1. Department of Botany, National Museum of Nature and Science, 4-1-1 Amakubo, Tsukuba, Ibaraki 305-0005, Japan
2. Laboratory of Pharmacognosy, Showa Pharmacetical University, Higashi-tamagawagakuen 3, Machida, Tokyo 194-8543, Japan
3. Proffesor Emeritus, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
4. Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Locked Bag 2073, 88999 Kota Kinabalu, Sabah, Malaysia