Herbs perennial, stout. Leaves forming a rosette; petiole 3--30 cm; leaf blade broadly ovate-oblong to elliptic, 3--15(--20) X 4--11(--15) cm, thin papery, glabrous, abaxially sparsely minutely glandular, base cordate, margin hydathode-dentate, apex rounded. Scapes robust, 30--120 cm, glabrous or occasionally scarcely farinose toward apex; umbels (10--)15--30(--80)-flowered; bracts broadly lanceolate to oblong, 1--3 cm, often dentate, gibbous at base. Pedicel 2--10 cm, ± yellow farinose. Flowers heterostylous. Calyx campanulate, 8--10 mm, copiously yellow farinose, parted to ± 1/3, obscurely 5-veined; lobes triangular, apex acute. Corolla yellow, often becoming green when dry, 1.7--2.5 cm; limb 1--2 cm wide; lobes obovate-oblong to broadly obovate, slightly emarginate. Pin flowers: corolla tube slightly longer than calyx; stamens ca. 2.5 mm above base of corolla tube; style ca. as long as tube or slightly exserted. Thrum flowers: corolla tube ca. 2 X as long as calyx; stamens toward apex of corolla tube; style ca. 1.5 mm. Capsule cylindric, slightly longer than calyx. Fl. Jun-Jul, fr. Jul-Aug. 2n = 22@.
Home