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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.

2022 Post-Conference Tour: Arizona

By Wally Wilkins | October 12, 2022
Group at Tortilla Flat

Four days with the oaks of Arizona

Editor's Picks

Michel Gandoger in an albumen silver print dated 18 March 1876, dedicated on the reverse to Roberto de Visiani - Image: PHAIDRA University of Padova Attribution-NonCommercial-ShareAlike 4.0 International
Gandoger the Memorious
While working on a list of synonyms of European White...
Roderick Cameron | Aug 24, 2026
Cover of Select Native Asian Oaks Gap Analysis
Conservation Gap Analysis of Select Native Asian Oaks
Report led by The Morton Arboretum will help prioritize oak...
Website Editor | Aug 06, 2026
A1's 2024 crop of acorns
Early Fruiting Quercus robur in Slovakia
Motivation I live in the village of Dolné Dubové...
Jozef Čapkovič | Jul 20, 2026

Plant Focus

Quercus afares, Kew, © James MacEwen
Species Spotlight: Quercus afares Pomel
The only oak species endemic to Africa is rare in cultivation. It shouldn't be.
Read more

IOS Tours

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.

2022 Post-Conference Tour: Arizona

By Wally Wilkins | October 12, 2022
Group at Tortilla Flat

Four days with the oaks of Arizona

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

The John Fairey Garden

Standard Institutional Members

Bartlett Tree Experts logo
Catalina Island Conservancy
Forrest Keeling Nursery logo
Houston Botanic Garden logo
KOAGI logo
Oak Spring Foundation
Rice University
San Diego Botanic Garden logo
San Diego Zoo Wildlife Alliance logo
South Carolina Botanical Garden
The Huntington