Photographed this in Corkscrew Swamp Sanctuary during a very dry season. Am unable to find out what it is. Seem to be a vine and possibly have a small yellow flower.
This is another picture of the same vine, with this one showing some sort of a seed pod. Sorry I was unable to post this picture with the previous one.
Melothria pendula, I believe -- or some other closely-related cucurbit. Highly variable leaf shape, it looks like.