Wright created his own word to describe his California residential architecture: "Romanza." This term implied that his California residences were designed to blend in with their romantic settings in individual ways, taking into account the unique beauty of each site. These sites included the redwood- and live oak-covered hills in the San Francisco Bay Area, the scrub brush-crested dunes of Southern California deserts, the palm trees and lush flowers of the Hollywood Hills, the semitropical coastal vegetation of Santa Barbara, and the golden rolling hills of the Central Valley. In each of these sites, Wright used local building materials whenever feasible, in keeping with his emphasis on giving his architecture an organic quality, so that it seems to become a part of nature rather than trying to dominate it. These natural materials included pink Sonoma stone facing along exterior walls; polished redwood paneling in living rooms, dining rooms, and ceilings, as well as for framing doors and windows; stucco covering along exterior walls in Southern California; and yellow or red brick facing around entrances in Northern California. stucco covering along exterior walls in Southern California; and yellow or red brick facing around entrances in Northern California. stucco covering along exterior walls in Southern California; and yellow or red brick facing around entrances in Northern California. stucco covering along exterior walls in Southern California; and yellow or red brick facing around entrances in Northern California.