Description from Flora of China
Herbs perennial, shortly rhizomatous, often stoloniferous. Roots sometimes with fleshy, tuberous part near tip. Leaves basal, tufted, sessile, grasslike or narrowly linear. Scape simple, naked, terminating in a reduced panicle. Flowers bisexual, often in clusters of 2--4, sometimes solitary, small, subtended by a bract and a few bracteoles; pedicel articulate. Tepals 6, free. Stamens 6, inserted at base of tepals; filaments narrowly linear; anthers basifixed. Ovary superior, 3-loculed; ovules 2 per locule. Style columnar, slightly 3-angled; stigma small. Fruit bursting irregularly at an early stage and exposing young seeds. Seeds deep blue to purple at maturity, berrylike, globose or ellipsoid.
About eight species, E Asia, extending to Japan, the Philippines, and Vietnam; six species (three endemic) in China.
(Authors: Chen Xinqi (陈心启 Chen Sing-chi); Minoru N. Tamura)