Viola hastata
From the site Viola in the West Virginia Mts.
"Viola hastata is a fascinating plant. Even if it never flowered it would be well worth growing for its silvery marbled foliage. The specific epithet hastata , refers to the almost arrow shape of the leaves. The variation among populations is astounding. I have spent much time in the woods leap frogging around on the ground looking at leaves as different as snowflakes. Viola hastata has yellow flowers. Viola canadensis is the tallest of our native Viola species. As with the aforementioned species, this Viola can be found in moist rich woods throughout the state. Attaining a height of 12"-16", this specie has large white flowers with a spur petal yellow at the base and striped with fine, dark lines. The three lower petals are purple veined. "