1. Department of Biology, Graduate School of Science Kobe University Kobe Hyogo 657‐8501 Japan
2. Institute for Advanced Research Kobe University 1‐1 Rokkodai, Nada‐ku Kobe Hyogo 657‐8501 Japan
3. Field Science Center, Graduate School of Agricultural Science Tohoku University 232‐3 Yomogida, Naruko‐onsen Osaki Miyagi 989‐6711 Japan
4. Botanical Gardens Osaka Metropolitan University 2000 Kisaichi Katano City Osaka 576‐0004 Japan
5. Tama Forest Science Garden, Forestry and Forest Products Research Institute 1833‐81 Todori‐machi Hachioji Tokyo 193‐0843 Japan
6. 184 Kozu Island Village Tokyo 100‐0601 Japan
7. Narahashi 1‐363 Higashiyamato‐shi Tokyo 207‐0031 Japan
8. Museum of Natural and Environmental History Shizuoka, 5762 Oya, Suruga Shizuoka Shizuoka 422‐8017 Japan