Common Evening-Primrose [Oenothera biennis] found at Fletcher Park on 30 September 2012 and 28 August 2013. Wildflowers of the Carolinas, pages 411-412, states it’s a member of the Evening-Primrose (Onagraceae) family.
USDA Plants Listing: Oenothera biennis
Common Evening-Primrose – 30 September 2012
Common Evening-Primrose – 28 August 2013
