Looks like saint john's wort, botanical name hypericum.Not for sure which species,there are several, but my guess would be hypericum prolificum linnaeus.

Barry, I just checked out the rest of your pics and all I can say is WOW...what a beautiful place you have!! Where in South Georgia do you live? How do your Mules hold up during the winter? Thanks

Can't remember if I responded to you privately or not, raymikematt. I live in Brunswick, and the mules hold up great. Never phased at all. I grow several queens, majesty palms, chamaedoreas, dypsis, and many, many others (about 200 total), but I wrap many of them as the temperature dips to certain temps (i.e., some have to be wrapped at 30*, some at 28*, some at 26*, etc.). I started out collecting palms, then tropicals, but now my interest has turned mostly toward succulents. I bought every one I could get my hands on this past year. I'm anxious now to see how they winter.

There are so many yellow wildflowers & photo IDs are tough. The flowers sure look like hypericum, but the leaves don't quite, and it seems more upright than the StJ'sW that I know, though as JerrieDee says there are many kinds.

Stylosanthes biflora, Euphorbia esula, Monarda punctata might be contenders too. Or some kind of Sundrops?