Cnidoscolus quercifolius (syn. C. phyllacanthus; common names in Portuguese: favela, faveleira, faveleiro, and mandioca-brava) is a species of flowering plant. It is endemic to Brazil. Its distributional range includes Bahia, Pernambuco, and Piauí. Its common name is the source of the term "favela" for a type of low-income informal settlement in Brazil.

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