Perennial herbs, erect, glabrous. Stems leafless. Leaves all basal, spirally arranged, linear or with reduced blade; stomata restricted to 2 narrow bands of lighter color, one on each side of the midrib. Flower bracts 2, with the longer one erect to suberect, much exceeding the flower, and the other ±equalling tepals. Flower terminal (pseudolateral), single, large, hermaphrodite. Tepals castaneous-brown to dark brown; margins membranous, distally involute. Stamens 6; anthers linear; connective with apical mucro to 0.5 mm. Ovary sessile. Style with 3 tapering twining stigmas. Capsule subglobose, unilocular or slightly triseptate, sessile. Seeds many, ±ovoid; appendage absent; base with a paler patch or apiculate; seed-coat with fine longitudinal pattern, with cells narrow elongated and pointed.