The species of Loranthaceae and Viscaceae which occur at "Restinga de Maricá", RJ were studied. These taxa are threatened by extinction, due to diverse interferences that are changing the floristic and vegetacional composition of the area. There are two genera with four species for Loranthaceae and one genera with five species for Viscaceae. Three new occurrences for the location are mentioned and field observations are given.
Loranthaceae; Viscaceae; "restinga de Maricá"; taxonomy