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Marcescent leaves persist on deciduous trees through winter.
A guest post by Matt Candeias, host of the In Defense of Plants podcast and blog
One of the world's leading oak collections is located in Basque Country, northern Spain.
An homage to the oak tree and the important role it plays today, in our landscape and in our lives
The Global Conservation Consortium for Oak (GCCO) sent out their first quarterly newsletter in late July.
A massive Quercus robur stands outside the village of Mercheașa, a quiet rural locality in central Romania.
A 691-acre arboretum in Great River, New York, USA, with a collection of native and non-native oaks.
Six oak cultivars originally described by Jef Van Meulder in 2014.
An article published in Scientific American recounts how advances in genomics have allowed researchers to reconstruct the evolutionary...
One of the largest oaks at Melbourne’s Royal Botanic Gardens has fallen.
Researchers have unearthed a collection of chinquapin fruit and leaf fossils in Patagonia that suggests the Fagaceae family has...
Mightywild.com provides an insight into the trials and tribulations of an edible acorn startup.

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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

Marcescent leaves persist on deciduous trees through winter.
A guest post by Matt Candeias, host of the In Defense of Plants podcast and blog
One of the world's leading oak collections is located in Basque Country, northern Spain.
An homage to the oak tree and the important role it plays today, in our landscape and in our lives
The Global Conservation Consortium for Oak (GCCO) sent out their first quarterly newsletter in late July.
A massive Quercus robur stands outside the village of Mercheașa, a quiet rural locality in central Romania.
A 691-acre arboretum in Great River, New York, USA, with a collection of native and non-native oaks.
Six oak cultivars originally described by Jef Van Meulder in 2014.
An article published in Scientific American recounts how advances in genomics have allowed researchers to reconstruct the evolutionary...
One of the largest oaks at Melbourne’s Royal Botanic Gardens has fallen.
Researchers have unearthed a collection of chinquapin fruit and leaf fossils in Patagonia that suggests the Fagaceae family has...
Mightywild.com provides an insight into the trials and tribulations of an edible acorn startup.

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