A palynological study of some cultivated trees from Karachi

The pollen morphology of 25 species belonging to 23 genera distributed in 13 families have been examined by light microscopy and scanning electron microscope. Generally pollen grains occur singly and rarely in polyads. Pollen grains generally 3-colporate in families viz., Bignoniaceae, Myrtaceae, Mimosaceae, Anacardiaceae, Apocynaceae, Caesalpiniaceae