the unidentified plant I mentioned appears to be a common blue violet. My yard is left au naturale (no herbicides) so a lot of wild plants grow there. The blue violets (and others) grow and do what they do.
You are very lucky, wild violets are considered a "super food" as they are LOADED with both vitamin and minerals (normally you get just vitamins or just minerals).
In many cases a lot of the effectiviness of herbs comes from their help treating malnutrition.
-Blast