TWO NEW RECORDS OF THE GENERA NAJAS (NAJADACEAE) AND LEMNA (LEMNACEAE) FOR AQUATIC FLORA OF IRAN

For the preparation of aquatic Flora of Iran treatment, the families Najadaceae and Lemnaceae were studied. Among them, the specimens of Najas gracillima were collected from Khuzestan province wetland and the specimens of Lemna perpusilla  were collected from Fars province wetland for the first time for the aquatic flora of Iran. In this paper, the two species are reported from Iran. Key to the species of both genera is presented for the species occurring in Iran.