A mat-forming, prostrate, much branched woody perennial. Stem diffusely branched from woody rootstock, young branches sparsely hairy, older ones glabrous. Leaves 3-costate, elliptic to broadly elliptic, 4-18 (-20) mm long, 2-9 (-10) mm broad, glabrous except the scattered hairy costae, plicate in bud, crenate-serrate, without basal setose appendages, obtuse; petiole 1.5-2.5 cm long, filiform, minutely hairy; stipules linear-falcate, c. 2 mm long. Cyme mostly 2(-1)-flowered, antiphyllous, peduncle minute. Flowers yellow, 6-8 mm across, pedicel c. 1 mm long; bracts linear-lanceolate, c. 1.5 mm long. Sepals yellowish-green, linear-oblong, 3-4 mm long, spreading, acute. Petals obovate-spathulate, as long as sepals, obtuse. Stamens 8-10, filaments c. 4 mm long, erect. Carpels 4; ovary c. 1 mm long, oblong-cylindric, 4-loculed; style equalling the ovary, stigma 4-lobed. Capsule oblong-cylindric, straight or curved, glabrescent, 7-22 mm long, with c. 1.5-2 mm long beak, 4-loculed, locules transversely septate. Seeds blackish-grey, c. 1.5 mm long, roughly triangular, obliquely truncate.