Herbs perennial, efarinose, glabrous, base with few lanceolate to linear bud scales. Petiole winged, ca. 1/5 to as long as leaf blade; leaf blade elliptic-obovate to oblanceolate, 1.5--7 X 0.3--1 cm, tapering at base, margin nearly entire to remotely denticulate, apex subacute. Scapes 8--20 cm; umbels 1--6-flowered; bracts linear, 1--3.5(--5) mm, often slightly above base of pedicel. Pedicel 1--7 mm, elongating to 2.5 cm in fruit. Flowers heterostylous. Calyx tubular-campanulate, 6.5--8 mm, parted to 1/3 or near middle; lobes triangular, apex subobtuse. Corolla yellow, white, or purple, infundibuliform; tube 3--4 X as long as calyx, pubescent at mouth and inside; limb spreading, 2--3 cm wide; lobes obcordate to oblong, 7--8 mm, 2-lobulate. Pin flowers with stamens ca. 4 mm above corolla tube. Thrum flowers with positions reciprocal. Capsule ovoid, nearly as long as calyx. Fl. Jun-Jul.
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