About Geranium thunbergii Siebold & Zucc. ex Lindl. & Paxton
Geranium thunbergii Siebold & Zucc. ex Lindl. & Paxton, commonly called Thunberg's geranium, Japanese geranium, or Japanese cranesbill, is a species of cranesbill. In Japan, it is counted among the most popular folk medicines, and is also recognized as an official antidiarrheic drug. This species is known as ゲンノショウコ in Japanese. The ellagitannin geraniin can be found in Geranium thunbergii.