This site may be of some help. I've copied and pasted the tidbits that seem relevant to your search for an ID. The terminal tooth comparative length and the frequent natural hybridization are what caught my attention.
http://plantwatch.naturealbert...:
The leaves are divided into three strongly-toothed, egg-shaped leaflets (leaflets usually 2 to 7cm long). Fragaria viriginiana: The upper leaf surface is bluish-green, the terminal tooth of each leaflet is shorter than its adjoining teeth, and the leaf teeth are blunter.
Fragaria vesca: The leaves are yellow-green on the upper surface, and the terminal leaflet tooth of F. vesca is longer than its adjoining teeth.
The woodland strawberry (Fragaria vesca) frequently hybridizes with wild strawberry (F. virginiana), making some plants difficult to distinguish to species. The deeply pitted fruit in wild strawberry (F. virginiana) is one differentiating characteristic that appears to be consistent.
