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Photographer Kyle Spradley has taken portraits of "The Big Tree" over the course of almost a decade, in every season and weather condition.
A possible finding of "the real deal" Quercus ×introgressa
Philip Schretter has amassed an interesting collection of oaks at the campus-wide arboretum at Armstrong State University.
An oak planted by the Duke of Wellington in 1820 is being propagated in honor of the bicentenary of the Battle of Waterloo.
Where were most oaks planted in Argentina during the last three years?
Bill Funk writes about his oak collection at Mereweather Arboretum in Victoria, Australia.  
Continuing our series Oak Artists, we look at portraits of ancient English oaks by California-based photographer Beth Moon.
This book is a thorough account of the 150-year tradition of Hillier’s and treats readers to the people, the places, and the plants that...
This unusual hybrid was described by Paul Thomson in 1977 from a location in Lafayette County, Missouri. 
Damaged scrub oak habitat in central Florida is being restored—one acorn at a time.
The aim of this brief essay by Francisco Vázquez is to set out the more frequently encountered morphological variations in the genus ...
In collaboration with BGCI and the IUCN/SSC Global Tree Specialist Group, The Morton Arboretum has launched a project to complete threat...

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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

Photographer Kyle Spradley has taken portraits of "The Big Tree" over the course of almost a decade, in every season and weather condition.
A possible finding of "the real deal" Quercus ×introgressa
Philip Schretter has amassed an interesting collection of oaks at the campus-wide arboretum at Armstrong State University.
An oak planted by the Duke of Wellington in 1820 is being propagated in honor of the bicentenary of the Battle of Waterloo.
Where were most oaks planted in Argentina during the last three years?
Bill Funk writes about his oak collection at Mereweather Arboretum in Victoria, Australia.  
Continuing our series Oak Artists, we look at portraits of ancient English oaks by California-based photographer Beth Moon.
This book is a thorough account of the 150-year tradition of Hillier’s and treats readers to the people, the places, and the plants that...
This unusual hybrid was described by Paul Thomson in 1977 from a location in Lafayette County, Missouri. 
Damaged scrub oak habitat in central Florida is being restored—one acorn at a time.
The aim of this brief essay by Francisco Vázquez is to set out the more frequently encountered morphological variations in the genus ...
In collaboration with BGCI and the IUCN/SSC Global Tree Specialist Group, The Morton Arboretum has launched a project to complete threat...

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