Herbs perennial, with stout woody rhizomes. Leaves basal, petiolate, usually minutely brown punctate. Scapes solitary in each rosette, without bracts. Flowers terminal, solitary. Calyx 5--7-lobed to base; lobes linear-lanceolate. Corolla infundibuliform, rarely campanulate to salverform, slightly zygomorphic, 5--7-lobed; lobes entire, emarginate or dentate at margin. Stamens 5--7, inserted on corolla tube; filaments glabrous or pubescent; anthers oblong to ovate, apex obtuse. Ovary ovoid, superior. Capsule oblong to cylindric, dehiscing by short valves.
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