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Taxonomists Huddle at Harvard

Group photo at Harvard Herbarium
The Harvard University Herbaria hosted a novel Oak Taxonomy Workshop.

In Memoriam: Michel Duhart (1923–2026)

Michel Duhart and Paco Garin at Jardín Botánico Wilson, Costa Rica
On April 1st, the very day he turned 103, a great friend and an even better person, Michel Duhart, the oak enthusiast, passed away.

"Oaks: the Backbone of Mexico" – New Documentary Film

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

IOS Service Awards Presented at the 11th IOS Conference

Special Service Award plaque
Plaques presented during the Gala Dinner in Oaxaca

The 11th IOS Oak Conference in Oaxaca

Group photo at Oaxaca Conference
140 participants from 20 countries attended the Triennial Conference

New Board Candidates

Four headshots

Four IOS members have volunteered to serve on the Board of Directors during the 2025–2028 term. Together with seven Directors from the current Board who have chosen to remain on the Board for the next term, they will stand as candidates to be elected at the Meeting of Members to be held on October 6th during the 11th IOS Conference in Oaxaca, Mexico. You can learn more about the four new candidates by reading their statements below.

Pages

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
While working on a list of synonyms of European White...
Roderick Cameron | Aug 24, 2026
Cover of Select Native Asian Oaks Gap Analysis
Report led by The Morton Arboretum will help prioritize oak...
Website Editor | Aug 06, 2026
A1's 2024 crop of acorns
Motivation I live in the village of Dolné Dubové...
Jozef Čapkovič | Jul 20, 2026

Plant Focus

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

Society News

Taxonomists Huddle at Harvard

Group photo at Harvard Herbarium
The Harvard University Herbaria hosted a novel Oak Taxonomy Workshop.

In Memoriam: Michel Duhart (1923–2026)

Michel Duhart and Paco Garin at Jardín Botánico Wilson, Costa Rica
On April 1st, the very day he turned 103, a great friend and an even better person, Michel Duhart, the oak enthusiast, passed away.

"Oaks: the Backbone of Mexico" – New Documentary Film

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

IOS Service Awards Presented at the 11th IOS Conference

Special Service Award plaque
Plaques presented during the Gala Dinner in Oaxaca

The 11th IOS Oak Conference in Oaxaca

Group photo at Oaxaca Conference
140 participants from 20 countries attended the Triennial Conference

New Board Candidates

Four headshots

Four IOS members have volunteered to serve on the Board of Directors during the 2025–2028 term. Together with seven Directors from the current Board who have chosen to remain on the Board for the next term, they will stand as candidates to be elected at the Meeting of Members to be held on October 6th during the 11th IOS Conference in Oaxaca, Mexico. You can learn more about the four new candidates by reading their statements below.

Pages

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

Supporting Institutional Members

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