1. Dept of Environmental Horticulture, Univ. of Seoul Seoul Republic of Korea
2. Shingu Botanic Garden Seongnam Republic of Korea
3. Dept of Horticulture Design, Shingu College Seongnam Republic of Korea
4. Baekdudaegan National Arboretum Bonghwa Republic of Korea
5. Natural Science Research Inst., Univ. of Seoul Seoul Republic of Korea