Abstract:The adaptive faculty and tolerance for the ecological factors of 131 species (subspecies or varieties) of Rhododendron which were gathered from different places,belong to 7 subgenera,35 sections (or subsections) respectively and were Exsitu conserved in China Rhododendron Garden,Dujiangyan,Sichuan was investigated by means of semiquantitative method.The result revealed that very adaptive ones accounted for 25%,adaptive ones accounted for 52%,less adaptive ones accounted for 15%,inadaptive ones accounted for 8% of the total.Most species which are inclusive of Subgen.Hymenanthes,SubgenRhododendron or those introduced from Evergreen Broadleaved Forest,Evergreen and Deciduous Broadleaved Mixed Forest,Needleleaved and Broadleaved Mixed Forest,and Cold Temperate Conifer Forest,are found very adaptive or adaptive to the habitat of the Garden.Where as,those rhododendrons introduced from Alpine Shrub,Alpine Meadow and PinusQuercus Mixed Forest on comparatively lower elevation are found less adaptive or inadaptive to the habitat of the Garden.From the evidence mentioned above,we can reasonably inferred that the location of China Rhododendron Garden we chose had basically satisfied the need for Exsitu conservation of rhododendrons.