Three Wild Violets

"Three wild violets" sounds like a good title for romantic fiction, but in reality it's the three Violas I have growing in my yard. The one above is the common violet, which many people will recognize in their lawns.

This is downy yellow violet.

And I suspect this is dog violet. I like this online source about Minnesota wild flowers:  https://www.minnesotawildflowers.info/ 

P. S. This is a busy time of year for gardeners (and mothers of students!). I'll still post, but less frequently until the end of June.