Herbs perennial, efarinose, glabrous. Leaves forming a rosette; petiole slightly differentiated to 1/3 as long as leaf blade; leaf blade oblong to elliptic-obovate, 6--12 X 1.8--5 cm, base attenuate, margin erose-denticulate, apex rounded. Scapes 12--25(--45) cm; umbels 1 to several, superimposed, (3--)5--10-flowered; bracts linear-lanceolate, 3--10 mm. Pedicel 0.8--2 cm, elongating to 3 cm in fruit. Flowers heterostylous. Calyx tubular-campanulate, parted 1/3--1/2, 5-ribbed; lobes triangular, margin hydathode-apiculate at apex. Corolla yellow; limb 1.8--2.5 cm wide; lobes broadly obovate, margin entire to emarginate at apex, usually with a deep yellow stripe from base to apex. Pin flowers: corolla tube 8--10 mm, gradually expanded upward; stamens 3--4 mm above base of corolla tube; style exserted. Thrum flowers: corolla tube ca. 9 mm, abruptly expanded at insertion of stamens (near annulus); style ca. 2.5 mm. Capsule ovoid, nearly as long as calyx. Fl. Jun, fr. Sep. 2n = 22@.
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