The flora is distinct from that of 'mainland' Mexico across the Gulf of California to the east, and shares many species with the Laguna Mountains and Cuyamaca Mountains, also Peninsular Ranges, in San Diego County, California. Typical conifer species include white fir, sugar pine and Jeffrey pine. The canyons of the lower eastern Sierra de Pedro Mártir are the southern range demarcation of natural California fan palm (Washingtonia filifera) distribution. Arizona cypress (Cupressus arizonica) can be found with Canyon live oaks (Quercus chrysolepis) and California fan palms.