Eastern Sweetshrub or Sweet Betsy [Calycanthus floridus] found on the Big Glassy Mountain trail at Carl Sandburg Home on Memorial Day, 27 May 2013. It’s a member of the Strawberry-shrub (Calycanthaceae) family. Wild Flowers of North Carolina [1st Ed.], page 72, says “the flowers are an inch or more broad and have a spicy fragrance; the seeds are poisonous.”
USDA Plants Listing: https://plants.usda.gov/home/plantProfile?symbol=CAFL22