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Boissier oak was originally named Quercus boissieri Reut. and later Quercus boissieri var. latifolia (Boiss.) Zohary, but the current...
A new study sheds light on why some oaks survived a recent multi-year outbreak of an invasive moth
The oak collection includes over 80 taxa
An attempt to settle the matter of this controversial name
Dr. Suresh Subedi, Assistant Professor at Arkansas Tech University, presented an ongoing project that analyzes herbarium specimens of oaks...
A guest article from renowned author Douglas Tallamy describes the key role native oaks play in sustaining biodiversity.
The Morton Arboretum and United States Botanic Garden (USBG) announce a new partnership to advance the conservation of threatened trees in...
The story of how the IOS logo came into being
A natural hybrid between Quercus lyrata (overcup oak) and Q. virginiana (Southern live oak)
First joint meeting of the Global Conservation Consortium for Oak (GCCO) in the Americas
Despite damage, the Lyytikkylä Oak is still the thickest oak in Finland
In Serbian tradition, in almost every village or hamlet there is at least one tree deemed by the inhabitants to be special.

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Editor's Picks

Quercus coccifera, 97 cm dbh and 15 m canopy spread
Images and insights from Ezra Barnea’s journey to Cyprus’s...
Ezra Barnea | Jun 13, 2026
Lainey Kirshberger and Ryan Silver, students at Oklahoma State University, participated in the fieldwork and will lead the genetic and epigenetic analysis under the supervision of Dr. Antonio R. Castilla.
Endangered oak Quercus hinckleyi shows strong genetic...
Website Editor | Jun 09, 2026
The current Red List status and modelled outlook for the eight Californian oak species, plus tanoak
New paper should significantly change our approach to...
Steve Potter | Jun 09, 2026

Plant Focus

Quercus orocantabrica
Roderick Cameron and Carlos Vila-Viçosa give an account of this intriguing species from northwestern Iberia with a complex taxonomic and...

All Articles

Boissier oak was originally named Quercus boissieri Reut. and later Quercus boissieri var. latifolia (Boiss.) Zohary, but the current...
A new study sheds light on why some oaks survived a recent multi-year outbreak of an invasive moth
The oak collection includes over 80 taxa
An attempt to settle the matter of this controversial name
Dr. Suresh Subedi, Assistant Professor at Arkansas Tech University, presented an ongoing project that analyzes herbarium specimens of oaks...
A guest article from renowned author Douglas Tallamy describes the key role native oaks play in sustaining biodiversity.
The Morton Arboretum and United States Botanic Garden (USBG) announce a new partnership to advance the conservation of threatened trees in...
The story of how the IOS logo came into being
A natural hybrid between Quercus lyrata (overcup oak) and Q. virginiana (Southern live oak)
First joint meeting of the Global Conservation Consortium for Oak (GCCO) in the Americas
Despite damage, the Lyytikkylä Oak is still the thickest oak in Finland
In Serbian tradition, in almost every village or hamlet there is at least one tree deemed by the inhabitants to be special.

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