Pollen morphology of some Poa taxa in Turkey

12 taxa of the genus Poa which distributed in Turkey were examined palynologically with light microscope and scanning electron microscope. In addition to this thesis, the pollen morphology of the genus Poa has been revealed. Clustering analysis was performed with the data matrix based on palynological features to determine whether these data were systematically important or whether there was a grouping in the sections. Pollen surfaces are categorized with image processing programs to distinguish of pollen exine surface ornamentation. In this thesis, pollen types of 12 taxa genus Poa were determined as Monoporate. The pollen shape of P. trivialis was Subprolate while the pollen shape of other taxa was determined as Prolate-Spheroidal. The thickness of the exine was determined between 1,43-2,01 µm. The porus shape was observed as Prolate-Spheroidal in 12 Poa taxa. The poruses have operculum and the annulus diameter is between 4,10-5,23 µm. As a result, we were found that the types of ornamentation were a distinctive character among the studied taxa. But exine ornamentation types can not be used in sectional distinction as a result of UPGMA dendrogram.