Passionflower or Maypop   Passiflora incarnata   A drought-tolerant vine that prefers dry soil and sun, although it will grow in partial shade.
The vines climb by tendrils. They can be used to cover a fence or trellis, grown in a container, or used as groundcover.

Passionflower vines are considered invasive weeds by some. They do produce suckers, but they are intolerant of regular mowing. If there are Zebra Longwings, Gulf Fritillaries, or Julias in the area, the vines' vigorous growth is appreciated - the caterpillars can chow down and the vines will still have leaves.
 
Plants of the passionflower family, Passifloraceae, provide striking flowers, edible fruit, and host butterflies.