We are grateful to everyone that helped us on our trips to Huancavelica and Pasco. Roxana Rojas kindly prepared the distribution map presented in Figure 3. We also thank the editor and two reviewers that helped to improve an earlier version of the manuscript. Delsy Trujillo kindly provided us with pictures of material gathered at MOL. This article has the Open Access option thanks to the support of José ‘Joe’ Koechlin (Inkaterra Association). CM thanks Mario Blanco for his comments on the authority of M. fletcheriana. The study was funded by the Fondo Nacional de Desarrollo Científico (CONVENIO Nº 126-2020-FONDECYT), through a research grant to CM.