Sierra de San Pedro Mártir contains several coniferous species; the most abundant are: Pinus lambertiana, Pinus quadrifolia, Pinus jeffreyi, Abies concolor, and species of Cupressus mostly found in the higher elevations. The flora is distinct from the flora of the rest of Mexico, and shares many species with the Laguna Mountains and San Jacinto Mountains in southwest California. The lower elevations of the Sierra de San Pedro Mártir are defined by chaparral and desert shrub. Sierra de San Pedro Mártir is a southern demarcation of the distribution of the California fan palm, Washingtonia filifera.