1. Department of Biosphere–Geosphere Science, Faculty of Biosphere–Geosphere Science, Okayama University of Science, Okayama, Japan
2. Tsukuba Botanical Garden, National Museum of Nature and Science, Tsukuba, Japan
3. School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
4. Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Kunming, PR China