This study focuses on the Haloragaceae found in the state of Rio de Janeiro. It is based on a morphological analysis of herbaria collections, as well as on a review of the relevant literature and on collections in the field. A total of two genera and two species were recorded for the state: Laurembergia tetrandra e Myriophyllum aquaticum. An identification key, descriptions, illustrations, habitat data, phenology, and species distribution are also provided.
Haloragaceae; floristic inventories; Rio de Janeiro; taxonomy