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Colonial Williamsburg’s Compton OakRicklin Brown shares fascinating details on the history of this landmark hybrid oak
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Species Spotlight: Quercus kotschyana O.SchwarzJean Stephan brings into focus a rare oak endemic to Lebanon
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Mark Frith: A Legacy of Ancient OaksSteve Potter reviews the career of Mark Frith, an artist who has created remarkable portraits of ancient oaks in the UK
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Registration for the 11th IOS Conference Now Open!You can now register for the Conference and associated Tours - click on "Read more" to access the Conference website for details
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IOS Announces Grant Awards for 2025Nineteen grant awards will fund critical research, conservation, and education initiatives aimed at preserving oak species and their habitats worldwide
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Species Spotlight: Quercus persica Jaub. & SpachParisa Panahi and Mehdi Pourhashemi train the follow spot on a rare Iranian oak
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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
Is Q. robur invading Q. petraea populations or is it the...Steve Potter | Apr 17, 2025
A rare species from the Zagros forests in IranWebsite Editor | Apr 17, 2025
The landmark oak was found as a naturally occurring hybridRicklin Brown | Apr 05, 2025Plant Focus
Latest Articles
The renowned Canadian botanist, whose work included oak hybrids, died on February 26, 2025
A team led by IOS member Marco Neves Marques has published an extensive literature review covering oak declines in Mediterranean-type climate regionsLatest Blog Posts
What you can find by searching for "International Oak Society" on YouTube
Back in September 2012, the UK’s BBC TV’s website reported on the recovery of a 5,000-year-old, 44ft (13.4m) Fenla
I would like to share with the IOS a project that should be of interest to members.
Who was Quercus grahamii named in honor of?
A 16th century commentary on the medicinal property of oaks and aconrsUpcoming Events
Thu, 2025-05-08 to Tue, 2025-05-13This multiday event will include visits to oak collections in Victoria, New South Wales, and Canberra.
Thu, 2025-05-15 to Sun, 2025-05-18This four-day event will feature visits to legendary Hackfalls Arboretum and Eastwoodhill Arboretum, the National Arboretum of New Zealand, among others.
Thu, 2025-05-29 to Sun, 2025-06-01It's high time we took another look at the Belgian oak collections. This time the event will take place over the Ascension weekend, 29 May–1 June 2025, four days.
Sat, 2025-06-07 to Sun, 2025-06-08The 2025 edition of the UK OODs will focus on the Fagaceae family and include visits to two collections in Cornwall.
Wed, 2025-06-25Maribel Arenas Navarro and Sven Bronckaers will present in this webinar.<The International Oak Society acknowledges the generous support of the following institutions:
Supporting Institutional Members
Standard Institutional Members
The International Oak Society acknowledges the generous support of the following institutions:
Supporting Institutional Members
Standard Institutional Members
Featured link
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
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International Oak Society
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Mercer Island, WA 98040
United States
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