Some native passionvines:
Passiflora tenuiloba Slender-Lobe Passionflower - green flowers
Passiflora lutea Yellow Passionflower - pale yellow-green flower
Passiflora affinis - similar to P. lutea
Passiflora incarnata (?) Passionflower - I don't know its common name
lavender flowers

No doubt that there are others as well. I know that P. tenuloba & P.
lutea grow here in Austin. They are very small in comparision to the
large more tropical varieties.

-Nancy