Description from Flora of China
Clerodendrum divaricatum Siebold & Zuccarini (1846), not Jack (1820).
Herbs, perennial, ca. 80 cm tall. Branches 4-angled, subglabrous to pubescent. Petiole 0.5-2 cm; leaf blade ovate-oblong to ovate, 12-14 X 1.2-5 cm, membranous, sparsely pubescent, base cuneate to subrounded, margin coarsely serrate, apex acuminate to caudate, veins 3-5 pairs. Inflorescences axillary, cymes, dichotomous, sparsely pubescent; peduncle 2-3(-11) cm; bracts linear to lanceolate. Calyx cup-shaped, broader than long, 2-4 mm, inside pubescent; teeth 5, triangular, 0.6-1 mm. Corolla pinkish to purple to pinkish, 1-2 cm, outside pubescent, villous in throat, tube 0.8-1.6 cm, lobes entire, lower lobe broadly obovate. Stamens and style exserted. Ovary pubescent, ± glandular, apex rudimentarily 4-lobed. Fruiting calyx twice as long as flowering calyx, broader than long. Nutlets pale brown ovoid, shorter than calyx tube, reticulate, glabrescent. Fl. and fr. Jul-Sep.
Mixed forests on mountain slopes and along roadsides; 700-2900 m. Gansu, Henan, Hubei, Jiangxi, Shaanxi, Shanxi, Sichuan [Japan, Korea].