Pollen flora of Pakistan-LXV. Berberidaceae

Pollen morphology of 12 species representing 2 genera of the family berberidaceae from pakistan has been examined by light and scanning electron microscope. pollen grains usually radially symmetrical,isopolar or apolar,spheroidal or sub-prolate.spiroaperturate rarely colpate (3-more),sexine thicker than nexine. tectal surface mostly foveolate-fossulate or sub-psilate,often rugulate - reticulate. on the basis of apertutal types and exine ornamentation four distinct pollen types are recognized,viz.,berberis calliobotrys-type,berberis jaeschkeana-type,berberis kunawurensis-type and epimedium elatum-type.