Is this a relative to the deerberry, grown in dry, sandy soil?
yes it is a relative – it is Vaccinium arboreum, the farkleberry also called sparkleberry. Not very good tasting, though, at least to me. Of course, the deerberry is inedible. It is a shrub with a very wide southeastern U.S. range.
Steve Hill, Ph.D. Botanist, SCNPS