Newly recorded species of Epipogium roseum (Orchidaceae) from Jejudo Island, Korea

The following unrecorded species was discovered: Epipogium roseum (D. Don) Lindl. (Orchidaceae). This species has been reported sporadically in Japan (southern Kanto, Kyushu, and the Ryukyu Islands), southern China, Taiwan, India, Malaysia, and Australia. However, it has recently been established that this plant also grows on Jejudo Island in Korea. In this study, we present a description and photographs highlighting differences between Korean E. aphyllum and related species, and provide a key to related taxa. This discovery extends the known distribution of the genus in Korea and contributes to the understanding of the diversity of holomycoheterotrophic orchids in East Asia.