Libertina effusa (Lib.) Höhn., the type species of Libertina Höhn., and L. stipata (Lib.) Höhn, are redescribed from the syntype collections of Ascochyta effusa Lib. and A. stipata Lib. and shown to be conspecific. The similarity with some Phomopsis species that produce B-spores is emphasized and P. effusa (Lib.) comb.nov. is proposed.