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Red Oaks Updated on Trees and Shrubs OnlineTrees and Shrubs Online has announced the publication of its updated treatment of the cultivated oak species in Quercus Section Lobatae.
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Species Spotlight: Quercus orocantabricaAn intriguing species from northwestern Iberia with a complex taxonomic and nomenclatural history
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Taxonomists Huddle at HarvardThe Harvard University Herbaria hosted a novel Oak Taxonomy Workshop
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OC&R 2025 AppealThe IOS has launched the 2025 Appeal for the Oak Conservation and Research Fund
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Join the IOS today!
Since 1992 the International Oak Society has been bringing together oak enthusiasts from around the world. Born from a shared desire to exchange Quercus seed, the IOS has grown in many directions. Our mission: to further the study, sustainable management, preservation, appreciation and dissemination of knowledge about the genus Quercus and its ecosystems.
To join the IOS, you first need to subscribe to The Cupule, our free e-bulletin, by clicking on the button below. Then log in using the username and password you created and you will find instructions to join the IOS on the home page.
To read about membership rates and benefits, click on "Learn More" below.
Editor's Picks
The Harvard University Herbaria hosted a novel Oak Taxonomy...Jeannine Cavender-Bares | Apr 21, 2026
Visits to three collections of Quercus in Buenos Aires...Morgan Santini | Apr 05, 2026
On April 1st, the very day he turned 103, a great friend...Francisco Garin Garcia | Apr 05, 2026Plant Focus
Roderick Cameron and Carlos Vila-Viçosa give an account of this intriguing species from northwestern Iberia with a complex taxonomic and...Latest Articles
Portuguese researchers have modelled the likely range response of three species to climate change.
The report brings together key information, monitors data, and reviews existing work, while identifying important evidence gaps.
IOS member Elif Deniz Ülker has co-authored a paper on the likely future range of six European oaksLatest Blog Posts
Trees and Shrubs Online has announced the publication of its updated treatment of the cultivated oak species in Quercus Section Lobatae.
Below are some brief summaries of research reports carried out in partnership with the UK Forestry Commission’s research arm, Forest Research.
Help sought for silvopasture research
Over U$S 2,000 raised for student scholarships
After receiving his Special Service Award from the IOS, Prof.Upcoming Events
Sat, 2026-05-16 to Sun, 2026-05-17The 2026 edition of the UK OODs will feature visits to two oak collections in southeastern England.
Thu, 2026-05-28The IOS is pleased to announce our next virtual event, again co-hosted with the Global Conservation Consortium for Oak (GCCO)
Mon, 2026-09-21 to Mon, 2026-09-287-day journey through some of Türkiye’s diverse ecoregions
Thu, 2026-10-15 to Thu, 2026-10-22The Tour will focus on Georgia and Alabama, with incursions into South Carolina and northern Florida.The International Oak Society acknowledges the generous support of the following institutions:
Supporting Institutional Members
Standard Institutional Members
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Trees and Shrubs Online is a truly modern reference to temperate trees and shrubs. Currently there are articles for some 730 genera and 4,500 species, including many subspecies, forms and cultivars.User login
The International Oak Society acknowledges the generous support of the following institutions:
Supporting Institutional Members
Standard Institutional Members
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International Oak Society
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United States
Contact us by email: postmaster@internationaloaksociety.org
