Two New Species of Pilea Lindl. (Urticaceae) from Southern Brazil

While studying Urticaceae from the southern region of Brazil, we found two new species, Pilea tenebrosa and Pilea acanthoides, which were collected in the states of Santa Catarina and Parana, respectively. These species are here described, illustrated, and compared to morphologically similar species. An identification key to the species of Pilea in southern Brazil also is provided.