This is Passiflora maliformis, also known as Conch Apple, Sweet Calabash, and Sweet Cup. The fruit that grows on this plant has a hard shell and is edible. Passiflora maliformis likes to live in partial sun to light shade where it is very popular with the birds, bees, and butterflies. This is a host plant for the Zebra Long Wing, Zebra Heliconian, Julia Heliconian, Isabellas Heliconian, Banded Orange Heliconian, Mexican Fritillary, Scarce Bamboo Page, Erato Heliconian, Variegated Fritillary, and Gulf Fritillary butterflies. It is also a larval host plant for the Plebeian sphinx Moth. USDA Hardiness Zones 10 to 11