absent. Petals 3 or 4, equalling sepals, erect at anthesis, elliptic, 0.7–1.5 mm long, 0.4–0.6 mm wide, obtuse. Stamens 3 or 4, 0.5–1 mm long; filament base slightly expanded to c. 0.1 mm. Capsule globular, 1–1.2 mm long, 0.8–1 mm wide, 3-or 4-locular; stigmas ± sessile. Seeds avoid or reniform, 0.3–0.4 mm long, c. 0.2 mm wide, brown, alveolate.
Grows in temporary freshwater swamps and claypans, intermittent watercourses and run-on areas, dune swales, Mulga-dominated red earth plains, and rarely near waterholes in rocky ranges composed of neutral or acidic rocks. Often in saline areas.
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