A new cliff dwelling species of Espostoa Br. & R.(Cactaceae) from northern Peru

Summary: Espostoa cremnophila is described as a new species of cactus from Peru. It grows exclusively on vertical cliff faces in a side valley of the Rio Maranon in the northern part of the Department of La Libertad, Peru. It is likely that the most closely related taxa are Espostoa calva F. Ritter and Espostoa utcubambensis G.J.Charles with which it is compared.