<i>Phyllanthus timboënsis</i>(Phyllanthaceae), a new species from Santa Catarina, southern Brazil

This work describes Phyllanthus timboënsis, a narrowly endemic new species from Santa Catarina state, southern Brazil. We provide a detailed morphological description, a distribution map and photographs of the new species, and assess its conservation status. Furthermore, we provide an identification key to species of Phyllanthus that occur in the states of Rio Grande do Sul and Santa Catarina, southern Brazil.