Are passion flower and passion fruit the same vine, or two different plants? I think I remember that we had yellow fruit on the passionflower vine.
Passion flower and passion fruit can be the same thing. The vine primarily grown as an ornamental is also sometimes called passion vine, and it is in the same genus (Passiflora) as the vine cultivated for its fruit. The passion fruit most commonly eaten is Passiflora edulis, which doesn’t do well with our winters here in Western Washington, but Passiflora ‘Incense’ and Passiflora incarnata can survive our winters and produce edible fruit. Another passion flower species, Passiflora caerulea, is often grown here, but the Sunset Western Garden Book says its yellow-orange fruit “isn’t very tasty.”