Two new species of Calanthe (Orchidaceae: Epidendroideae) from Korea

Two new species, Calanthe insularis S.H.Oh, H.J.Suh & C.-W.Park and Calanthe rubra S.H.Oh, H.J.Suh & C.-W.Park, are described, illustrated, and compared with closely related species. Calanthe insularis , distributed in the southwestern region of Korea and Tsushima Island in Japan, is morphologically similar to C . aristulifera and C . striata , but it is distinguished from the last two species in its creamy yellow and pale orange-yellow flowers, arcuate spur as long as the lip, pale orange-yellow pedicels, and green ovary with pale green ridges. Calanthe rubra , from Gageodo Island, Korea, is similar to C. striata and C . insularis , but differs from them in its much smaller flowers with purplish red sepals and petals and the white spur.