Abstract
A new species of Calceolariasect.Cheiloncos endemic to central Chile is described. A comparison with the morphologically similar species Calceolariaasperula and Calceolariapetioalaris is made, and a key as well as detailed images to differentiate them is provided. The species is only known from the Natural Sanctuary Cerro El Roble, which is part of the coastal mountain range of central Chile and can be considered as Critically Endangered (CR) under the IUCN categories and criteria.