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Pollen grains of 20 species belonging to 7 genera of Polygonaceae represented in the Flora were studied usingLight and Scanning Electron Microscope. Pollen characters, including those of size, shape, exine sculpture andstructure of the aperture allowed the recognition of five pollen types: Atraphaxixs, Calligonum-Oxygonum,Persicaria, Polygonum and Rumex-Emex types. A key for the seperation of the different types is provided andthe pollen morphology in relation to taxonomy of the investigated taxa is briefly discussed.

Pollen Atlas of the Flora of Egypt. 2. Species of Polygonaceae*