Abstract
New records of Poaceae in Brazil and Bolivia are documented from expeditions, collections and review of herbarium specimens. Eleven new records are confirmed and comments, IUCN Threatened Species Categories and illustrations for these taxa are provided. Mesosetum comatum and M. filifolium are new records for Brazil, and M. ansatum is a new record for Bolivia. Paspalum burchellii, P. lepton, P. oteroi and P. trinitense are new records for Bolivia.