Spurred Butterfly pea Centrosema virginianum, part of the bean (legume) family. We can find this sprawling vine from about April to September. It is vining, with no tendrils. The flower is a great nectar source and the plant is larval food plant for Long-tailed Skipper Butterfly, Urbanus proteus. It’s great for the organic butterfly garden. Thankfully, it tolerates dry conditions well. Thank you, Grady, for another great picture.