Wood sorrel (oxalis) can be found all throughout woodland areas. Here is what it should look like:
This plant is filled with oxalates and vitamin C. Oxalates is a salt compound that makes things taste sour, rhubarb is another great example of a plant filled with oxalates. Typically the greens are what is eaten. Some native Americans chewed on wood sorrel to alleviate thirst or to cure mouth sores. The roots of sorrel can be eaten but are usually boiled and they have a starchy taste somewhat like a potato. Either way, this is a most Pleasing wild Edible to feast upon while out in Nature.
It also grows quite well in desert regions during the cooler months. Children seem to go gaga over this little plant, cause of the sour taste. My son, just loves eating this plant, although it can upset the tummy if eaten in high quantity.