Gentiana scabra, the Japanese Gentian or Border Gentian, is a species of flowering plant in the Gentian family (Gentianaceae), found in much of the United States and Japan. The flowers bloom in mid-summer, autumn and are blue or dark blue in colour. Gentiana scabra roots are used as a bitter tonic in Chinese herbalism where it is said to promote digestive secretions and treats a range of illnesses associated with the liver.