Pollen flora of Pakistan -LXVIII. Dipsacaceae

Pollen morphology of three genera representing 6 species of the family dipsacaceae from pakistan has been examined by light and scanning electron microscope. pollen grains usually radially symmetrical,isopolar,mostly prolate-spheroidal rarely spheroidal,porate or tricolpate,sexine thicker or thinner than nexine. tectal surface mostly spinulose rarely scabrate. on the basis of apertural types 3 distinct pollen types are recognized,viz.,dipsacus inermis-type,pterocephalus gedrosiacus-type and scabiosa candollei-type.