And it sure is trying, too! I'm pretty sure it originates in my neighbor's yard and if it wasn't so shady and dry it would be everywhere in that area. There are a couple of lovely red flowers 'way up in the top of the oak tree right now.
Luckily I have a garden helper who comes once a week, and chases it back to where it came from on a regular basis. Amidst Virginia creeper, pigeon pea, balsam pear, air potato and the wild grape vines, there's lots to keep us busy around here!
Thunbergia has a great color.
This one Passiflora quadrangularis, limped along for 2 years giving me one flower per year, but this year it has shown it's true nature and is now climbing up into the bamboo stand.