Herbs perennial, with a short rootstock, base with few bud scales. Leaves forming a rosette; petiole usually nearly as long as leaf blade; leaf blade elliptic to oblong-elliptic or oblanceolate, 10--14 X 2--6 cm, copiously fugacious white farinose, base cuneate-attenuate, margin ± regularly crenulate, apex rounded to obtuse. Scapes 20--25 cm; umbels 1(or rarely 2), 2--6-flowered; bracts linear, 1--4 cm, apex acute. Pedicel 1--5 cm, elongating to 9 cm in fruit, ± farinose. Flowers heterostylous. Calyx green or blackish purple, 1--1.5(--2.5) cm, parted to near base; lobes spreading, lanceolate, copiously farinose inside. Corolla deep blue-violet; tube nearly as long as calyx; limb 2--3 cm wide; lobes oblong-elliptic to obovate, margin entire. Pin flowers: stamens at middle of corolla tube; style ca. as long as tube. Thrum flowers: stamens toward apex of corolla tube; style reaching middle of tube. Capsule nearly as long as calyx. Fl. Jul-Aug.
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