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Stelian Radu, a founding member of the IOS, accomplished an impressive body of work in scientific research.
Originally described as a species, Quercus ×dysophylla is now considered to be of hybrid origin.
For over thirty years Bill Guion has pursued and photographed the live oaks of Louisiana.
Quercus look is one of the least-known oaks of the arid mountains of the Middle East. It grows on Mount Hermon and in the Anti-Lebanon...
Scientists in Poland have successfully micropropagated 500- to 800-year-old oaks and two of the saplings were planted in April.
Five-minute, fifteen-slide Lightning Talks were included for the first time in the IOS Conference at UC Davis, California. 
Posters were presented during the lunch break of the first day of the Conference at UC Davis, California.
A new association aims to raise and improve the status of the oak trees in Israel.
Lloyd Kenyon reviews a book on oaks by John Lewis-Stempel.
An article by Maria Fremlin describes the oak collection in Wivenhoe Park at the University of Essex, Colchester, in the United Kingdom.
Dr. Michael Avishai, a leading oak expert, botanist, and horticulturist in Israel and worldwide, passed away last December, leaving a huge...
Quercus ×morehus was initially called Abram’s oak by the author Albert Kellogg in his original 1863 description and was thought to be a...

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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

Stelian Radu, a founding member of the IOS, accomplished an impressive body of work in scientific research.
Originally described as a species, Quercus ×dysophylla is now considered to be of hybrid origin.
For over thirty years Bill Guion has pursued and photographed the live oaks of Louisiana.
Quercus look is one of the least-known oaks of the arid mountains of the Middle East. It grows on Mount Hermon and in the Anti-Lebanon...
Scientists in Poland have successfully micropropagated 500- to 800-year-old oaks and two of the saplings were planted in April.
Five-minute, fifteen-slide Lightning Talks were included for the first time in the IOS Conference at UC Davis, California. 
Posters were presented during the lunch break of the first day of the Conference at UC Davis, California.
A new association aims to raise and improve the status of the oak trees in Israel.
Lloyd Kenyon reviews a book on oaks by John Lewis-Stempel.
An article by Maria Fremlin describes the oak collection in Wivenhoe Park at the University of Essex, Colchester, in the United Kingdom.
Dr. Michael Avishai, a leading oak expert, botanist, and horticulturist in Israel and worldwide, passed away last December, leaving a huge...
Quercus ×morehus was initially called Abram’s oak by the author Albert Kellogg in his original 1863 description and was thought to be a...

Pages

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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