Pollen fertility status of 30 species including mangroves, mangrove associates as well as other coastal species from Maharashtra and Goa States of India is studied by using Alexanders Differential staining technique. Three different groups of plants are considered on the basis of the population size viz. large sized, medium sized and small sized populations including narrowly distributed species. The results obtained show there is slight decrease in the pollen fertility from large sized populations to small sized populations. Overall, pollen fertility of the studied species ranges from 53 to 98%.