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About 500, see text The passion flowers or passion vines (Passiflora) are a genus of about 500 species of flowering plants, the namesakes of the family Passifloraceae. They are mostly vines, with some being shrubs, and a few species being herbaceous. For information about the fruit of the passiflora plant, see passionfruit. The monotypic genus Hollrungia seems to be inseparable from Passiflora, but further study is needed. The family Passifloraceae is found worldwide, except in Europe and 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, as well as China and Southern Asia (17 species), New Guinea, Australia (four, possibly more species) and New Zealand (a single endemic species). But new species continue to be described for example, P. pardifolia and P. xishuangbannaensis are only known to science since 2006 and 2005, respectively.
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