Abstract
This study focuses on the Hydroleaceae species from the state of Rio de Janeiro. It is based on morphological analysis of herbaria specimens, as well as on a review of the relevant literature and field collections. One genus and two species were recorded: Hydrolea elatior and H. spinosa. Identification key, descriptions, illustrations, habitat data, phenology, and species distribution are also provided.
Key words:
floristic; Hydrolea; aquatic plant; taxonomy
