Painted Trillium, a native species, has been added to the USWildflowers database (07/01/2015.)  Scientific name is Trillium undulatum. Photo below was taken in the Great Smoky Mountains National Park along a quiet walk near Newfound Gap on May 05, 2015. Go to the Painted Trillium detail page for more photos and information.

Painted Trillium – Trillium undulatum