Herbs perennial. Basal bud scales ovate, 2--5 cm, usually pale yellow farinose. Leaf blade 6--10 X 2--6 cm at anthesis, enlarging to 20--30 cm at fruiting. Outer leaves oblong-oblanceolate to elliptic, base attenuate. Petiole of inner leaves broadly winged, ca. as long as leaf blade; leaf blade broadly ovate to deltoid, sparsely glandular or pale yellow farinose abaxially, base rounded to subrounded, margin sharply dentate to crenate, apex acute to subobtuse. Scapes 10--20 cm, elongating to 45 cm in fruit, farinose toward apex; umbels 5--12-flowered; bracts triangular to lanceolate, ca. 5 mm. Pedicel 1--2 cm, yellow farinose. Flowers heterostylous. Calyx campanulate, 4--5 mm, densely farinose, parted to 1/3; lobes triangular to subrectangular, apex acute to obtuse. Corolla deep purple; limb 2--2.5 cm wide; lobes obovate, glandular ciliate, emarginate. Pin flowers: corolla tube 1--1.1 cm; stamens ca. 4.5 mm above base of corolla tube; style ca. as long as tube. Thrum flowers: stamens toward apex of corolla tube; style slightly longer than calyx. Capsule disintegrating at maturity. Fl. May-Jun.
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