The vascular plants in Yeohangsan, Muhaksan and Palyongsan were listed 373 taxa; 87 families, 222 genera, 284 species, 3 subspecies, 71 varieties and 15 forms. The flora in the Yeohangsan were listed 267 taxa, Muhaksan were listed 199 taxa and Palyongsan were listed 163 taxa. Divided into 373 taxa; woody plants were 142 taxa (38.1%) and herbaceous plants were 231 taxa (61.9%). Based on the list of rare plants (IUCN) by the Korea Forest Service and Korea National Arboretum, 3 taxa (Wikstroemia ganpi, Tricyrtis macropoda, etc.). Based on the list of Korean endemic plants, 10 taxa (Philadelphus schrenkii var. schrenkii, Indigofera koreana, Lespedeza maritima, Stewartia pseudo-camellia, Weigela subsessilis, Hosta minor, etc.). Specific plants by floral region were total 34 taxa (9.1% of all 373 taxa of vascular plants); 2 taxa (Dumasia truncata, etc.) in class IV, 4 taxa (Rhus succedanea, Stewartia pseudo-camellia, Salvia japonica, etc.) in class III, 3 taxa (Viola orientalis, Cymopterus melanotilingia, Teucrium veronicoides) in class II, 25 taxa (Dryopteris erythrosora, Betula schmidtii, Quercus variabilis, Aphananthe aspera, Morus cathayana, Nanocnide japonica, Clematis patens, Rhynchosia acuminatifolia, Euonymus japonicus, Meliosma oldhamii, Cayratia japonica, Ardisia japonica, Ligustrum japonicum var. japonicum, Trigonotis icumae, Microstegium japonicum, Arisaema ringens, Polygonatum falcatum, etc.) in class I. Based on the list of naturalized plants, 20 taxa (Rumex crispus, Chenopodium album var. album, Amaranthus lividus, Phytolacca americana, Lepidium apetalum, Trifolium repens, Ailanthus altissima for. altissima, Oenothera biennis, Galinsoga ciliata, Bromus unioloides, etc.) and naturalization rate was 5.4% of all 373 taxa of vascular plants.