Is this wild buckwheat or a relative of it, grown in dry, sandy soil?
no, not a buckwheat or its relative – this is a type of gentian called Sabatia quadrangula, found mostly in the sandhills and piedmont. There are a few similar species of Sabatia, most of them are pink instead of white. Actually, a nice find!
Dr. Steven Hill, Botanist, SCNPS