Maritime chaparral is found within the Seashore primarily along the southwest facing slopes of Bolinas Ridge. There are also patches of this vegetation type along Inverness Ridge (see Vegetation Map). Maritime chaparral is found along the California coast from northern Santa Barbara County to Sonoma County. It is generally found within six to 12 miles from the coast. It is characterized by a relatively large number of rare and endemic species and is threatened by development pressure. At Point Reyes, this vegetation type covers approximately 400 acres according to the 1994 vegetation map. However, this should be considered just an estimate as this vegetation type occurs as a shifting mosaic with forest types and large areas of manzanita germinated after the 1995 Vision Fire and were not captured by the 1994 mapping process. Maritime chaparral at Point Reyes intergrades with mixed evergreen forest and is bordered by coast redwood (Sequoia sempervirens) groves and riparian woodlands, which occupy moist drainages. In some locations, maritime chaparral dominated by Bolinas Manzanita (Arctostaphylos virgata) is an early successional vegetation type and is eventually shaded out by bishop pine or Douglas-fir. In other locations, such as along Bolinas Ridge, maritime chaparral appears able to persist as the dominant vegetation type indefinitely. Common maritime chaparral species at Point Reyes include Eastwood's manzanita (Arctostaphylos glandulosa), glossyleaf manzanita (Arctostaphylos nummularia), chamise (Adenostoma fasciculatum), giant chinquapin (Chrysolepis chrysophylla), buckbrush (Ceanothus cuneatus), and chaparral pea (Pickeringia montana). Also of importance in this vegetation type are the rare species Bolinas Manzanita (Arctostaphylos virgata), Point Reyes ceanothus (Ceanothus gloriosus var. exaltatus), and Mason's ceanothus (Ceanothus masonii).