Annual herb, erect, to 19 cm high, glabrous. Leaves widely spaced, elliptic, narrowly elliptic or narrowly oblanceolate, 4–10 mm long, 0.8–3 mm wide. Inflorescences of axillary and terminal few-to many-flowered umbellate clusters; peduncles to 50 mm long. Involucre 8-or 9-veined; tube 2–3.5 mm long; lobes 0.6–2 mm long. Corolla tube 1.5–2.5 mm long; lobes 0.7–2.8 mm long. Stamens 1–1.5 mm long; anthers minutely apiculate. Styles connate. Capsule 2.1–4 mm long. Seeds brown or grey, finely reticulate.