Asian Journal of Research in Botany

Pollen morphology is used for comparative importance in taxonomy and evolution at all taxa levels. The pollen features are constant for each genus while the exine sculpturing pattern is highly recognizable for various genera. In this study we have narrated how pollen exine thickness acts as an adaptive feature of hydrophytes. There is a clear increase in exine thickness with respect to the ecological classes of hydrophytes which can be treated as evolutionary schemes of the plant kingdom. An attempt is also made to find if there is any relation to pollen morphology and exine pattern. The value of such studies could be augmented appreciably where it is possible to supplement the other data with pollen records for the more distant past and experimental treatment of postulated vegetational process of hydrophytes.