This is Passiflora bryonioides, also known as cupped passion flower. The fragrant flowers attracts birds, bees, and butterflies. Growing over 40 feet tall, this plant likes to live in full sun. From the middle of Spring to the middle of Fall this plant has purple and white blossoms. 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 9 to 11.