Green flowers just have never been my 'cup of tea', but as you say, it does look interesting. I fight the invasive wild violets every year in my yard too. Maybe you could try some in an area kinda separated from everything else in case they do get a little too enthusiastic about multiplying. That way it would be easier to get rid of them without disturbing other plants.
By the way, I appreciate you, ESH, and some of the others who post on here frequently. I've learned a lot from you guys!
Vicki

I have no experience (or familiarity) with this one, Rb. It certainly is a modest looking plant. I googled around but didn't see any comments about it being aggressive/weedy. However, that may just be due to the fact that people don't invite into their garden.

I do love the Bird's Foot Violet - such pretty foliage and such a bold flower. I have had some trouble keeping it around, despite it's love of plain of clay soil.

Here is a link that might be useful: Bird's Foot violet gallery page