2n = 42

2n = 42

n = 32 bivalents, 34 bivalents, 45 bivalents, 47 bivalents, 48 bivalents, 50 bivalents

2n = 42, c. 84, 90

2n = 42, 70, 78, 94, 98

n = 47 bivalents, 49 bivalents

Small perennial herb forming small to large and extensive moss-like mats; stems prostrate, rooting at nodes, scarcely ascending at tips, much-branched. Lvs connate at base, 0.7-2.8 × 0.3-0.6 mm, c. 0.3 mm thick, linear-oblong or linear-lanceolate, flattened above, convex beneath; apex acute. Fls solitary in lf axils, star-like, 4-merous, 2.2-3 mm diam.; pedicels c. 0.5-1.3 mm long, elongating to c. 2 mm at fruiting. Calyx lobes 0.5-0.7 × c. 0.5 mm, broadly triangular-ovate, ± obtuse or apiculate. Petals 1-1.4 × c. 0.6 mm, narrowly elliptic-ovate, white with pink flush, subacute, > calyx. Scales 0.3-0.5 mm long, narrowly to broadly cuneate. Follicles smooth. Seed 0.4-0.5 mm long.

Small perennial herb forming small to large and extensive loose mats; stems prostrate, rooting at nodes, with very slightly ascending tips, much-branched. Lvs connate at base, 1.3-5 × 0.4-1 mm, 0.2-0.4 mm thick, lanceolate, linear- lanceolate, or elliptic-lanceolate, flattened or slightly concave above, convex beneath; apex sharply acute, shortly acuminate or apiculate. Fls solitary in lf axils, star-like, 4-merous, 1.8-2.5 mm diam.; pedicels 0.5-1 mm long, scarcely elongating at fruiting. Calyx lobes 0.8-1 × 0.4-0.6 mm, triangular or triangular-ovate, acute. Petals 1-1.3 × 0.5-0.7 mm, ovate or triangular-ovate, white or pink-flushed, acute or sharply acute, slightly > calyx. Scales c. 0.5 mm long, ± cuneate. Follicles smooth. Seed c. 0.5 mm long.