Quercus suber (Cork Oak)
Native: West Mediterranean countries
Location: Found in collections and now grown for its bark in California and other southern states.
The remarkable feature of this oak is the thick cork bark. in Spain and Portugal it is stripped off every ten years to provide most of the world's cork. In its native environment is often small and stunted.
Leaves are dark glossy green above and clothed in grey felt below, 2.5-6.2cm long.
Flowers are found at the end of May or beginning of June, the females are in lead axils of the new growth.
Acorns form in one year and fall in October, 1.2-3cm long.