An often fatal disease of American sycamore (Platanus occidentalis), known as canker stain, is caused by the fungus, Ceratocystis fimbriata f.sp. platani. This fungus, indigenous to the United States, occurs in urban and forested areas from New Jersey to Georgia and west to Missouri and Louisiana. Other trees affected are the Oriental plane (Platanus orientalis) and London plane (Platanus acerifolia). The disease is most devastating to young trees that may die within two years after becoming infected. Older trees, such as large urban sycamores, usually die slowly over many years.