Perennial. Stems procumbent or rarely ascending, slender but not filiform, glabrous, (2)-5-10-(20) cm long; axillary fascicles of lvs present; adventitious roots sometimes present at nodes. Rosette lvs short-lived. Cauline lvs linear, hyaline at base, glabrous or with minute marginal cilia, aristate at apex, (3)-5-10-(15) × 0.2-0.5 mm. Fls small, 4-(5)-merous. Pedicels glabrous, (5)-10-15-(20) mm long. Sepals obtuse, glabrous, 1.5-2-(3) × 1-1.5 mm; hyaline margins always green. Petals very small to c. 3/4 length of sepals, rarely 0. Stamens 4-(5). Capsule ovoid, slightly > calyx; styles and valves 4-(5). Seeds brown, triangular- ovoid, papillate, 0.4 mm long.