Herbs perennial. Stems ascending or semidiffuse, quadrangular, ca. 10 cm tall, slender. Leaves imbricate, oblong-lanceolate, 1--1.1 cm, glabrous, smooth, apex slightly obtuse. Flowers solitary, rarely 2, terminal; bracts ovate, membranous. Pedicel short. Sepals 5, ovate, ca. 5 mm, margin broadly membranous. Petals 5, slightly longer than sepals, 2-cleft; lobes ovate-oblong. Capsule cylindric, ca. 1.5 × as long as persistent sepals, tuberculate at maturity, apex acuminate. Seeds orbicular-reniform, ca.1.2 mm, slightly rugulose. Fl. Jun--Jul.
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