Dr. Takuji Hoshino (Hoshino Lab., Okayama University of Science)
Dr. Hiroshi Ikeda (Botany, Univerisity Museum, the University of Tokyo/ TI Herbarium)
Dr. Yu Ito (Setsunan University)
Dr. Akira Yamawo (Hirosaki University)
Dr. Kohtaroh Shutoh (Hokkaido University)
Dr. Takashi Shiga (Niigata University)
