This is Passiflora coccinea, also known as Scarlet passion flower, and Red passion flower. Growing at lengths of 30 feet this vine likes to live in sun to partial shade. From the middle of Spring to the middle of Fall this vine blossoms red. 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.