Abstract
During the course of floristic studies on Urticaceae in Distrito Federal, Brazil, we encountered a species of Pilea that was not described until now. Pilea brasiliensis is here described and illustrated, its affinities are discussed and its position in Weddell & Killip’s subdivisions of the genus is indicated. A Conservation Assessment determines P. brasiliensis to be Critically Endagered (CE) with the possibility that it may be Extinct in the Wild (EW).