View photos of the edible plant, Barbarea vulgaris (Wintercress), profiled in the Wild Edible Series: Arkansas, Colorado, Kansas, Utah, and Wyoming.

A passage from Wild Edible Plants of Colorado:

Two Wintercress species are found in Colorado – non–native Barbarea vulgaris, and native B. orthoceras. The non–native species is a bit more common than the other. They are similar in appearance and found at elevations of 5500’–9500’, almost always in moist/lower–lying soils.