Distribution: Russian Far East (Amur, Khabarovsk, Primorye); China (Anhui, Beijing, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hongkong, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Macao, Ningxia, Shaanxi, Shandong, Shanghai, Shanxi, Sichuan, Tianjin, Yunnan, Zhejiang); Tibet; North Korea; South Korea; Japan (Hokkaido, Honshu, Shikoku, Kyushu); Taiwan; South China Sea Isl.
31 RFE 36 CHI TIB 38 JAP KOR NKO TAI 42 SCS
Synonyms: hidden
= Centrantheropsis rigida Bonati; Bull. Soc. Bot. Genève, Sér. 2, 5: 314 (1913 publ. 1914)
= Gerardia japonica Thunb.; Fl. Jap. [Thunberg] 251 (1784) et Syst. Veg., ed. 14: 553 (1784)
= Phtheirospermum chinense Bunge; Index Sem. (St. Petersburg [Petropolitanus]) 1: 35 (1835) ex Fisch. & C. A. Mey., Linnaea 10: Litt.-Ber. 99 (1836)
= Phtheirospermum esquirolii Bonati; Monde Pl. 9: 14 (1907)
= Phtheirospermum japonicum f. albiflorum (Honda) H.Hara; Enum. Spermatophytarum Japon. 1: 270 (1948)
= Phtheirospermum japonicum (Thunb.) Makino; Bot. Mag. (Tokyo) 13: (111) (1899), isonym