Abstract
In this study, the anatomical and palynological features of 5 taxa belonging to the genusBallota of Lamiaceae from Egypt were examined and evaluated by light and scanning electron microscopy (SEM) in order to determine the taxonomic value of the observed peculiarities. Features related to pollen grains (pollen shape and tectum sculpture type) and anatomical characters (shape in outline, dermal, ground and vascular system) were found to be important in separating the examined taxa. Three keys are provided according to stem anatomy, petiole anatomy and pollen grains characters. The light and SEM images of investigated taxa are presented for comparison. Overall, the anatomical and palynological characters are very useful in the separation of Ballota species. Key words: Comparative, anatomy, palynology, Ballota, Lamiaceae, Egypt.
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