Aesculus turbinata Bl.

Pictures 1 & 2 in Japan, Honshu, Kyoto, May 2008 (cultivated)
Pictures 3, 4, 5 & 6 in Japan, Honshu, Yudanaka Shibu Area, June 2010
Pictures 7 & 8 in Japan, Honshu, Mt. Higashitate, June 2010

Description in Rumphia iii. 195