본 연구는 경북 울진군 새덕산 산림유전자원보호림의 식물상을 조사하기 위하여 수행되었다. 2009년 4월부터 10월까지 3회에 걸쳐 조사된 관속식물은 74과 154속 200종 3아종 26변종 4품종 233분류군이다. 이중 한국특산식물은 가는장구채, 홀아비바람꽃, 매화말발도리 등 9분류군, 희귀식물은 백작약, 미치광이풀 2분류군이 확인되었다. 또한, 식물구계학적 특정식물종은 24과 28속 30종 30분류군이 확인되었다. 그 중 정밀 조사종은 IV등급 승마, 노랑제비꽃, 꼬리진달래 3분류군, III등급 물박달나무, 산팽나무, 돌단풍, 긴잎산조팝나무, 노랑갈퀴, 미치광이풀, 올괴불나무, 광릉용수염, 애기감둥사초 9분류군이 확인되었다. 조사지역에서 확인된 귀화식물은 족제비싸리, 개망초 2분류군으로 귀화율은 0.9%이다.This study was performed to investigate vascular plant of Mt. Sea-duk. The vascular plants were collected 3 times from April 2009 to October 2009 were listed 233 taxa: 74 families, 154 genera, 200 species, 3 subspecies, 26 varieties and 4 forms. The 9 taxa were recorded in the surveyed sites as the endemic plants; Silene seoulensis, Chloranthus japonicus, Deutzia uniflora and others. The 2 taxa were recorded in the surveyed sites as the rare plants; Scopolia japonica, Paeonia japonica. The specific plants which is categorized to Degree by the Ministry of Environment appeared as 30 taxa; Degree IV was 3 species ; Cimicifuga heracleifolia, Rhododendron micranthum, Viola orieMiniis and Degree III was 9 species; Betula davurica, Celtis aurantiaca, Mukdenia rossii etc. and Degree II was 9 species ; Weigela florida, Saussur damacrolepis, Melampyrum setaceum etc. and Degree I was 9 species; Hostdacapitdta, Polygondtum inflaauranImpatiens noli-tangere etc.. The exotic speices in surveyed area was 2 taxaes; Amorpha fruticosa, Erigeron annuus, and Percent of exotic plant species was 0.9%.