Notes on the Pollen Morphology and Phylogeny Restionales and Poales

Acetolysed pollen of the Restionaceae Centrolepidaceae and allied families were studied by light microscopy, scanning electron microscopy and transmission electron microscopy, with special reference to the structure of the aperture and interapertural walls. It has been found that the Poales and Restionales share several features of exine stratification and aperture structure. These pollen characters were not found in the Centrolepidaceae, Hanguanaceae and Hydatellaceae. It was further found that both the Restionaceae and the Poaceae possess unique pollen wall characters, on the basis of which a phylogenetic hypothesis is presented.