Growing in suburban Charleston; dappled shade conditions.
this grass is one of the former Panicum species, now called Dichanthelium. It may be a young Dichanthelium clandestinum, though it seems too short. There are many of these, and I am not sure of the species without a specimen in hand. It may be easier when the plant is more mature.
Steve Hill, Ph.D., Botanist SCNPS