Abstract
The present work re-evaluates the Mandevilla subsessilis complex (Apocynaceae: Apocynoideae). Based on morphological analysis, including UPGMA, we recognize two separate species, respectively distributed primarily west and east of the Isthmus of Tehuantepec: M. platydactyla (with M. mollis as a synonym) and M. subsessilis. Mandevilla platydactyla is found from the Sierras de Chiapas to Nicaragua, whereas M. subsessilis is endemic to Mexico, particularly the Sierra Madre del Sur.