mountain cobblestone lichen

Acarospora elevata (mountain cobblestone lichen) is a shiny dark reddish brown to dark brown verrucose to aereolate crustose lichen that grows up to 3 cm (1.2 in) wide on granite in central and southern California to Baja California, and high elevations in the Rocky Mountains.:216–217 It is usually only found above 1,400 metres (4,600 ft) because it is eaten by red mites at lower elevations.:216–217 In the Californias, it is mostly found at high elevations (hence "elevata"), but sometimes...