Passionfruit – Passiflora incarnata
The picture above is the fruit of Tennessee’s State Wildflower – Passionflower, Passiflora incarnata. I can report reliably that it is edible, similar to the species which is frequently cultivated in tropical regions – Passiflora edulis, although P. incarnata fruit is typically smaller than that of P. edulis. Passiflora incarnata is a plant native to the United States, while Passiflora edulis has been introduced to the United States and is found in the wild in Georgia and Florida.