Herbs perennial, with rhizomes. Leaves basal, few, leaf blade oblong to lanceolate, stipitate. Several to more than ten flowers form a head, which is enclosed in a bell-shaped involucre and usually grows on a long or short peduncle; Calyx tubular, shallowly trifoliate; Corolla white, tubular, with three lobes; Lateral staminodes petaloid, usually white, often larger than corolla lobes; The tip of the lip is 2-lobed, white and 3-loculed with many ovules. The fruit is a capsule; Seeds subglobose.