Hello everybody! First time posting on this site. I live in South Florida and I got this weed in several places of my lawn and its spreading fast. I haven't figured out what type of weed this is,my lawn is ST Augustine grass and I use Scott's Turf Builder Bonus S to control weeds but so far I have no luck killing this stubborn weed. Also search on the internet but couldn't identify it. Does anybody had encounter same weed before? Thanks in advance.