Abstract
A new species, Myrcia proencana is described from eastern Bolivia. It is known from the Serranía de Huanchaca in the Noel Kempff Mercado National Park. M. proencana is compared with M. torta which is the species most similar. Also, we determined that Psidium hians should be considered as an accepted name, and P. nutans should be included in its synonymy. Additionally, Eugenia paranahybensis, E. pitanga, E. suberosa, Psidium misionum and P. myrsinites are reported as new records for the Bolivian flora.