The vascular plants of Mt. Gulbong, Munkyeong were summarized as 302 taxa including 82 families, 214 genera, 259 species, 3 subspecies, 35 varieties and 5 forms. Furthermore, Therophytes (Th) were 71 taxa (23.5%), Hemicryptophytes (H) were 63 taxa (20.9%), Geophytes (G) were 44 taxa (14.6%) showed high proportional ratio in life form. The rare plants were 4 taxa including Aristolochia contorta (LC), Penthorum chinense (LC), Rhododendron micranthum (VU) and Utricularia vulgaris var. japonica (VU). The endemic plants were 3 taxa including Populus tomentiglandulosa, Salix koriyanagi and Paulownia coreana. The specific plants were 15 taxa including Pinus koraiensis, Celtis aurantiaca, Angelica gigas, Lonicera praeflorens, Monochoria korsakowii and so forth. The naturalized plants were 18 taxa including Fallopia dumetorum, Tagetes minuta and so forth. The invasive alien plants were 2 taxa including Sicyos angulatus and Aster pilosus. Naturalization index (NI) was 5.9% of all 305 taxa of vascular plants and urbanization index (UI) was 5.6% of all 321 taxa of naturalized plants.