Lemonade berry (Rhus intergrifolia) is an endemic plant species in the California Floristic Province. It gets its common name from the sharp, tart taste of its berries. Native American people used the berries and leaves in several ways. One included soaking the berries in water to create a tart beverage.
The Vasquez Rocks in northern Los Angeles County are the result of the erosion of the San Gabriel Mountains and subsequent uplift and erosion along smaller fault systems. The angle of tilt on the layers of sedimentary rock exposed in this formation is a testament to forces involved in the process of mountain building when two of the Earth's tectonic plates grind against each other.