Description from Flora of China
Rehmannia integra H. L. Li, Taiwania 1: 80. 1948.
Herbs, 30-40 cm tall, white lanuginous or glabrescent. Branches thick, pendulous. Basal leaves petiole 5-8 cm; leaf blade ovate-oblong, 5-9 X 3-5.5 cm, base truncate to rounded, margin entire or subentire, apex rounded. Stem leaves petiole ca. 2.5 X 1.5 cm; leaf blade similar to basal leaves, smaller. Pedicel 5-10 mm. Calyx tubular-campanulate, ca. 7 X 7 mm, 10-ribbed; lobules irregular, linear, ca. 7 mm, apex acuminate. Corolla ca. 5 cm, glandular pilose; tube 4-4.5 cm; limb 2-lipped, ca. 2.8 cm in diam., lower lobes subequal, rounded; upper lip longer than lower lip, 2-lobed. Stamens included, glabrous; anthers ca. 2 mm. Ovary ovoid, glabrous. Style included, glabrous.
Known only from the type specimen.
* Sichuan (Chengkou Xian).