Loosely matted, prostrate perennial, almost completely glabrous. Stems rooting at nodes and continuing to grow beyond the flowering region. Leaves opposite, usually narrowly ovate, occasionally narrowly lanceolate or ovate, 4–13 mm long, tapering rather variably, petiolate at the base, entire or with a few minute teeth. Flowers with inner surface of hypanthium glabrous. Petals to 7.4 mm long, white. Capsule 1.5–3 cm long; pedicel to more than 6 cm long. Seeds narrowly obovoid, 1.1–1.2 mm long, comose.
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