Maianthemum dilatatum (Wood) A. Nels. & Macbr.

Pictures 2 to 5 in Japan, Honshu, Mt.Rokko, May 2008
Picture 6 in Japan, Honshu, Gomi Pond, June 2010
Pictures 7, 8 & 9 in Japan, Honshu, Mt. Higashitate, June 2010

Description in Bot. Gaz. 61: 30, 189 (1916)