Squirrel Corn, a native species, has been added to the USWildflowers database (04/26/2016.) Scientific name is Dicentra canadensis.  Photo below was taken along the Great Smoky Mountains National Park Cove Hardwood Nature Trail, Sevier County, TN on April 21, 2016. Go to the Squirrel Corn detail page for more information.

Squirrel Corn – Dicentra canadensis