Magnolia obovata Thunb.

Pictures 1, 3 & 4 in Japan, Honshu, Mt. Rokko, May 2008
Picture 2 in Japan, Honshu, road to Nikko, June 2010
Pictures 5 & 6 in Japan, Honshu, Kyoto, May 2008 (cultivated)
Pictures 7 & 8 in Japan, Honshu, Aizu, June 2010