The pollen grains of guava and its relatives are triangular, oval and round in shape with size varying from 15.6 u to 25.2 μ and 14.7 to 21.1 in acetocarmine media for Safeda and Seedless respectively. The minimum and maximum size of pollen grains were 12.6 to 16.8 in Psidium polycarpum and 16.8 μ 48.3 in P.molle. The - maximum percentage of fertility was recorded in P.polycarpum (98.85%) and the miminum in P.cattleianum (18.64%) respectively. The pollen grains of all the species could be stored well up to 210 days in shallow pan (refrigerator) at 15 2°C for prolonging the storage life of the pollen in Psidium species. The pollen has lost its viability with- in 30 days at room temperature.
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