Global Carex Group (http://systematics.mortonarb.org/cariceae/about)
Dr. Takuji Hoshino (Hoshino Lab., Okayama University of Science/ The Japanese Society of Cyperology)
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)