Leaf blades 4–8 x 2–5 mm., ovate, subacute to rounded at the apex, rounded at the base, often rather thick with only midrib visible, shortly ciliate around the margins but otherwise glabrous; petiole 0.5–1 mm. long; stipule sheath and lobe 0.4–1 mm. long, produced into 2 fimbriae 0.2–0.5 mm. long, ciliate.
Flowers heterostylous, 1–5, terminal or axillary, in fascicles without a common peduncle; pedicels 1–2 mm. lengthening to 7(14) mm. after flowering.
Style in short-styled flowers 0.1 mm. long, in long-styled flowers 1.2 mm. long; stigma lobes 0.1–0.2 mm. in diam., subglobose.
Prostrate short-lived perennial mat-forming herb, with ± glabrous or pubescent stems (2)10–30 cm. long rooting at the nodes.
Corolla white with pinkish-mauve limb or reddish green or pink; tube 0.2 mm. long; lobes 1.5 x 1 mm., triangular, glabrous.
Calyx tube 0.8 mm. long, obconic, glabrous or sparsely pubescent; lobes 1 x 0.5 mm., oblong-triangular.
Capsule 1 x 1.7 mm., ± glabrous, not beaked.
Seeds dark brown.