Perennial herb forming small to large and extensive moss-like mats; stems almost prostrate except for slightly ascending tips, freely rooting at nodes, much-branched. Lvs connate at base, 0.5-2 × 0.2-0.5 mm, c. 0.2 mm thick, lanceolate-oblong, lanceolate-elliptic or oblanceolate, flattened above, strongly convex below; apex acute. Fls solitary in lf axils, star-like, 4-merous, 2.5-3.5 mm diam.; pedicels 0.5-3 mm long, elongating little at fruiting. Calyx lobes 0.4-0.6 × c. 4 mm, broadly ovate, obtuse or subacute. Petals 1-1.8 × 0.5-0.9 mm, broadly ovate or triangular-ovate, white, often flushed pink, obtuse, much > calyx. Scales c. 0.5 mm long, oblong-cuneate or oblanceolate. Follicles smooth. Seed 0.3-0.45 mm long.
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