Creeping herbs, rooting at nodes. Stems up to 30 cm long, antrorse strigose, finally glabrescent. Leaves ovate or elliptic, (0.4-)0.8-2.2 by (0.2-)0.4-l cm, sometimes slightly asymmetric, base rounded, abruptly tapering into the 1-2 mm long, sheathing, often twisted petiole or sessile, lateral nerves 1 or 2 on either side of midrib, leaves antrorse strigose on both side, more patent on upper side, denser on midrib below. Flowers solitary, extra-axillary; pedicels 3-4 mm long in flower, 7-12 mm in fruit, antrorse strigose. Calyx 1.5-2.5 mm in flower, up to 3 mm in fruit, antrorse hairy on the whole surface or along midrib of lobes only, lobes ovate-lanceolate to ovate, c. 1.5 mm long, 1 mm wide, acute to acuminate, with a black, linear gland outside below tip. Corolla white with yellow throat, 4-5 mm across, lobes obovate; fornices kidney-shaped, finely ciliate. Stamens c. 1 mm long, anthers 0.5 mm. Pistil: style c. 1 mm long. Nutlets 4, pyramidal, dorsally convex, ventrally with a sharp angle, 2-3 mm long, 1-1.5 mm wide, brownish black, with 3 narrow, acute crests.
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