A woody vine capable of growing to 15-20 m high where supporting trees are available. The leaves are alternate, palmately five-lobed (sometimes three or seven lobes).
The white and purple-blue flowers which appear in summer may be as large as 4 in (10.2 cm) across. The fruit is an oval orange-yellow berry.
Numerous crosses have been made between P. caerulea and Passiflora racemosa, Passiflora alata, and Passiflora Amethyst.