Monstera alcirana, endemic to Panamá, is described and illustrated using a color plate based on photographs of the vegetative and reproductive structures of living material. This species is the fourth of the very small species of Monstera in Central America. It is morphologically similar to M. obliqua, M. minima and M. gambensis but differs by has short internodes, thickly coriaceous blade and peduncle longer than the length of the leaf.