Male flowers are in catkins, elongating in the spring, females are borne singly a bit further back from the ends.
Stems are grayish or copper colored, hairy, and often take on a dark color as seen in this image.
Bark is checked in small pieces.
Older trunks are way cool.
Misidentification: Look for the white undersides of the leaves. Also, something caused the stems and older leaves to look like they have sooty mold but there does not seem to be any insects.
Q. suber also has a light colored leaf underside but the leaves are smaller, more blue and the bark is key.
Location: San Lorenzo Park by the pond is a nice specimen and while you are there look at the cork oaks.