by Francisco Garín and José Almandoz
Jardín Botánico de Iturraran, Spain
Originally published in Oak News & Notes, Vol. 19, No. 1
The genus Quercus includes around 450 species distributed across the Temperate and Subtropical Zones of the Northern Hemisphere. Many species are practically unobtainable in commercial nurseries, and for that reason it is very difficult to create new collections that include species other than the more ordinary ones.