A new record of <i>Rhododendron keiskei</i> Miq. var. <i>hypoglaucum</i> Suto & Suzuki (Ericaceae) in Korea

Abstract

ABSTRACT: Rhododendron keiskei Miq. var. hypoglaucum Suto & Suzuki (Ericaceae) was found in Yeosu-si,Jeollanam-do, Korea. This species is distinguished from related taxa in Korea by lepidote hairs entire, flower-bud terminal, inflorescences umbel-like racemes, corolla lepidot outside, white tinged with yellow. This taxonwas named ‘Seom-Jin-Dal-Lae’ in Korean based on its habitat. We provide its description, illustrations, pho-tographs and a key of related taxa in Korea. Keywords: Rhododendron keiskei var hypoglaucum, Ericaceae, new record, Korea 적요: 진달래과의Rhododendron keiskei Miq. var. hypoglaucum Suto & Suzuki가 전라남도 여수시섬지역에서 발견되었다. 이 종은 전체적으로 인편상 털이 분포하며, 꽃의 동아는 정단부에 1개가 달리고, 화서는 산형총상화서를 가지며, 화관은 노란색을 띠는 백색에 외부에는 인편상 털이 있는 특징을 가지고 있어 한국에 분포하는 근연 분류군들과 구분된다. 국명은 생육지를 고려하여 ‘섬진달래’로 신칭하였고, 이에 대한 기재, 도해, 사진 및 검색표를 제시하였다. 주요어: 섬진달래 , 진달래과, 미기록한국Rhododendron Linnaeus (Ericaceae Juss.) includes about1,000 taxa and is widely distributed in Asia, Europe, NorthAmerica (Fang et al., 2005). Since the gnus was establishedby Linnaeus, its infrageneric relationships have been wellstudied by many taxonomists. Sleumer (1949) divided thegenus into 8 subgenera and Cullen (1980) and Chamberlain(1982) divided it into 5 subgenera. Resently Fang et al.(2005)and Yamazaki (1996) divided it into 9 subgnera.Twenty three taxa of Rhododendron are distributed in thewild in korea(Korea National Arboretum et al. 2014). Duringan expedition to the south island in korea, We found anunrecorded species of Rhododendron. This species ischaracterized by evergreen and entire leaves with lepidote hairs,flower-bud terminal and single, flower white tinged withyellow. After studying the unidentified specimen and literature,we concluded it represents Rhododendron keiskei Miq. var.hypoglaucum Suto & Suzuki within section Rhododendron ofsubgenus Rhododendron (Yamazaki, 1996). So far it has beena endemic plant of Japan. In this study, Rhododendron keiskeiMiq. var. hypoglaucum Suto & Suzuki is reported as a newlyfounded taxon in Korea. In addition, we provide its description,illustrations, photographs and a key of related taxa.