I've always liked these little plants. Big ones, with purple flowers are growing by the front door; tiny ones with yellow flowers all over the garden. They pop up in early spring around St. Patrick's Day - like little shamrocks.
Now I know you can eat them! They are also called Wood Sorrel and taste very lemony - like the French Sorrel growing in the garden. Funny how often I have thrown the pesky things in the compost (their little roots are hard to get at sometimes) while praising and watering the domesticated sorrel. No more. They are delicious and beautiful - and plentiful in early spring. And they help make a very pretty salad.