Delicate annual herb with spreading or prostrate often reddish branches up to c. 7 cm. long and 1 mm. in diam. Leaves opposite, fleshy, 2–4 × 1–2 mm., elliptic to broadly elliptic or broadly ovate, apex obtuse; stipular hairs fairly numerous, c. 2 mm. long. Flowers solitary or 2–3 together at the ends of the branches, surrounded by a cluster of apical leaves and hairs equalling the length of the leaves. Sepals up to 3 mm. long, ovate, acute at the apex, pale and rather thin-textured. Petals 4, purplish or white, 1–1·5 mm. long, united to about half-way. Stamens 4, alternating with the petals. Ovary ovoid; style c. 0·5 mm. long, with 4 stigmas. Capsule c. 2 mm. long, ovoid-globose, dehiscing horizontally below the middle. Seeds many, grey, c. 0–5 mm. in diam., reniform, somewhat laterally compressed, with concentric lines of minute blunt tubercles.