Mountain Wood Sorrel – Native Plant of the Day 05/31/2016
Photo from 06/18/2005. Location: Great Smoky Mountains National Park, TN. More photos / info at the Oxalis montana detail page.
Mountain Wood Sorrel, Northern Wood Sorrel – Oxalis montana
Also NPOD 05/15/2011, 05/15/2012, 05/15/2013, 05/16/2014, 05/16/2015