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Large oaks have been declared "botanical monuments of nature" 
Long-time IOS member Henry "Weeds" Eilers died November 13, 2024.
An artist who has created remarkable portraits of ancient oaks in the UK
Steve Potter reviews decline diseases affecting oaks in the UK.
A review of Andrew Hipp's new book
Parisa Panahi and Mehdi Pourhashemi train the follow spot on a rare Iranian oak
An extract from Oak, a book by British poet Katharine Towers
This work of art is arguably the most significant depiction of an oak in 20th century art.
The Tree of the Year Association in Germany selected a non-native species.
A report on the Tour that took place in October
Some personal observations of this rare oak in southwestern Turkey
A  little-known species from the northern Zagros forests of Iran

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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

Large oaks have been declared "botanical monuments of nature" 
Long-time IOS member Henry "Weeds" Eilers died November 13, 2024.
An artist who has created remarkable portraits of ancient oaks in the UK
Steve Potter reviews decline diseases affecting oaks in the UK.
A review of Andrew Hipp's new book
Parisa Panahi and Mehdi Pourhashemi train the follow spot on a rare Iranian oak
An extract from Oak, a book by British poet Katharine Towers
This work of art is arguably the most significant depiction of an oak in 20th century art.
The Tree of the Year Association in Germany selected a non-native species.
A report on the Tour that took place in October
Some personal observations of this rare oak in southwestern Turkey
A  little-known species from the northern Zagros forests of Iran

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