This study was carried out to inventory the vascular plant flora in Deokjeokdo and its adjacent regions (Mungapdo, Soyado), Ongjin-gun, South Korea, from April to October 2014. Based on the voucher specimens, vascular plants in this area consisted of 108 families, 362 genera, 578 species, 5 subspecies, 66 varieties and 4 forms, totally 653 taxa. In the flora of this area, 5 taxa of Korean endemic plants were found distributed in the sites, including Hepatica insularis Nakai and Asarum glabrata (C.S.Yook & J.G.Kim) B.U.Oh. Korean rare and endangered plants found in this area were 1 taxa of Critical Endangered Species (CR) and 5 taxa of Vulnerable Species (VU). The floristic regional indicator plants found in this area were 67 taxa comprising 3 taxa of grade V, 2 taxa of grade IV, 12 taxa of grade III, 3 taxa of grade II and 47 taxa of grade I. Naturalized plants consisted of 67 taxa, such as Chenopodium album L. and Erigeron annuus (L.) Pers. were recognized widely distributed in the area.

• 김현준(국립수목원 산림생물조사과) | Hyun-Jun Kim (Division of Forest Biodiversity and Herbarium, Korea National Arboretum of the Korea Forest Service)
• 지성진(국립수목원 산림생물조사과) | Seong-Jin Ji (Division of Forest Biodiversity and Herbarium, Korea National Arboretum of the Korea Forest Service)
• 정수영(국립수목원 산림생물조사과) | Su-Young Jung (Division of Forest Biodiversity and Herbarium, Korea National Arboretum of the Korea Forest Service)
• 박수현(국립수목원 산림생물조사과) | Su Hyun Park (Division of Forest Biodiversity and Herbarium, Korea National Arboretum of the Korea Forest Service)
• 이슬기(국립수목원 산림생물조사과) | Sle-Gee Lee (Division of Forest Biodiversity and Herbarium, Korea National Arboretum of the Korea Forest Service)
• 이찬우(국립수목원 산림생물조사과) | Chan-Woo Lee (Division of Forest Biodiversity and Herbarium, Korea National Arboretum of the Korea Forest Service)
• 장계선(국립수목원 산림생물조사과) | Kae Sun Chang (Division of Forest Biodiversity and Herbarium, Korea National Arboretum of the Korea Forest Service) Corresponding author