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Spiranthes longilabris Lindl.
Orchidaceae (Orchid Family) USDA Symbol: SPLO2 USDA Native Status: Native to U.S. http://plants.usda.gov/java/profile?symb...... http://www.wildflower.org/gallery/result......
Forest
A tincture of the root is used as a homeopathic remedy. It is used in the treatment of skin affections, ,pain in the kidneys and eye complaints.
My apologies but this surely isn't an orchid and looks to be in the Polygonaceae and chances are good it is as I have suggested above give where you saw it and plants around it in the photo.