Herbs perennial, ca. 1 m tall, pale brown pubescent. Roots fleshy, 1-2 cm in diam. Leaves 1-pinnately divided, mostly borne below middle of stem, 12-27 cm; lateral leaflets 6-9 pairs, sessile, elliptic-lanceolate, 5-9 X 1.5-3 cm, margin serrate, pubescent on veins. Inflorescences racemose, 5-12-flowered; bractlets linear, 1-1.5 cm. Pedicel 5-10 mm. Calyx campanulate, green with purple spots, veins dark purple, 1.5-3 cm; teeth broadly triangular, 5-10 mm, apex acute. Corolla yellow, purple spotted and striate at base, 5-6(-8) cm, mouth ca. 3 cm in diam.; tube ca. 4 cm; lobes rounded, 1.5-2 X 2-2.5 cm, glandular. Staminode ca. 1 mm; filaments and anthers pale yellow. Capsule pale brown, lanceolate, ca. 10 X 1.3-1.5 cm, 6-angled, woody, apex acuminate. Seeds pale yellow-brown, ovoid or globose, 4-4.5 X 3-4.5 mm, apex rounded or emarginate, usually gray pubescent; wings ca. 1 mm wide. Fl. May-Aug, fr. Sep-Nov.
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