Passionfruit is a climbing vine. More precisely, it is a very vigorous and fast growing climbing vine.
Passionfruit 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 in my garden.

Passiflora edulis is the purple passionfruit, passiflora edulis f. flavicarpa is the golden passionfruit, also called tropical passionfruit.
The purple passionfruit is a native of Brazil. Nobody knows where the tropical passionfruit originated. The tropical passionfruit is slightly bigger, and slightly more acidic. Purple passionfruit is sweeter.
Commercial growers in cooler climates often use hybrid varieties of the purple and golden passionfruit. That way they get a plant that tolerates cooler weather. (The hybrids have all kinds of fancy names, SuperSweet, Lacey, Purple Gold etc.)
The variety Panama confuses people, because it can be purple. However, Panama is a true tropical passionfruit 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!