Shrubby St. Johnswort [Hypericum prolificum] found near the Blue Ridge Parkway in South Asheville, just off the Mountains-to-Sea Trail, on 27 July 2013. Newcomb’s Wildflower Guide, pages 294-295 states that it blooms in summer and can be found in pastures and on rocky slopes and it also lists it under its older synonym Hypericum spathulatum.
USDA Plants Listing: Hypericum prolificum