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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

Quercus coccifera, 97 cm dbh and 15 m canopy spread
Images and insights from Ezra Barnea’s journey to Cyprus’s...
Ezra Barnea | Jun 13, 2026
Lainey Kirshberger and Ryan Silver, students at Oklahoma State University, participated in the fieldwork and will lead the genetic and epigenetic analysis under the supervision of Dr. Antonio R. Castilla.
Endangered oak Quercus hinckleyi shows strong genetic...
Website Editor | Jun 09, 2026
The current Red List status and modelled outlook for the eight Californian oak species, plus tanoak
New paper should significantly change our approach to...
Steve Potter | Jun 09, 2026

Plant Focus

Quercus orocantabrica
Roderick Cameron and Carlos Vila-Viçosa give an account of this intriguing species from northwestern Iberia with a complex taxonomic and...

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

 San Diego Botanic Garden logoSan Diego Zoo Wildlife Alliance logoSouth Carolina Botanical Garden
 

The Huntington