Abstract: Eleven flavonoids were isolated from the 60% aq.acetone extract of the air-dried twigs of Myricaria germanica (Tamaricaceae),a famous Tibetian medicine.Their structures were elucidated by spectroscopic analysis and identified as 3,5,4'-trihydroxy-7,3'-dimethoxyflavone (1),3,5,4'-trihydroxy-7-methoxyflavone (2),rhamnetin (3),3,5,7-trihydroxy-4'-methoxyflavone (4),tamarixetin (5),kaempferol (6),quercetin-3-O-β-D-glucoside (7),kaempferol-3-O-β-D-glucuronic acid (8),quercetin-3-O-β-D-glucuronicacid (9),quercetrin (10),and afzelin (11),respectively.All compounds were obtained from M.germanica for the first time,and compounds 4,5,7—11 were obtained from the genus Myricaria for the first time.

Key words: Myricaria, Myricaria germanica, chemical constituents, flavone