Quercus lobata | Malibu Hills
Looking at Q. lobata in coastal southern California, subtle differences are noted from trees observed in coastal northern California. The trees in SoCal typically have a much more upright growth habit, as shown in this photo. You can find similarly upright Q. lobata in NorCal, but there they are rare, rather than the rule. The foliage of the SoCal trees has a distinctly bluish shade not seen in the typical NorCal Valley Oaks. But, interestingly, the SoCal Valley Oaks look a lot like the rare Q. lobata which can be found at elevation in the Santa Cruz Mountains. These trees, growing at 2,000 feet or great, share a great resemblance to the SoCal Valley Oaks.