Viola stoneana House. Section: Nosphinium. Subsection: Borealiamericanae. Phen: Apr-Jul. Hab: Moist loam of rich mesic forest slopes and bases of slopes. Dist: Local along and near the "fall line" between the upper Atlantic Coastal Plain and the lower Piedmont, se. NY to c. VA; disjunct in ec. NC.
Origin/Endemic status: Endemic
Taxonomy Comments: Although most taxonomists have followed Russell (1965) in treating Viola stoneana House as a hybrid, studies have shown it to be distinct, fully fertile, and inhabiting a quite different rich mesic forest habitat with a regionally endemic distribution; it is treated separately here.
Synonymy: = F, G; < Viola palmata L. var. palmata – FNA6, K3, K4, RAB; < Viola subsinuata Greene – Pa