"Tanna-waremokou" (Sanguisorba sp.) belongs to Rosaceae (the Rose family). It is a perennial herb that is said that it is native to Jeju Island in the southern part of the Korean Peninsula, but it is not clear. It is also known as "Hime-waremokou" in Japan, it is cultivated for ornamental purposes. The height will be 15 to 30 cm. The leaves are impari-pinnate compound. From July to August, the elliptic inflorescences are borne at the terminal branches, and the flowers bloom from top down of clusters. The Japanese name "Tanna" (Tamna) is a kingdom that existed on Jeju Island from ancient times to the Middle Ages.