Log in

You are here

Animals, plants, and fungi depend on this humble tree, but its future—and theirs—is all but certain.
Together with her husband Mark, Jolly helped establish and maintain the Oak Conservation and Research Fund, created by the IOS in 2019.
Oaks found close to the 70th parallel north
A new entry in our series on Oak Poetry, this poem by Antonio Machado describes the holm oaks of
A Red Oak (Section Lobatae) endemic to inland ranges of northern Baja California, Mexico
Action Oak is a unique collaboration of charities, governments, landowners, and research institutions dedicated to protecting native UK...
One of the more well-known Mexican oaks in cultivation.
An interview with Portuguese oak conservationist Dr. Carlos Vila-Viçosa.
An update on the Oak Conservation and Research Fund appeal.
Continuing our series of posts of poems that feature oaks: a haiku by the legendary Japanese poet Matsuo Bashō (1644–1694).
An eloquent symbol features a stylized oak tree
Hayrettin Karaca, an IOS member and one of Turkey's best-known environmentalists, died January 20 at the age of 97.

Pages

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

Animals, plants, and fungi depend on this humble tree, but its future—and theirs—is all but certain.
Together with her husband Mark, Jolly helped establish and maintain the Oak Conservation and Research Fund, created by the IOS in 2019.
Oaks found close to the 70th parallel north
A new entry in our series on Oak Poetry, this poem by Antonio Machado describes the holm oaks of
A Red Oak (Section Lobatae) endemic to inland ranges of northern Baja California, Mexico
Action Oak is a unique collaboration of charities, governments, landowners, and research institutions dedicated to protecting native UK...
One of the more well-known Mexican oaks in cultivation.
An interview with Portuguese oak conservationist Dr. Carlos Vila-Viçosa.
An update on the Oak Conservation and Research Fund appeal.
Continuing our series of posts of poems that feature oaks: a haiku by the legendary Japanese poet Matsuo Bashō (1644–1694).
An eloquent symbol features a stylized oak tree
Hayrettin Karaca, an IOS member and one of Turkey's best-known environmentalists, died January 20 at the age of 97.

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