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Several species-rich groups of non-native taxa occur in Florida and can be difficult to identify. This synopsis provides identification keys and brief discussions of the naturalized species of six genera in Florida: Agave, Cinnamomum, Corymbia, Eucalyptus, Pandanus, and Sansevieria. Of the genera treated here, only one taxon is presumed to be a pre-Columbian native, Agave decipiens, and all others are considered exotic. Agave neglecta is treated as a synonym of A. weberi. Cinnamomum burmannii, Pandanus odorifer, and Sansevieria trifasciata are here reported for the first time in the flora of Florida. Lectotypes are designated for A. decipiens and A. sisalana var. armata. Many of the genera possess a convoluted taxonomy and are in need of a modern taxonomic revision. Thus, for the most part, heterotypic synonyms are not listed except for two synonyms discussed in Agave. All cited specimens examined are from Florida. All photos are by the author unless indicated otherwise.

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