I have pulled more of this than I can even say. This little yellow flower is called Wood Sorrel. Some people use it in salads. As a kid, I use to eat the tiny green seed pods that look like miniature green bananas. They are in the family oxalis. That name might seem familiar to some, as that is the same name as the Shamrocks that people buy around St. Patrick's Day. The leaves of both plants are the same, 3 heart-shaped leaves connected. Although, Shamrocks have much bigger leaves.
There are a number of varieties of wood sorrel, with colors ranging from white, to yellow, to purple.
It is important to note that plants in the family oxalis contain high amounts of potassium oxalate and oxalis acid. If you have problems with kidney disease, rheumatoid arthritis, or gout, it should not be consumed.
Remember to 'like' and 'share' the love of nature!