A taxonomic treatment of Cactaceae species from Paranapiacaba Biological Reserve and surroundings is presented. An identification key and descriptions of 14 species, with notes regarding their ecology and conservation are included. The species identified were: Hatiora salicornioides (Haw.) Britton & Rose, Lepismium houlletianum (Lem.) Barthlott., Rhipsalis baccifera subsp. shaferi (Britton & Rose) Barthlott & N.P. Taylor, R. burchelli Britton & Rose, R. campos-portoana Loefgr., R. elliptica G. Lindb. ex K. Schum., R. floccosa Salm-Dyck ex Pfeiff., R. juengeri Barthlott & Taylor, R. neves-armondii K. Schum., R. olivifera N.P. Taylor & Zappi, R. paradoxa (Salm-Dyck ex Pfeiff.) Salm-Dyck, R. pulchra Loefgr., R. puniceodiscus G. Lindb. and R. teres (Vell.) Steud.
Atlantic Forest; conservation; ecology; taxonomy