Description from Flora of China
Trees, to more than 10 m tall; crown broadly conical; many parts stellate tomentose. Young branches brown, with convex lenticels. Leaf blade often ovate-cordate, to 34 cm, abaxially densely sessile dendroid hairy, adaxially glabrescent, base cordate to subrounded, margin usually entire, sometimes irregularly angled or lobed, apex gradually attenuate and acute. Thyrses pyramidal to narrowly conical, ca. 30 cm; cymes 3-5-flowered; peduncle 0.8-2 cm, almost as long as pedicels. Calyx obconical 1.6-2 cm; tube glabrescent; lobes 5, to 1/3 of calyx length. Corolla purple to pinkish white, funnelform-campanulate, 7-9.5 X 4-5 cm, slightly curved, ridged ventrally, outside glandular and stellate hairy, inside glabrous and purple spotted; limb 4-5 cm in diam. Stamens to 2.5 cm. Ovary and style glandular; style 3-3.5 cm. Capsule ovoid, rarely ovoid-ellipsoid, 3.5-5 cm, stellate tomentose; persistent calyx disc-shaped; beak 4-5 mm; pericarp 1-2.5 mm. Seeds 4-5 mm including wing. Fl. Apr-May, fr. autumn.
* Wild or cultivated; low elevations. Anhui, Hebei, Henan, Hubei, Jiangsu, Shaanxi, Shandong, Shanxi.