Peltanthera has been described by Bentham in 1876. He based it on a single species, P. floribunda. In 1938 Standley and Steyermark described Valerioa in the Solanaceae, but they were in doubt about its most natural position. Several years later, in 1951, Cuatrecasas discovered, that Valerioa costaricensis, the only species of the genus, belonged to Peltanthera and therefore he combined it with the latter genus. The present author holds the opinion, that both species cannot be distinguished, as is demonstrated below. The name Peltanthera is a nomen conservandum (Intern. Code of Bot. Nom. 328. 1966).