Plants 15-30 cm tall, glabrous. Stems 6-7 cm, 4-5 mm in diam., usually branched from base. Leaves at stem base, ovate-lanceolate or lanceolate, 6-8 X 3-4 mm. Flowers solitary, terminal. Pedicel purple-red, erect, 15-20(-25) cm, striate. Calyx spathelike, 4.5-5 cm, apex obtuse-rounded. Corolla red-purple, sometimes red-purple on upper part and white on lower part, nearly bilabiate, 5.5-6 cm, apex 5-lobed; lobes subrounded or nearly flabellate, ca. 8 mm X 1-1.2 cm, margin dentate. Filaments 1.3-1.5 cm. Ovary 1-locular; parietal placentas 4. Style glabrous, 2-2.5 cm; stigma 8-9 mm in diam. Capsule conical, 2-2.5 X ca. 1.5 cm. Seeds numerous, discoid, ca. 0.04 mm in diam.; testa reticulate. Fl. Apr-Jun, fr. Jun-Sep.

Roadsides; 800-900 m. Anhui, Fujian, Jiangxi, Zhejiang [Japan].