Arctous ruber (Rehder & Wilson) Nakai, which produces small and appetizing fruits, is designated as a rare and endangered species of wild flora. It is a leaf-dropping shrub that grows in the alpine plain, and its only known habitat within South Korea is Seorak-san (Mountain). In North Korea, it can be found on Baekdusan Mountain, the Gaema Plateau, etc. There are three species of genus Arctous found around the world and one of them is indigenous to Korea. Their stems creep into the underground, with 2~3 light-yellow-colored flowers blossoming between May and July. From August to September, the shrub bears a round, red-colored fruit that tastes sweet and sour.