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
Quercus sontraensis grows in the Son Tra Peninsula
Roderick Cameron
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Oct 19, 2022
We know that some oaks, particularly Quercus robur, can...
Allen Coombes
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Oct 18, 2022
Service awards recognize contributions to genus Quercus and...
Shaun Haddock
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Oct 14, 2022
Plant Focus
Latest Articles
The 3rd IOS Silent Auction was another huge success
Seedlings from imported acorns planted out in Australia
Latest Blog Posts
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
A Latvian oak enthusiast shares his composition that aims to express the idea of an oak tree.
Filmmakers have not shown oaks in their portrayals of Birnam Wood.
A catalog of Paco's photos and descriptions of Fagaceae at the Iturraran Botanical Garden
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...
