Abstract: Tamarix L. is a genus with the distribution pattern of Old World Temperate. The distribution patterns of 3 recognized sections covering 68 species in Tamanx are analyzed, and the result showet that the three centers of frequency distribution possessed with diffesent quantities of species: the W. Asia sub-region of Irano-Turanian Region (30spp. /3sects., including 13 endemic species), the C. Asia subre-gion of Irano-Turanian Region (20spp. /2sects., including 6 endemic species), the Meditenanea Region (12spp. /3sects., including 6 endemic species). In the light of the fact that most taxa including the primitive and advanced ones, and the most taxa including the primitive and advanced ones in Tamarix oc-cur in the W. Asia.

Key words: Tamarix L.