Rhizome short. Leaves basal, tufted, sessile, long linear, 30--50 cm × 3--8 mm, (5--)7--9-veined, base attenuate, margin serrulate distally. Scape 18--25 cm, slightly flattened and minutely winged. Inflorescence a reduced panicle, 5--7 cm, many flowered; bracts deltoid to ovate, basal one to 2 cm. Flowers in clusters of 2 or 3 or solitary; pedicel curved, 5--10 mm, articulate distally. Tepals purple, or white tinged with purple, oblong-ovate, ca. 5 × 2 mm, 1-veined. Filaments short; anthers oblong. Style 5--6 mm, slender. Seeds purple-blue at maturity, ellipsoid or globose. Fl. and fr. Aug--Oct.

* Forests, hillsides along streams, moist places. Guangxi, Hainan.