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Two unrecorded naturalized species, Lolium rigidum Gaudin (Poaceae) and Oenothera rosea L'Her. ex Aiton (Onagraceae) were newly reported in Korea. L. rigidum , ‘Daeng-Dol-Bo-Ri’, was found at roadside of Yesong beach, Yesong-ri, Bogil-myeon, and roadside of Myeongsasimni beach , Sin-ri, Sinji-myeon, in Wando-gun, Jeollanam-do. It was distinguished from L. mutiflorum Lam by spikelet 10-20 ㎜ long, florets 2-10(-13), and obtuse lemma, awn absent or up to 3-8(-10) ㎜. O. rosea , ‘Ae-Ki-Bun-Hong-Nat-Dal-Mat-I-Kkot’, was found in side of Wondong wetland, Yongdang-ri, Wondong-myeon, Yangsan-si, Gyeongsangnam-do. This taxon was distinguishable from other Oenothera in Korea by following combination of characters, stem erect to ascending, petal 5-12 ㎜ long, pink to bright purple. Descriptions and illustrations of the two taxa and their photographs in the habitat are provided along with a key to the species of Lolium and Oenothera from Korea. Key words - Lolium rigidum , Oenothera rosea

This study was carried out to investigate the flora of Baengnyeongdo (Isl.). The vascular plants which were collected in 5 times (from Aug. 2011 and Nov. 2012) were identified as 732 taxa in total, including 124 families, 411 genera, 647 species, 8 subspecies, 68 varieties, 7 forms and 2 hybrids. 193 of these taxa were first records for the region. In the flora of this area, the endangered plants designated and protected by the wildlife protection law, the Ministry of Environment, Korea were counted to two taxa. Korean endemics plants numbered 8 taxa, and 78 taxa of specially designated floristic regional indicator plants by the Ministry of Environment. And rare plants were identified as 20 taxa. Based on the list of southern and northern limit of distribution plants, 30 taxa and 43 taxa of halophytes were recorded in the investigated area. The naturalized plants were identified as 92 taxa, and their naturalization ratio were found to be 12.5%, respectively.