Links

Checklists & Taxonomy
	Oak Names Database The reference site for checking the status of oak names. The reasons for making this checklist public are primarily to (a) provide a listing of all Cultivar and Group names known to the Registrar (hopefully so as to avoid future duplications of a known name) and (b) to enlist further comment and...Visit site

Databases & Directories
	Quercus Portal Quercus Portal provides access to various databases regarding genetic and genomic resources and information. It includes also a dynamic user interface allowing the submission of complex queries across all data bases (Global Search). Additionally a static section of the portal is devoted to general...Visit site
	USDA Plant Hardiness Zone Map In January 2012, the USDA Agricultural Research Service released a new edition of the American Plant Hardiness Map. The previous edition was released in 1990. Two new zones 12 and 13 have been added to this 2012 edition. The zones are based on 1976-2055 weather data, that is 30 years of data. ...Visit site

Gardens & Arboreta
	Starhill Forest Arboretum A private arboretum located on 48 acres in southern Menard County, Illinois, Starhill was founded by Guy Sternberg, past president and board member of the oak society. Starhill Forest is now the official Arboretum of Illinois College, the oldest college in Illinois. Visit site
	"Trees for our Future" Campaign Launched by Eastwoodhill Arboretum Eastwoodhill, the National Arboretum of New Zealand, has launched the Trees for our Future campaign, which aims to increase its conservation programs and raise the funds required to cover the costs involved. Visit their new website for further details. Visit site
	Arboretum Wespelaar The Arboretum Wespelaar is the best private garden in Belgium. The Hufftington Post even ranked it as one of the best in the world. It was also one of the gardens visited on our Open Oak Day in 2011. Visit site
	Caerhays Estate Caerhays is an informal woodland garden in Cornwall, United Kingdom, overlooking the sea and extending to over 120 acres. The impressive collection at Caerhays includes exciting Chinese oaks, many of which are historic plants resulting from seed collected in the wild. Visit site
	The Morton Arboretum The Morton Arboretum has an extensive oak collection. It also hosted the first IOS Conference in 1994. Visit site
	The Oaks of Chevithorne Barton Launched in June 2011, this Web site allows to query the inventory of this UK National Collection for Quercus. Visit site

General Societies & Associations
	Life+ bioDehesa Life+ bioDehesa is overseeing a European project regarding the conservation and management of open oak woodland in Andalusia. Visit site

Editor's Picks

"Japanese oaks" planted at Coventry Cathedral

Steve Potter | Dec 21, 2025

Six days exploring Oaxaca’s oak diversity, as reported by...

Wally Wilkins | Dec 10, 2025

Oaks planted in circles as a continuation of the artwork...

Steve Potter | Dec 10, 2025

Chestnut-leaf oak in habitat and in cultivation

Checklists & Taxonomy
	Oak Names Database The reference site for checking the status of oak names. The reasons for making this checklist public are primarily to (a) provide a listing of all Cultivar and Group names known to the Registrar (hopefully so as to avoid future duplications of a known name) and (b) to enlist further comment and...Visit site

Databases & Directories
	Quercus Portal Quercus Portal provides access to various databases regarding genetic and genomic resources and information. It includes also a dynamic user interface allowing the submission of complex queries across all data bases (Global Search). Additionally a static section of the portal is devoted to general...Visit site
	USDA Plant Hardiness Zone Map In January 2012, the USDA Agricultural Research Service released a new edition of the American Plant Hardiness Map. The previous edition was released in 1990. Two new zones 12 and 13 have been added to this 2012 edition. The zones are based on 1976-2055 weather data, that is 30 years of data. ...Visit site

Gardens & Arboreta
	Starhill Forest Arboretum A private arboretum located on 48 acres in southern Menard County, Illinois, Starhill was founded by Guy Sternberg, past president and board member of the oak society. Starhill Forest is now the official Arboretum of Illinois College, the oldest college in Illinois. Visit site
	"Trees for our Future" Campaign Launched by Eastwoodhill Arboretum Eastwoodhill, the National Arboretum of New Zealand, has launched the Trees for our Future campaign, which aims to increase its conservation programs and raise the funds required to cover the costs involved. Visit their new website for further details. Visit site
	Arboretum Wespelaar The Arboretum Wespelaar is the best private garden in Belgium. The Hufftington Post even ranked it as one of the best in the world. It was also one of the gardens visited on our Open Oak Day in 2011. Visit site
	Caerhays Estate Caerhays is an informal woodland garden in Cornwall, United Kingdom, overlooking the sea and extending to over 120 acres. The impressive collection at Caerhays includes exciting Chinese oaks, many of which are historic plants resulting from seed collected in the wild. Visit site
	The Morton Arboretum The Morton Arboretum has an extensive oak collection. It also hosted the first IOS Conference in 1994. Visit site
	The Oaks of Chevithorne Barton Launched in June 2011, this Web site allows to query the inventory of this UK National Collection for Quercus. Visit site

General Societies & Associations
	Life+ bioDehesa Life+ bioDehesa is overseeing a European project regarding the conservation and management of open oak woodland in Andalusia. Visit site

The International Oak Society acknowledges the generous support of the following institutions:

Supporting Institutional Members

Standard Institutional Members