Ten tetraoxygenatcd xanthones (l-hydroxy-3,7,8-trimethoxyxanthone I ; 1,7dihydroxy-3,8-dimethoxyxanthone 11; 1,7,8-trihydroxy-3-methoxyxanthone 111; 1,3,7,S-tetrahydroxyxanthone IV ; 3,7,8-trirnethoxyxanthone-l-O-primeveroside V; 7-hydroxy-3,s-dimethoxyxanthone -1-0primeveroside VI ; 1,8-dihydroxy-3-methoxyxanthone -7-0acetylrutinoside VII ; 7,S-dihydroxy-3-methoxyxanthone-l-O-primeveroside VIII ; 3,7,8-trihydroxyxanthone-l-0-primeveroside IX; 3,7,8-trihydroxyxanthone-l-O-glucoside X) have been isolated from leaves of Gentiana bavarica L. by means of column chromatography on polyamid. Among these xanthones, VI, VII, VIII and I X were not encountered before in nature.