One of the least thirsty of flowers and great in rarely watered baskets or pots. I've got some I like too.
Here is the flower of that passion vine, membranacea. Passion vine enthusiast go nuts for it online because many grow theirs in greenhouses but this one doesn't want extra heat and gets huge. I used to cut it back to the fence it grew beside every other year and take a full truck load to the dump.
An old video which shows just how heavily it would flower. It liked having some foliage in the sun but most flowers in the shade below.