Which viola is this?

[Lori S.]

Thanks, everyone, for all the information.  I intended to check on the stem/leaf arrangement (as per Lis' and Hoy's advice) but unfortunately, it will have to wait for spring now, as the plant was pretty much stomped into oblivion by the efforts to cut down and eventually remove some old roses in that area.  I have the sense that it is likely V. odorata, though, as Lis suggested, from the general look of it (both stems and leaf shape) and will try to confirm it in spring.

[Hoy]

If it is Viola odorata certainly you will know for sure in spring when it blooms Here V. odorata is the very first violet to flower and no other has a scent like it! Later most of the flowers are cleistogamous.