Joshua Tree National Park in southeastern California is named for the Joshua trees (Yucca brevifolia) native to the park. It covers a land area of 790,636 acres (1,235.37 sq mi; 3,199.59 km2—an area slightly larger than the state of Rhode Island. The park includes parts of two deserts, each an ecosystem whose characteristics are determined primarily by elevation: the higher Mojave Desert and lower Colorado Desert.