International Oak Society
An active society of professional, amateur, and academic oak enthusiasts from around the world. Conferences are held every three years. The mission of the society is to further the study, sustainable management, preservation, appreciation and dissemination of knowledge about the genus Quercus and its ecosystems.
A collection of forest health, natural resources, and silviculture images compiled by the University of Georgia and the USDA Forest Service. They have many great oak images.
National Register of Big Trees
American Forests' National Register of Big Trees documents the largest individuals of over 825 tree species growing in the United States. Since 1940, citizens have helped find and register these national champions. There is a downloadable PDF of the annual big tree register on this website, and many oaks are represented.
Pests and Diseases:
California Oak Mortality Task Force
This web site provides the latest news on Sudden Oak Death (Phytopthera ramorum), a fungal disease that has caused significant mortality of tanoaks, coast live oaks, California black oaks, Shreve oaks, and canyon live oaks in California.
Nomenclature and Taxonomy:
For additional resources, please see list of taxonomic references and authorities on profile page.
Kew World Checklist
This plant name resource started in 1994 as a checklist of accepted names in the genus Quercus. It has since grown to encompass many other plant groups. In addition to being a resource for accepted names, the database also includes related information, such as the author, place of publication, full synonymy, geographical distribution and life form.
ITIS (Integrated Taxonomic Information System)
A source of taxonomic information on plants, animals, fungi, and microbes of North America and the world. The site is sponsored by a partnership of U.S., Canadian, and Mexican agencies; other organizations; and taxonomic specialists.
Cultivated Oak Name Database
The International Oak Society is the International Cultivar Registration Authority for the genus Quercus. This database includes names of oak species and hybrids in cultivation and will eventually include descriptive and historical information on oak cultivars.
BGCI Red List of Oaks
The Red List of Oaks, published jointly by Botanic Gardens Conservation International (BGCI) and Fauna & Flora International (FFI), through the Global Trees Campaign (GTC), identifies 78 wild oaks as being in danger of extinction, from a global total of over 500 species. Profiles of threatened species include description of habitat and conservation threats.