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Perennial herbs, evergreen, glabrous. Rhizomes woody, branched, creeping, with ovate pinnately veined scales. Leaves numerous, radical or rosulately arranged at end of rhizome, long petiolate. Scape solitary or 2–6, in the axil of the upper leaves, elongated after flowering, with several bracts. Flowers solitary, subterminal, erect or nodding. Calyx persistent. Corolla campanulate to funnel-shaped; lobe obtusely toothed to laciniate, undulate to crenate. Stamens adnate to base of corolla tube; filaments short or none; staminodes 5 or absent. Ovary and capsule 3-locular.
Cal deeply cleft; cor open-campanulate, cleft to the middle or below; stamens distinct; 5 small, scale-like staminodia incurved over the ovary; anthers inflexed, with 2 pollen-sacs; style filiform; stigma obscurely 3-lobed; capsule ovoid; evergreen, rhizomatous, perennial herbs with long-petioled basal lvs and erect scapes bearing (in our sp.) a rather large, solitary fl. 8, the others e. Asian.
