The genus Phoenix is characterized by dioecious wind-pollinated woody trees. The date palm (Phoenix dactylifera L.) is one of the world’s oldest cultivated fruit trees. The date palm inflorescence consists of a compound spadix enclosed by a spathe. Flowers are produced on strands. At anthesis, the spathe splits and the strands loosen and spread to expose the flowers. Cultivated date palms are artificially pollinated. Mature male inflorescences are cut off before the spathe splits, and the strands are placed in female flower clusters to ensure pollination. In earlier studies of pollen structure and stainability (1,2), abnormally large pollen grains were noted occasionally. This study dealt with pollen size distribution in 10 male palms used to pollinate female trees in commercial groves in the Al-Hassa region of Saudi Arabia.