Well, the photo is so small and we can't see the leaves.
Must be a pansy, not a violet, but...not sure !:-/ Don't you have any web site talking about wild plants in your big corner of the world ?

All the best :-)
Thierry.

hi moko...

i agree with thierry your viola seems to be in the 'pansy' part of the family. i would suggest your very sweet viola might be viola rafinesquii. i have never seen this before except in baird's book of wild violets of north america.

it's just a guess, ok!?

rob...

I tend to agree - go search for pictures of Viola rafinesquii or Viola bicolor (the current/correct name) in google, see if they agree your plant.

Here is a link that might be useful: