In this paper we reassess 482 collections of the lichen genus Graphis from Everglades National Park using the recent world key of Lücking and co-workers as the principal reference. We report a total of 31 species present in the Park. Of these, three species, Graphis brittoniae, G. elevata and G. hinnulea, are described as new to science. In addition, the following eleven species are newly reported from North America: Graphis analoga Nyl., G. cincta (Pers.) Aptroot, G. chlorotica A. Massal., G. crebra Vain., G. dendrogramma Nyl., G. filiformis Adaw. & Makhija, G. furcata Fée, G. modesta Zahlbr., G. neoelongata Zenker, G. renschiana (Müll. Arg.) Stizenb. and G. supracola A. W. Archer. Each species is described and discussed based upon Park collections. Notes concerning some species previously known from North America are also included where new or interesting information can be added to the literature. Conversely, species well documented elsewhere where we have nothing to add are excluded from that section. Graphis chlorotica, also new to North America but collected from outside the Park, is treated here since the key would be incomplete with its omission. Photos of all 32 species are provided including the degree of excipular carbonization. A key is provided for all species of Graphis known to occur in Florida.