Perennial herb forming small to very large and extensive loose or dense mats, sometimes to many m diam.; stems decumbent, rooting at nodes, ascending at tips, much-branched. Lvs connate at base, very variable, 2-12 × 1.2-3.4 mm, c. 0.7 mm thick, narrowly oblong-spathulate or narrowly oblong-elliptic, sometimes elliptic, flattened above, weakly convex beneath; apex obtuse. Fls solitary in lf axils, star-like, 4-merous, 4-6 mm diam.; pedicels 1-3 mm long at anthesis, not elongating at fruiting. Calyx lobes 1-1.8 × 0.5-0.6 mm, ovate or triangular-ovate, obtuse. Petals 2-3.5 × 1.2-1.7 mm, broadly obovate-elliptic to suborbicular, white or white with pink flush towards base, obtuse, much > calyx. Scales 0.8-0.9 mm long, oblong-cuneate to almost linear and only slightly wider towards apex. Follicles smooth. Seeds 0.5-0.7 mm long.
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