Plants 20-60 cm tall, glandular pubescent except for leaves. Roots fleshy, terete, 1.5-2 cm in diam. Rhizomes stout, terete. Stems mostly branched. Petiole 2-7(-13) cm; leaf blade deltate or ovate-deltate, sometimes ovate, 4-9 × 4-8 cm, base cordate, truncate or decurrent into petiole, with a few, coarse deltate teeth, apex acute, glabrescent. Inflorescences terminal or axillary, umbellate; bracts scalelike. Pedicel 3-5 mm. Calyx funnelform to campanulate, ca. 6 × 4 mm. Corolla green-yellow, pale purplish at base, funnelform to campanulate, ca. 1 cm; lobes ovate, ca. 1/3 as long as tube. Stamens somewhat unequal, included. Style nearly as long as corolla. Fruiting calyx inflated, funnel- form, 1-1.8 × 1-1.5 cm, membranous, with 10 indistinct longitudinal veins. Capsules subglobose, ca. 5 mm in diam. Seeds pale orange-yellow, reniform, somewhat compressed. Fl. Mar-May, fr. Apr-Jun.

A source of tropane alkaloids.

* Valleys, forests; 800-1600 m. S and W Henan, Shaanxi (Qinlin mountains), S Shanxi