Island Oaks
From Islapedia
Island Oaks (Quercus tomentella) are the rarest of all California oak trees. They are found only on some of the California Channel Islands and on Guadalupe Island, Mexico. The island oak is a relict of an ancient California when the climate was warmer and more moist.
They are found naturally on five of the eight islands: Santa Cruz Island, Santa Rosa Island, Anacapa Island, Santa Catalina Island and San Clemente Island.