Today’s plant phylogeny more and more deals with ranks from the genus down, so changes in current taxonomy and nomenclature are frequently requested. For this reason, referring to the Euro+Med flora, we take here into account 20 taxa and recover the following forgotten nomenclatural combinations: Bidens atrosanguinea (Hook.) Regel, B. formosa (Bonato) Sch.Bip., B. sulphurea (Cav.) Sch.Bip., and B. tinctoria (Nutt.) Baill. ex Daydon. Moreover we propose the new names Agrostis linkii Banfi, Galasso and Bartolucci, Bidens selenactis Banfi, Galasso and Bartolucci, Bidens sweetiana Banfi, Galasso and Bartolucci, and the new combinations Achnatherum paradoxum (L.) Banfi, Galasso and Bartolucci, A. virescens (Trin.) Banfi, Galasso and Bartolucci, Agrostis linkii Banfi, Galasso and Bartolucci subsp. prostrata (Hack. and Lange) Banfi, Galasso and Bartolucci, Bidens atkinsoniana (Douglas ex Lindl.) Banfi, Galasso and Bartolucci, B. basalis (A.Dietr.) Banfi, Galasso and Bartolucci, B. gladiata (Walter) Banfi, Galasso and Bartolucci, B. lanceolata (L.) Banfi, Galasso and Bartolucci, Calamagrostis arenaria (L.) Roth subsp. arundinacea (Husn.) Banfi, Galasso and Bartolucci, Prunus ×hybrida (Schmidt) Galasso, Banfi and Bartolucci, Solanum aethiopicum L. subsp. anguivi (Lam.) Banfi, Galasso and Bartolucci, S. macrocarpon L. subsp. dasyphyllum (Schumach. and Thonn.) Banfi, Galasso and Bartolucci, S. melongena L. subsp. insanum (L.) Banfi, Galasso and Bartolucci, and Trisetaria argentea (Willd.) Banfi, Galasso and Soldano.