Abstract: A large number of plants have been brought to the areas of Western Ghats of Maharashtra mostly by foreigners right from the days of Greeks (327 BC) to modern times. Many such introductions got acclimatized/established in the original flora of the area and now constitute important elements of the present day flora. It is difficult to identify such naturalized species from the original flora on account of their wide distribution and occurrence in the wild. This category of plants needs critical taxonomic investigations. This paper accounts for 35 such established exotic trees having common occurrence and wide distribution and remarks on their established and spread have been presented.