Passiflora mexicana Juss. is a wild relative of cultivated passionfruit and ornamental passion flowers. It is widespread in Mexico and just extends into southeast Arizona, where it is rare.

With over 100 species of passion flowers in Mexico alone and over 600 globally, Passiflora is a highly diverse genus. This herbaceous climber uses tendrils to ascend other vegetation in riverine woodlands, thickets, and semi-arid shrublands, including parts of the Sonoran and Chihuahuan deserts.

Like other passion flowers, it has complex flowers with a frill of tentacle-like projections called a corona, which in P. mexicana can be orange, red or pink. These delicate, unusually coloured flowers make it of horticultural interest to passion flower enthusiasts.

The leaves are sometimes harvested from the wild in parts of Mexico to make a local tea, though there are no reports that the fruits are eaten.