Herbs, decumbent, rooting at nodes. Leaves 2-ranked; blade lanceolate-elliptic to ovate-lanceolate, 2.5--5 ´ 1--2 cm (distal leaf blades wider or narrower than sheaths when sheaths opened, flattened), margins ciliolate, apex acute, glabrous. Inflorescences terminal, becoming leaf-opposed, sometimes axillary from distalmost leaf axil, 1--2 cyme pairs per stem; bracts mostly foliaceous, occasionally reduced. Flowers distinctly pedicillate; pedicels 1--1.5 cm, glandular-pilose; sepals 5--7 mm, midrib pilose with eglandular hairs; petals distinct, white, not clawed, 8--9 mm; stamens free; filaments white, densely bearded with white hairs.
Perennial herb with decumbent, slender, leafy stems, rooting at nodes. Flowers actinomorphic. Inflorescence terminal. Petals ovate, ± 8 mm long. Leaves ovate-acuminate, abruptly narrowed into a short, broad, open, ciliate sheath. Weed. Flowers white.
Glabrescent herbs with decumbent, slender, leafy stems, rooting at nodes. Leaves distichous, ovate-acuminate, abruptly narrowed into a short, broad, open, ciliate sheath, c. 25-40 x 15-20 mm, often with white and purple stripes, purple below. Flowers in pairs of few-flowered cymes, terminal and/or terminating abbreviated side branches; each pair of cymes subtended by 2 leaf-like subequal bracts, pedicels c. 10 mm. Sepals ovate-acuminate, with a ciliate keel, c. 6 mm long, green. Petals ovate, c. 8 mm long, white. Stamens 6, with filaments c. 8 mm long, bearing long beaded hairs in lower half; anthers with an obtriangular connective, locules spreading outwards towards apex. Ovary 3-locular, oblong-globose, with 2 ovules in each locule; style terete or somewhat swollen in middle, stigma capitate. Capsule 2 mm long, chartaceous; seeds reticulate, hilum linear.