Variation in the pollen morphology of four fuel wood yielding tree species has been recorded under light and scanning electron microscope. Pollen are present in polyad condition in case of Acacia auriculiformis A.Cunn. and Acacia nilotica Willd., where as pollen are tricolporate in case other two fuel wood yielding tree species like Bauhinia variegata Linn. and Butea monosperma (Lam.) Taub. Exine thickness was effectively greater in slow growing species than in fast growing species but length and width of colpi was distinctively higher in all fast growing species. Though all the investigated taxa belonging to the family Fabaceae, a difference between the fast and slow growing species on the basis of pollen morphological characters has been received.