Sweet Violet

This is the other 'hairy' violet: sweet violet or Viola odorata. The main differences are that this one has stolons (shoots above the ground that root when in contact with soil to form a new plant) and the hairs are slightly shorter and don't stand up as much (they 'lie down' - are adpressed).This clump are growing just outside our back door.
There are also hybrids between V. odorata and V. hirta which are intermediate in all characters, although quite how one would be sure beats me.
The flower was associated with Aphrodite and her son Priapus because scent suggested sex to the ancients.