These plants are P. Edulis 'Frederick' Plant, Purple Passon Fruit Plant.

They produce the large edible passion fruit that are purple, best to let it fall to the ground rather than pick it.

This vine will do extremely well in California and Florida, and will produce fruit in colder states as well as it can be grown in a pot and brought in for the winter.
It can also be ground grown but mulched in the winter.

The fruit is a very delicious and considered one of the best tasting of the Passion Fruits.