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The family Passifloraceae is found worldwide, except Antarctica. Passiflora is also absent from Africa, where many other members of the family Passifloraceae occur (e.g. the more plesiomorphic Adenia).
Nine species of Passiflora are native to the USA, found from Ohio to the north, west to California and south to the Florida Keys. Most other species are found in South America, China, and Southern Asia, New Guinea, four or more species in Australia and a single endemic species in New Zealand. New species continue to be identified: for example, P. pardifolia and P. xishuangbannaensis have only been known to the scientific community since 2006 and 2005, respectively.
Some species of Passiflora have been naturalised beyond their native ranges. For example, Blue Passion Flower (P. caerulea) now grows wild in Spain.[1] The purple passionfruit (P. edulis) and its yellow relative flavicarpa have been introduced in many tropical regions as commercial crops.