St. John’s wort (Hypericum calycinum)
Native to woodlands in the Southeast, this hypericum makes a good groundcover and erosion control plant, growing up to 18” and filling in gradually by stolons underground. Evergreen here, although some winter damage may need to be pruned out. Has yellow summer flowers in Tennessee and Alabama—we don’t see many here. Let us know if yours blooms, we’ll come take some cuttings!