Abelia tetrasepala (Koidz.) Hara & Kurosawa

Pictures 1 & 2 in Japan, Shikoku, May 2008
Pictures 3 & 4 in Japan, Honshu, Yudanaka Shibu, June 2010
Pictures 5 & 6 in Japan, Yunoko Lake, June 2010

Description in J. Jap. Bot., xxx.296 (1955)