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In October 2015, after visiting the Polly Hill Arboretum on Martha’s Vineyard and before attending the 8th International Oak Society Conference in Lisle, Tim Boland, the Director of Polly Hill,...
Posted Sat, 2017-03-25 12:48 in Béatrice Chassé's blog
This year a great number of species are producing acorns for the first time. 
Posted Sun, 2016-07-31 15:35 in Béatrice Chassé's blog
The Arboretum des Pouyouleix (the French National Collection for the genus Quercus) now has a website. Many parts are still under construction, notably the accessions list.
Posted Sun, 2015-04-19 07:00 in Béatrice Chassé's blog
Q. crassifolia Bonpl. puts on record growth in Arboretum des Pouyouleix
Posted Thu, 2014-11-20 11:23 in Béatrice Chassé's blog
Jurupa Hills oak may be California's oldest plant Researchers from UC Davis and UC Riverside say the 75-foot-wide Palmer's oak shrub has lived about 13,000 years despite inhospitabl
jurupa_oak_2.jpg
Posted Tue, 2010-01-05 13:07 in Béatrice Chassé's blog
If you participated in the International Oak Society's 6th Triennial Conference in Puebla, you probably have fond memories, interesting ideas and helpful suggestions to share with f
Posted Tue, 2009-11-03 10:55 in Béatrice Chassé's blog

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

BCH's blog

In October 2015, after visiting the Polly Hill Arboretum on Martha’s Vineyard and before attending the 8th International Oak Society Conference in Lisle, Tim Boland, the Director of Polly Hill,...
Posted Sat, 2017-03-25 12:48 in Béatrice Chassé's blog
This year a great number of species are producing acorns for the first time. 
Posted Sun, 2016-07-31 15:35 in Béatrice Chassé's blog
The Arboretum des Pouyouleix (the French National Collection for the genus Quercus) now has a website. Many parts are still under construction, notably the accessions list.
Posted Sun, 2015-04-19 07:00 in Béatrice Chassé's blog
Q. crassifolia Bonpl. puts on record growth in Arboretum des Pouyouleix
Posted Thu, 2014-11-20 11:23 in Béatrice Chassé's blog
Jurupa Hills oak may be California's oldest plant Researchers from UC Davis and UC Riverside say the 75-foot-wide Palmer's oak shrub has lived about 13,000 years despite inhospitabl
jurupa_oak_2.jpg
Posted Tue, 2010-01-05 13:07 in Béatrice Chassé's blog
If you participated in the International Oak Society's 6th Triennial Conference in Puebla, you probably have fond memories, interesting ideas and helpful suggestions to share with f
Posted Tue, 2009-11-03 10:55 in Béatrice Chassé's blog

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