Asarum sieboldii Miq.

in Japan, Honshu, Nagano, June 2010 (pictures 1 & 2)
in Japan, Honshu, road between Takayama and Matsumoto, June 2010 (pictures 3 & 4)
in Japan, Honshu, Nagano, June 2010 (pictures 5, 6 & 7)
in Japan, Honshu, Nikko, June 2010 (pictures 8, 9 & 10)
in Japan, Honshu, Gomi Pond, June 2010 (pictures 11, 12 & 13)
Distribution : Japan (Honshu, Kyushu), Korea (Soul mountains), Manchuria, China (Anhui, Henan, Hubei, Jiangxi, Shaanxi, Shandong, Sichuan, Zhejiang)
Pictures 14 & 15 : white form

Description in Ann. Mus. Bot. Lugd.-Bat., 2:134 (1865)