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Keywords: demilitarized zone endemic plants naturalized plants rare plants a b s t r a c tThe flora of Jeokgeunsan Mountain forest genetic resources protection zone was identified and the major flora distribution examined. From May 2011 to September 2012, the flora was made up of taxonomic groups including 84 families, 283 genera, 432 species, four subspecies, 59 varieties, and six forma. Eleven families and 16 taxonomic groups were endemic plants to Korea, and 13 taxonomic groups were rare flora of Korea designated by the National Forest Service. Eight families and 24 taxonomic groups for naturalized plants were confirmed and the naturalization rate was 4.8%. Out of 501 taxonomic groups, 404 were resource plants of which 208 (41.5%) were edible plants, 152 (30.3%) were medicinal plants, 199 (39.7%) were herbaceous plants, and 55 (11.0%) were ornamental plants.