This is one of the rare pleasures growing in the Mesic Forest section of 40 Acre Rock Heritage Preserve. Richard Porcher has a section devoted to this on Pages 427-428 of "A Guide to Wildflowers of South Carolina."
small, early spring ephemeral; growing in forest on steep slope of a ravine; uncommon
Small spring ephemeral; growing on slope of a ravine in a wooded area
First time I've seen this around the Beaver Pond. Usually see it below the rock.