As below Campis sucker. Here is a link that might be useful:

It's a Question Mark. The name refers to a small gold mark on the underside that is in the shape of a question mark.

I would like to ID the MATCHWEED into oblivion. I too live in Florida and hate this noxious weed. It can take over your yard and grows under and over any existing grasses like Bahia or St. Augustine. Cute huh? It is so cute, I may just try to kill it! This post was edited by homegrown55 on Thu, Nov 27, 14 at 17:50

I had one of these in my yard just yesterday......the 3 things that helped me i.d. it were the crest, the yellow belly, and the rufous tail.