Dwarf shrub, 0.1–0.25 m tall, with stems rather stout to slender, erect to decumbent, branching strictly or divergently at base, with branches ascending to strict along stem, without short axillary shoots. Stems 4-lined, eglandular; internodes 2–10 mm, all (sometimes except uppermost) shorter than leaves. Leaves 4-verticillate, spreading, c. 0.5 mm petiolate, glaucous beneath, (8–)10–14 × c. 1 mm, narrowly linear, apex rounded, margin revolute, base cuneate, 1-veined; laminar glands pale, scattered; intramarginal glands not seen. Inflorescence 3–c. 25-flowered, from 1–2 nodes, lax, broadly pyramidal to corymbiform, 10–40 mm long,without subsidiary branches below; bracts and bracteoles reduced-foliar, entire. Flowers 12–15 mm in diam., buds globose. Sepals equal, basally slightly united, not imbricate, 1–1.5 × 6–8 mm, broadly elliptic to obovate, obtuse to rounded; veins 3, not prominent; margin entire, eglandular; laminar glands pale, linear. Petals bright yellow, not tinged red, deciduous, 7–8(–9) × 2–3 mm, c. 6 × sepals, narrowly oblanceolate toobovate-oblanceolate; marginal glands pale, 1–3, sessile or subsessile, minute; laminar glands pale, few, shortly striiform or absent. Stamens c. 35, longest c. 7 mm, deciduous, c. 0.85 × petals. Ovary 2 × 1 mm, ellipsoid; styles 3 mm, 1.5 × ovary. Capsule 5 × 3 mm, ovoid; valves with or without swollen interrupted dorsal vittae, with oblique swollen lateral vittae or vesicles. Seeds reddish-brown, 1.2–1.5 mm long, cylindric, papillose.