Stems slender, ± flaccid, up to ± 40 cm. long, sparingly branched, rooting at lower nodes, then ascending; branchlets ascending, very slender, pale, sparsely pubescent, becoming glab. Lvs opp., floral alt., ± distant, internodes up to 4 cm. long; petioles very short, up to 2 mm. long; lamina (5)-10-(20) × (5)-8-10 mm.; ovate to broad-ovate or ovate-oblong, thin, membr., glab. or nearly so; entire or obscurely sinuate with very few denticles. Fls ± 4-5 mm. diam.; calyx-lobes oblong-lanceolate, apiculate, < petals; petals white. Capsules 25-50 mm. long, slender, sparsely pubescent to glabrate; peduncles ± 6 cm. long, slender, glab. Seeds smooth.

n = 18

2n = 36

Loosely matted flaccid herb 3-40 cm tall, often much-branched, creeping and rooting near base. Stems strigillose all round at least in upper portions, also with glandular hairs in infl. Lamina of lf narrowly to very broadly ovate, 0.4-2.6 × 0.4-1.4 cm. Floral tube 0.9-1.2 mm deep, glandular and strigillose. Petals white, 3.3-6.2 × 1.6-3.5 mm. Capsule sparsely strigillose and with glandular hairs, 2.5-5.5 cm long; fruiting pedicel 0.5-6.5 cm long.