Passionflower (Passiflora spp.) vines feature exotic-looking ... Black-eyed Susan vines (Thunbergia alata) produce bright, black-eyed, yellow or orange flowers with a dark center.

Passiflora or passion flower is a genus of more than 550 species which are members of the Passifloraceae family. The genus, which contains vines, lianas, shrubs and trees, is predominantly distributed ...