southern dawnflower, Stylisma humistrata

It was a very pretty sight, with bindweed twining and blooming among the lantana. But wait a sec, those stems are too thick, and it doesn't look quite like that nasty invasive bindweed. It turns out we're looking at a native morning-glory relative. And since it's just a relative, we call these dawnflowers. They're mostly white, but at least one other species is pink. Southern dawnflower twines over other plants and stuff in AL, AR, FL, GA, LA, MS NC SC TN, TX, and VA. Polk Co FL, 10/21/15. Bindweed family, Convolvulaceae.