Passionflower, a woody vine with showy flowers, cultivated for its edible fruit. There are 400 species, native to tropical America, Asia, and Australia. The plant was named by missionaries who saw in its flowers various symbols of the passion (suffering) of Christ.

Purple granadilla and giant granadilla are passionflowers native to southern Brazil. They are grown for their yellow or purple berries, which are used to make a beverage called passion juice or water lemon. Purple granadilla is grown commercially in Australia, New Zealand, Hawaii, and southern California. Sweet calabash (also called sweetcup or conch apple), a passionflower native to the West Indies, has grape-flavored berries used to make a beverage. Maypop, or wild passionflower, is found in the southeastern United States and from Missouri southwest to Texas. It has white or pale lavender flowers with a purplish-pink corona (crown-like center). It bears yellow, many-seeded berries.

Purple granadilla is Passiflora edulis flavicarpa; giant granadilla, P. quadrangularis; sweet calabash, P. maliformis; maypop, P. incarnata. Passionflowers make up the family Passifloraceae.