Passiflora incarnata

The straight species, and hardiest of passion flowers.  It has small to medium light purple blooms which are produced in abundance all summer.  It dies back to the ground and reappears in May resulting in its common name ‘maypop’.  It will sucker from the roots and spread and also produces abundant, but small edible fruits with viable seed if pollinated.

Hardy to zone 7, maybe colder with protection