Slender shrub with trailing to ascending branches to c. 1.5 m long; stems glabrous and minutely tuberculate or with short stiff hairs and setae to 1 mm long. Leaves mostly alternate, occasionally the lower ones opposite or in whorls of 3, narrow-deltoid to suborbicular, 5–12 mm long and wide on lower stems, reduced in flowering region, acute or obtuse, margins flat or recurved, toothed, usually undulate, surfaces glabrous or with a few fine, stiff hairs particularly near margins. Inflorescences 1–3-flowered; peduncles 4–12 mm long, with dense, sometimes gland-tipped setae. Sepals broad-ovate, c. 2 mm long, deciduous; petals c. obovate, 8–13 mm long, deep lilac-pink, rarely white, deciduous; ovary glandular-hairy, ovules 4. Fruit ovate, narrow-trapeziform or elliptic, 5–10 mm long, beaked; seeds obovoid, c. 2.5 mm long. Flowers Jul.–Jan.