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In Search of Quercus miyagii: A Field Report from Okinawa

By Elion Jam | February 16, 2026
Quercus miyagii acorn and dried leaves
A rare oak endemic to the Ryukyu Islands of Japan

Post-Conference Tour: Oaxaca

By Wally Wilkins | December 10, 2025
Group with Quercus macdougallii
Six days exploring Oaxaca’s oak diversity, as reported by Wally Wilkins.

IOS Tour of California, Part 1: Northern California

By Chris Reynolds | October 30, 2024
Group by Sequoiadendron giganteum

From Davis to Los Angeles

IOS Tour of California, Part 2: Southern California

By John Leszczynski | October 30, 2024
Group photo at Otay Mountains

From Los Angeles to the Otay Mountains

IOS Tour of Oregon, September 2023

By Website Editor | October 19, 2023
Tour Participants on Fiddler Peak

An account of the Tour guided by Sean Hogan

2022 Pre-Conference Tour: Western Texas

By Philip Crim | October 13, 2022
Group at salt flats near Guadalupe Mountains National Park

San Antonio to Las Cruces: oaks and more

2022 Pre-Conference Tour: New Mexico

By Mark Coggeshall | October 12, 2022
Group under Mangas Mountain Gambel oak

Oaks and other attractions, from Albuquerque to Las Cruces.

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)
"Oaks: the Backbone of Mexico" – New Documentary Film
A new documentary by Maricela Rodríguez Acosta
Website Editor | Feb 17, 2026
Quercus miyagii acorn and dried leaves
In Search of Quercus miyagii: A Field Report from Okinawa
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
Amit Zohran's "Oakollective"
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
Species Spotlight: Quercus canariensis Willd.
Antonio Lambe shares his views on this threatened oak native to Iberia and North Africa
Read more

Trip Reports

In Search of Quercus miyagii: A Field Report from Okinawa

By Elion Jam | February 16, 2026
Quercus miyagii acorn and dried leaves
A rare oak endemic to the Ryukyu Islands of Japan

Post-Conference Tour: Oaxaca

By Wally Wilkins | December 10, 2025
Group with Quercus macdougallii
Six days exploring Oaxaca’s oak diversity, as reported by Wally Wilkins.

IOS Tour of California, Part 1: Northern California

By Chris Reynolds | October 30, 2024
Group by Sequoiadendron giganteum

From Davis to Los Angeles

IOS Tour of California, Part 2: Southern California

By John Leszczynski | October 30, 2024
Group photo at Otay Mountains

From Los Angeles to the Otay Mountains

IOS Tour of Oregon, September 2023

By Website Editor | October 19, 2023
Tour Participants on Fiddler Peak

An account of the Tour guided by Sean Hogan

2022 Pre-Conference Tour: Western Texas

By Philip Crim | October 13, 2022
Group at salt flats near Guadalupe Mountains National Park

San Antonio to Las Cruces: oaks and more

2022 Pre-Conference Tour: New Mexico

By Mark Coggeshall | October 12, 2022
Group under Mangas Mountain Gambel oak

Oaks and other attractions, from Albuquerque to Las Cruces.

Pages

The International Oak Society acknowledges the generous support of the following institutions:

Supporting Institutional Members

Denver BG Logo
The Morton Arboretum logo
San Antonio Botanical Garden logo

 

Standard Institutional Members

Bartlett Tree Experts logo
Catalina Island Conservancy logo
Forrest Keeling Nursery logo
Houston Botanic Garden logo
Rice University
San Diego Botanic Garden logo
San Diego Zoo Wildlife Alliance logo
South Carolina Botanical Garden

 

The Huntington
The John Fairey Garden