Wood Sorrel (Oxalis) Edible parts: It's a thirst quencher and is refreshing to eat. The leaves, flowers and immature green seed pods are all edible having a mild sour flavour that resembles lemons. It can be made into tea, added to salads, used in soups/sauces and used as a seasoning.
The garden you never knew you had! [Permaculture gardeners welcome useful wild plants growing alongside cultivated ones!] This is a link to a page that talks about nine (so far) very common "weeds" that are also very edible and good for you! [