Almost glabrous, ± prostrate, mat-forming, perennial herb, with stems rooting freely at nodes. Lvs opposite, with short petiole 2-4 mm long, spaced but imbricate along stems and also forming a terminal rosette; lamina to 2.3 × 2.2 cm and c. 1 mm thick, obcuneate to broadly obovate, somewhat concave above and convex beneath, green, glabrous but often ± papillate; distal part of margin shallowly crenate, otherwise entire; apex rounded. Infl. terminal on an erect, puberulent rachis to c. 3 cm high at flowering, afterwards elongating to c. 12 cm; cyme 3-5 cm across, corymbose, with 2-4 branches, each branch with a few fls; bracts leaflike at base, smaller higher up infl. Fls fairly numerous, on very short broad pedicels, secund. Sepals equal, 4-5.5 mm long, narrowly triangular or triangular-lanceolate. Petals 5, almost patent, 9-13 × 1.5-2 mm, ± lanceolate, pale pink or white with pink outside, becoming rose, acute. Stamens 6-8.5 mm long, whitish to pink, darkening with age. Carpels and styles white, becoming rose or crimson after anthesis. Scales semi-lunate or almost cup-shaped, sometimes retuse. Follicles crimson, slightly divergent. Seed c. 1 mm long, obovoid, with prominent longitudinal ribs.