These examples of Golden Alexanders or Golden Zizia [Zizia aurea] were found on the Blue Ridge Parkway Shut-In Trail on 25 May and on 26 May 2013 at The Botanical Gardens at Asheville. It’s a member of the Carrot (Apiaceae) family and listed on pages 226-227 of Newcomb’s Wildflower Guide.
USDA Plants Listing: https://plants.usda.gov/home/plantProfile?symbol=ZIAU