Distimake macrocalyx (Ruiz & Pav.) A.R. Simes & StaplesMerremia macrocalyx (Ruiz & Pav.) O'DonellCONVOLVULACEAELocal: Parque Olhos Dgua, Braslia, Brasil.Ref.: a) Medeiros, J.D. Guia de campo: vegetao do Cerrado 500 espcies. MMA, 2011; b) Lorenzi, H. Plantas Daninhas do Brasil. 4 edio. Plantarum, 2008; c) Simes, A.R. & Staples, G. Dissolution of Convolvulaceae tribe Merremieae and a new classification of the constituent genera. Botanical Journal of the Linnean Society, 2017, 183, 561586.