This is Passiflora macrophylla, also known as the Tree Passion Flower, Baum-Passiflora, and Passionsblume. This is one of the few passion fruit that grow as a tree. This one has leaves that get up to 3 feet long and 1 foot wide. These gorgeous flowers grow from the trunk of the tree which grows very few branches. 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