The Yellow Woodsorrel is considered a weed of gardens, fields and lawns. Small, less than 6 inches high and heart shaped leaves about 1/2 wide, the entire plant is edible. It blooms with small yellow flowers from June to October. The leaves and stems are sour tasting lending its common name sourgrass or pickle plant. The leaves are rich in vitamin C and can be used in salads or brewed to make a tasty beverage with a similar to lemonade. Past practical uses includes extracting the juice from the greens as a substitute for vinegar. At night, the leaves curl up and open during the day.