Tree Blog

Quercus kelloggii x wislizenii | Central Valley

One possible way to introduce Q. kelloggii genetics to areas where the typical species does not perform well is to find hybrid forms of Black Oak which have formed with trees that do withstand a given set of conditions. This photo shows an example of Oracle Oak, a famous hybrid of Black Oak, Q. kelloggii x wislizenii. In this case it appears that the Interior Live Oak, Q. wislizenii, was the mother tree. Black Oak also forms hybrids with various forms of the Coast Live Oak, Q. agrifolia. Coast Live Oak has the ability to withstand a fair degree of summer humidity without disease so a cross of the two has potential to make a lovely oak with Q. kelloggii genetics that can be brought into the coastal cities of California.

Dave Muffly