Green Violet, a native species, has been added to the USWildflowers database (05/10/2013.) Scientific name is Hybanthus concolor. Photo below was taken at The Pocket at Pigeon Mountain, Walker County, GA on May 7, 2013. Go to the Green Violet detail page for more photos and information.
What a neat wildflower, I had never heard of it!
I hadn’t heard of it either until a few years ago I passed someone on a trail who asked if I had seen the green violets back the trail a bit. Not knowing what to look for, and since they don’t really stand out, I walked by the indicated area without seeing them. I went home and looked them up, and since then have stumbled upon them in several places.