In this study, 25 plots(400m²) were set up to understand the flora and vegetati on structure of Mt. Youggye Section. Two groups of Quercus acutissima-Quercus mongolica group, Quercus mongolica-Carpinus laxiflora group community were classified by cluster analysis. In the correlation between species, it showed a strong positive correlation such as between Styrax japonicus and Corylus heterophylla, Meliosma myriantha; Pinus rigida and Styrax japonicus; Prunus sargentii and Corylus heterophylla, Styrax japonicus; Quercus acutissima and Symplocos chinensis; Pinus densiflora and Lindera erythrocarpa; Lindera obtusiloba and Sapium japonicum; Rhododendron mucronulatum and Stewartia pseudocamellia, Quercus mongolica, Sapium japonicum; Pinus koraiensis and Ligustrum obtusifolium; Quercus serrata and Corylus heterophylla, Meliosma myriantha, Styrax japonicus, Prunus sargentii; Styrax obassia and Symplocos chinensis; Rhododendron schlippenbachii and Quercus mongolica, Fraxinus sieboldiana. The Species diversity(H') of investigated groups were ranged from 0.4961 to 0.9321.
The flora in Mt. Yonggye was classified to as; 537 taxa; 108 families, 322 genus, 477 species, 3 subspecies, 47 varieties and 10 forma.
Korea endemic plants were appeared Scutellaria insignis, Philadelphus schrenkii, Coreanomecon hylomeconoides etc. 10 taxa. The special floristic plants were appeared Sedum takesimense, Peucedanum japonicum, Cynodon dactylon etc. 47 taxa. The special floristic plants were appeared Corylopsis gotoana var. coreana, Monotropa uniflora, Veratrum versicolor etc. 26 taxa. The naturalized plants were appeared Ambrosia artemisiifolia, Bidens pilosa, Bidens frondosa etc. 31 taxa, The rate of naturalization was 5.8%. Rare plant species designated by Korea Forest Service were appeared Corylopsis gotoana var. coreana, Crypsinus hastatus, Monotropa uniflora, Monotropa uniflora etc. 12 taxa.