ABSTRACT
This work presents the Cactaceae checklist with geographical distribution and conservation status for the Rio de Janeiro State. The collections of the main herbaria in the State and the related bibliography were used as source of data. The results indicate the occurrence of 45 species distribute din 13 genera. Ten species are listed under threat categories and seven are State endemics. Despite the elevated urbanization pressure Rio de Janeiro was found as the most diverse municipality with 30 species. The genus Rhipsalis is notable in this checklist presenting 23 species.
Key-words:
Atlantic forest; checklist; conservation; Rio de Janeiro