Herbs perennial, efarinose, glabrous. Leaves forming a rosette; petiole indistinct to 1/3 as long as leaf blade; leaf blade oblanceolate to elliptic-obovate, 3--5 X 1.5--2 cm, base attenuate, margin regularly fine dentate, apex rounded to obtuse. Scapes 14--25 cm; umbels 1(or rarely 2), superimposed, 2--5-flowered; bracts purplish, linear-lanceolate, 3--5 mm. Pedicel 5--13 mm, elongating to 2 cm in fruit. Flowers heterostylous. Calyx campanulate, 6--7.5 mm, parted to 1/3 or slightly below, 5-veined; lobes purplish, triangular. Corolla yellow; tube 1--1.1 cm; limb to 2 cm wide; lobes broadly obcordate, 5--8 mm. Pin flowers: stamens near base of corolla tube; style ca. as long as calyx. Thrum flowers with positions reciprocal. Capsule globose, included in calyx. Fl. Aug. 2n = 22.
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