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Two oaks elected tree of the year 2013
Posted Sat, 2013-08-03 17:24 in Charles Snyers d'Attenhoven's blog
Michel Timacheff, IOS Member and photographer, came across an old oak near Villers-sur-Lesse in southern Belgium.  Its circumference is over 6 meters at BH. 
Posted Thu, 2013-05-02 11:06 in Charles Snyers d'Attenhoven's blog
Dan Hinkely will be speaking at the 2013 Annual Meeting of the Magnolia Society, next April 19th- 21st.
Posted Sun, 2013-03-03 18:34 in Charles Snyers d'Attenhoven's blog
In January 2012, the USDA Agricultural Research Service released a new edition of the American Plant Hardiness Map.  The previous edition was released in 1990.  Two new zones 12 and 13 have be
Posted Sun, 2012-09-16 11:34 in Charles Snyers d'Attenhoven's blog
Chevithorne Barton in Devon is home to one of the two UK National Collection for the genus Quercus. It was built by IOS member Michael Heathcoat Amory.
Posted Sat, 2011-07-02 20:09 in Charles Snyers d'Attenhoven's blog

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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

CSA's blog

Two oaks elected tree of the year 2013
Posted Sat, 2013-08-03 17:24 in Charles Snyers d'Attenhoven's blog
Michel Timacheff, IOS Member and photographer, came across an old oak near Villers-sur-Lesse in southern Belgium.  Its circumference is over 6 meters at BH. 
Posted Thu, 2013-05-02 11:06 in Charles Snyers d'Attenhoven's blog
Dan Hinkely will be speaking at the 2013 Annual Meeting of the Magnolia Society, next April 19th- 21st.
Posted Sun, 2013-03-03 18:34 in Charles Snyers d'Attenhoven's blog
In January 2012, the USDA Agricultural Research Service released a new edition of the American Plant Hardiness Map.  The previous edition was released in 1990.  Two new zones 12 and 13 have be
Posted Sun, 2012-09-16 11:34 in Charles Snyers d'Attenhoven's blog
Chevithorne Barton in Devon is home to one of the two UK National Collection for the genus Quercus. It was built by IOS member Michael Heathcoat Amory.
Posted Sat, 2011-07-02 20:09 in Charles Snyers d'Attenhoven's blog

Pages

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

Supporting Institutional Members

 

Standard Institutional Members

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

 

The Huntington
The John Fairey Garden