I asked about this plant with curling, ribbon-like leaves last May, but it was too immature for an ID. You did think it might be an Aster, and it is.
The flowers appeared in late October/ early November. Maybe the photos of the flowers can help ID the kind of Aster it is?
Growing in suburban Charleston, dappled shade.
your plant best matches Symphyotrichum racemosum, a newer name for Aster racemosus, the Small white aster. It is considered to be common and is native.
Dr. Steven Hill, Botanist, SCNPS