Photographs of flowers for the other members of Rhododendron tschonoskii alliance. A Rhododendron tschonoskii, Mt. Bandai, Fukushima Prefecture, Japan B Rhododendron tsusiophyllum, Mt. Kobushigatake, Yamanashi Prefecture, Japan C Rhododendron trinerve, Mt. Sanpouiwa, Ishikawa Prefecture, Japan D Rhododendron tetramerum, Mt. Yatsugatake, Nagano Prefecture, Japan. Photographs A–C by Yoichi Watanabe D courtesy of Osamu Takahashi.