Ornithostaphylos oppositifolia, aka Palo Blanco, aka Baja Bird Bush
(Click on underlined title to see more photos and more description)(two upper photos by Bri Weldon) Twenty footer growing at Rancho Santa Ana Botanic Garden near Pomona. Native from northwestern Baja to barely on the U.S. side of the border near San Ysidro. With adequate water and wind protection can get to around 20 feet, growing about six inches to one foot per year. Has beautiful white bark for the majority of the year, and tends to turn light brownish during the coolest months. Small white flowers, not showy. Interesting looking big bush to small tree if you can be patient to let it do so, with a helpful amount of water to boost its rate of growth, mainly during December through April, though still necessary through the dry months in lighter amounts to best encourage tree like development. 'Aerial broadcast' watering, such as from some sort of sprinkler, is generally best to maintain a lighter more aerated soil profile in the root size, than if watered by a running hose on the ground, though that could work too. Reason for the consideration is to minimize chance of root rot, which can be true for any dry land native plant,.. and, again, aerial broadcast watering is the preferred safest means of watering to minimize chance of rot and to maximize optimum growth rates for human interests.
Photo below apparently inland of Ensenada, Baja Norte: