Pauca-Tanco, G. A., Balvin , M., Hoxey , P., Quipuscoa , V., & Quispe-Turpo, J. del P. (2021). Geographic distribution and conservation status of Eulychnia ritteri Cullmann (Cactaceae), an endemic cactus from southern Peru. Revista Peruana De Biología, 28(4), e19290 . https://doi.org/10.15381/rpb.v28i4.19290