This is the Butterfly Pea (Clitoria mariana), which displays lavender-pink, pea-like flowers. It may be one of the most interesting and beautiful ivy blooms I have ever seen in the wild in Arkansas. It is a dense, evergreen, perennial twining vine in the pea family that is native to the southeastern United States. It's mainly a ground ivy, not climbing and I have often found it mixed with poison ivy, which is likely why I have just now discovered it - not one to hike in/around poison ivy. It is capable of fixing nitrogen in the soil.
I'll post a color photo soon. I wanted to show how stunning it is in black-and-white form first.
Forest floor near Conway, Arkansas.
Photo # DSCF1041-91c2bws2a.
(c) Kelly Shipp