Following our previous studies in PROTEACEAE, in this part of our Catalogue we have examined pollen grains of LORANTHACEAE and OLACACEAE of the subtropical ombrophilous forest of South of Brazil. No clear similarities have been observed in the pollen morphology between the three families. The evolution of pollen morphology in these families follow the development to parasitic forms. This can be observed through definite and constant pollen morphology of various genera of LORANTHACEAE and grains with poor defined apertures and simple exine structures in OLACACEAE. In relation to LORANTHACEAE, it is possible to differentiate the genera by their pollen morphology and, sometimes, groups of species, based on details of the exine structures (as in Struthanthus). Both species of OLACACEAE studied, belonging to different genera, present different pollen morphology.