Red Sorrel in the Sulfur Hills

This capture of a hillside covered in red sorrel really shows it's ability to take over an area. Red sorrel thrives in areas where the soil is acidic. This area of Yellowstone National Park is known as the sulfur hills for the countless sulfur vents. The abundant sulfur in the area means the pH of the soil is on the acidic side, giving great conditions for red sorrel to take over the landscape.