The passion fruit is a climbing vine. More precisely, it is a very vigorous and fast growing climbing vine.
Passion fruit vines have large, three lobed leaves, little tendrils that wrap themselves around whatever they can get hold of, and the most gorgeous flowers of all fruits.
The fruit is either yellow or purple (depending on the variety, see below), round, and about five to eight cm across. It has a smooth, thick, pithy rind, filled with sweet, aromatic pulp, juice and seeds.
Passion fruit vines climb up any support, readily and rapidly, and they climb as high as they can
There are two main passion fruit varieties.
Passiflora edulis is the purple passionfruit, passiflora edulis f. flavicarpa is the golden passion fruit, also called tropical passion fruit.
The purple passion fruit is a native of Brazil. Nobody knows where the tropical passion fruit originated. The tropical passion fruit is slightly bigger, and slightly more acidic. Purple passion fruit is sweeter.
Commercial growers in cooler climates often use hybrid varieties of the purple and golden passion fruit. That way they get a plant that tolerates cooler weather.
The variety Panama confuses people, because it can be purple. However, Panama is a true tropical passion fruit of the type flavicarpa (which is usually golden). It is also called purple flavicarpa or Panama Red. Even though it seems to be a mix, it is not a hybrid.