Abstract
Angiosperms being the most dominant plant community in the terrestrial landscape, naturally invite a look in to their evolution. Angiosperms originated during the Middle Triassic in fern and gymnosperm dominated ecosystems, diversified and completely covered the terrestrial landscape by the Late Cretaceous. In this paper, consistent fossil angiosperm pollen grain evidences from across the globe are being assessed to unravel the evolutionary history of angiosperms. The bulk of fossil evidences suggest Early Cretaceous origin of angiosperms while some of the fossil evidences do point to the presence of angiosperms in the Triassic. Diversification of angiosperms in the low latitudinal regions during mid Cretaceous period provides evidence that the warm and humid climate during Cretaceous must have played an important role in the proliferation and diversification of tropical angiosperms. Biogeography of most of the tropical angiosperm families can be linked with the continental plate tectonic history. This review is an attempt to bring together the palynological evidences that place angiosperm evolution in perspective.
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