Herbs perennial, efarinose, lacking basal bud scales. Leaves forming a rosette; petiole broadly winged, not enveloped at base, nearly as long as to slightly shorter than leaf blade; leaf blade oblong to oblanceolate, 10--25(--30) X 2--4 cm, glabrous, minutely brownish punctate, base attenuate, margin erose-dentate, apex obtuse to acute. Scapes 20--38 cm; umbel solitary, 6--14-flowered; bracts acuminate-subulate, 0.8--1.5 cm, base cuneate. Pedicel 1.5--3 cm. Flowers heterostylous. Calyx tubular, 1.2--1.4 cm, brown punctate, parted to middle or slightly below; lobes oblong to lanceolate. Corolla pale yellow; limb 1.5--1.8 cm diam.; lobes oval to suborbicular, 7--9 X ca. 6 mm, often with reddish blotches, apex rounded. Pin flowers: corolla tube ca. as long as calyx; stamens at middle of corolla tube; style ca. as long as tube. Thrum flowers: corolla tube slightly longer than calyx; stamens toward apex of corolla tube; style reaching middle of tube. Capsule cylindric, longer than calyx. Fl. Jun.
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