You both are welcome! Thanks for the confirmed ID Sandra!
Bobby, regrettably I don’t have any data to give a ‘yes’ or ‘no’ to your ‘ Metro Atlanta & W Georgia’ question. You might be find the information helpful on the discovery in LA for this (new?) exotic species from the included link below. There is Plants of the World online’s distribution map for largeleaf marsh pennywort includes North Carolina & South Carolina also. Thanks to Sandra’s post & photos, we now know that this species is present in Roswell, GA.
Laura

https://www.jstor.org/stable/41972400

Thanks Laura! Sstuder’s third picture was a new wrinkle for me in regards to the pennyworts.
I am very familiar with the lawn marsh pennyworts. It seems that the large leaf marsh pennywort prefers more southern climates. Is it rather uncommon for Metro Atlanta & W Georgia?
Walter sure needs to give you a raise!

Thanks Laura735! I think you nailed it! I appreciate your help 🙂
Sandra

More images of largeleaf marshpennywort from Alabama Herbarium Consotium. Scroll & click the camera tabs.

http://www.floraofalabama.org/Plant.aspx?id=5458

Maybe one the species in the pennyworth (Hydrocotyle)? Possible the largeleaf marshpennywort (H. bowlesioides)? c Copy & paste the included link below to view images of the species. Click on mages to enlarge. Best wishes!

https://www.inaturalist.org/taxa/163872-Hydrocotyle-bowlesioides/browse_photos

If I could leave another pic youd see its densely covering the ground. With lots of tiny seed balls or flower heads.

I see why youd suggest, but no. Each stem grows from a runner. It doesnt branch off. Also the Bristly Mallow leaves are more serrated.

Compare to bristly mallow.

Bristly Mallow