Over 640 species of plants occur in Mesa Verde National Park. These include approximately 556 species of vascular plants, 75 species of fungi, 21 species of moss, and 151 species of lichen. In addition, a number of rare endemic species occur in Mesa Verde that are found nowhere else. There are also about 80 species of non-native plants that have invaded the park, some of which have been classified as invasive, noxious weeds which, by law, means they must be controlled.