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
A long-standing member of the IOS and fomer editor of Oak...
Panayoti Kelaidis
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Dec 17, 2022
A new study resolves many nomenclatural problems in the...
Carlos Vila-Viçosa
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Dec 09, 2022
Christy Powell of the San Diego Zoo Wildlife Alliance works...
Amy Byrne
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Dec 06, 2022
Plant Focus
A rare oak endemic to the Sierra Juárez in Oaxaca
Latest Articles
A sonnet written by the English Romantic poet in support of the Spanish people during the Peninsular War
The 3rd IOS Silent Auction was another huge success
Latest Blog Posts
IOS founding member and oak doyen Guy Sternberg was interviewed by Vanessa Ferguson for NPR Illinois.
Many oaks have been planted as memorial trees near the Capitol
We know that some oaks, particularly Quercus robur, can produce forms with unusually cut leaves.
Being a lover of nature and photography, I often saunter around in a narrow mountain ridge in Pretoria, South Africa, with the purpose of getting some exercise, enjoying nature and photography, and
Clearing up the confusion
Upcoming Events
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Centenary celebrations related to the First World War (1914-1918) will be taking place throughout the 2014-2018 period, but 2015 will likely see the most important celebration in Australia and New...
The fruits of Quercus are a source of energy that serves to generate new individuals, thanks to the energy content stored in the cotyledons. The cotyledons join forces with the embryo to generate new...
A Pleistocene Clone of Palmer's Oak Persisting in Southern California
The distribution of Palmer's oak (Quercus palmeri Engelm.) includes numerous isolated populations that are presumably relicts...
For upwards of twenty years I have been planting oaks at the Arboretum de la Bergerette in southwest France, during which time at least 200 species of oak have already been trialed outdoors, and...
Sometimes one encounters a single, isolated individual tree, thriving in a private collection as the only representative of its species. The proud owner admires and perhaps even pampers it. But...
