Therefore, we hypothesized that: (1) the physiological features of P. morifolia, P. suberosa litoralis, and P. palmeri var. sublanceolata, three wild species of Passiflora with ornamental potential, are sensitive to changes in light environment; and (2) the structural changes in leaves are related to photosynthetic adaptations to different levels of PPFD. This study aimed to evaluate the effects of four levels of irradiance on gas exchange, fluorescence emission, chlorophyll concentration, and morpho-anatomical features in plant leaves of P. morifolia, P. suberosa litoralis and P. palmeri var. sublanceolata to select sun- and shade species for landscaping projects, and provide support for introducing the cultivation of Passiflora in the tropical ornamental plants market in Brazil.