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The 3rd IOS Silent Auction was another huge success
Quercus sontraensis grows in the Son Tra Peninsula
Seedlings from imported acorns planted out in Australia
Order yours today!
Shout out to the 12 IOS members who organized the Conference and Tours
Service awards recognize contributions to genus Quercus and to the IOS
San Antonio to Las Cruces: oaks and more
Oaks and other attractions, from Albuquerque to Las Cruces.
Four days with the oaks of Arizona
The traditional triennial gathering took place in the shadows of the Organ Mountains.
An oak found only on a volcano in Costa Rica
A single specimen found!

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Editor's Picks

Past IOS President Allen Coombes, Curator of Scientific Collections at Puebla University Botanic Garden, discusses leaf variability in Quercus ceirpes (still image from the documentary)
A new documentary by Maricela Rodríguez Acosta
Website Editor | Feb 17, 2026
Quercus miyagii acorn and dried leaves
A rare oak endemic to the Ryukyu Islands of Japan
Elion Jam | Feb 16, 2026
A moss-covered oak (Quercus orocantabrica) in Mata de Albergaria, Peneda-Gerês National Park, Portugal  © Amit Zoran
Steve Potter reviews a new book that features oaks
Steve Potter | Feb 11, 2026

Plant Focus

Quercus canariensis in Cornwall Park, Epsom, Auckland, New Zealand, the champion specimen in New Zealand, planted in the 1920s, 27.2 m tall with a trunk diameter of 209 cm (G. Collett pers. comm. 2026)  © Gerald Collett
Antonio Lambe shares his views on this threatened oak native to Iberia and North Africa

All Articles

The 3rd IOS Silent Auction was another huge success
Quercus sontraensis grows in the Son Tra Peninsula
Seedlings from imported acorns planted out in Australia
Order yours today!
Shout out to the 12 IOS members who organized the Conference and Tours
Service awards recognize contributions to genus Quercus and to the IOS
San Antonio to Las Cruces: oaks and more
Oaks and other attractions, from Albuquerque to Las Cruces.
Four days with the oaks of Arizona
The traditional triennial gathering took place in the shadows of the Organ Mountains.
An oak found only on a volcano in Costa Rica
A single specimen found!

Pages

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

Supporting Institutional Members

 

Standard Institutional Members

Rice University
San Diego Botanic Garden logo
San Diego Zoo Wildlife Alliance logo
South Carolina Botanical Garden

 

The Huntington
The John Fairey Garden