Description from Flora of China
Rehmannia rupestris Hemsley in F. B. Forbes & Hemsley, J. Linn. Soc., Bot. 26: 195. 1890.
Herbs, 25-50 cm tall; stems, pedicels, petioles, and calyces white woolly. Stems simple or branched at base, woody. Basal leaves petiole 3-6 cm; leaf blade ovate-oblong to narrowly elliptic, 7-13 cm, thick, subleathery, white lanose-villous or subglabrous, base subrounded to broadly cuneate, margin coarsely serrate or lobed and toothed. Pedicel 0.6-2 cm. Bracteoles ca. 5 mm, inserted at middle of pedicels. Calyx 1-1.5 cm; lobules 3-6 mm. Corolla purple-red; tube narrowly tubular, straight or slightly curved; lower lip lobes oblong-ovate, ca. 6 X 5 mm; upper lip lobes broadly ovate, ca. 5 X 6 mm. Filaments glabrous. Ovary ovoid, ca. 5 mm. Style slightly longer than stamens, apex 2-lobed; stigma lobes subglobose. Seeds minute, oblong. Fl. Jul-Sep.
* Cliff faces; 200-1200 m. Hubei.