New and interesting milkweeds (Apocynaceae, Asclepiadoideae)

Three Mesoamerican species of Marsdenia and four of Matelea are described a s new and illustrated. New combinations are provided for a South American B lepharodon, a Mesoamerican Cynanchum, seven Mexican species of Dictyanthus, a species of Gonolobus from Mesoamerica and Ecuador, and one Mesoamerican and two Ecuadorian species of Jobinia. One species of Marsdenia and one of Metastelma, both from Mexico, are lectotypified, and the new name Marsdenia pulpusiana W. D. Stevens is provided for Ecliptostelma molle Brandegee. Th e typification of Mabelea ampiyacuensis Morillo is clarified, and the synon ymy of Metaplexis rostellata Turczaninow is corrected.