Passiflora incarnata, or Maypop as it is commonly known, is a deciduous species of Passionflower native to the southeastern U.S. (USDA Zones 6-9). They will flourish in full sun to light shade.
A tea made from the dried leaves is supposed to soothe nerves and cure insomnia.
Maypops spread by seed and root suckers, so once you have them established in your garden, you will always have a plentiful supply of butterflies and fruit!
Buy seed of this plant!