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In Memoriam: Julianne Skai Arbor (1969–2026)

By Website Editor | October 26, 2026
Julianne Skai Arbor

We were shocked to learn that Julianne Skai Arbor, also known as TreeGirl, died in June 2026.

Bartlett Tree Experts Plant Roots in UK with New Research Laboratories and Arboretum

By Editorial Staff | June 17, 2026
Opening ceremony at the R.A.Bartlett Tree Research Laboratories and Arboretum - Image: Bartlett Tree Experts

A new research laboratory and arboretum in Spencers Wood, south of Reading, UK

Taxonomists Huddle at Harvard

By Jeannine Cavend... | April 21, 2026
Group photo at Harvard Herbarium

The Harvard University Herbaria hosted a novel Oak Taxonomy Workshop.

In Memoriam: Michel Duhart (1923–2026)

By Francisco Garin... | April 5, 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

By Website Editor | February 17, 2026
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

By Roderick Cameron | October 26, 2025
Special Service Award plaque

Plaques presented during the Gala Dinner in Oaxaca

The 11th IOS Oak Conference in Oaxaca

By Nikola Šušić | October 25, 2025
Group photo at Oaxaca Conference

140 participants from 20 countries attended the Triennial Conference

Pages

Editor's Picks

Quercus macrolepis
Data Request for Gap Analysis of Western Eurasian and North African Oaks
Website Editor | Oct 26, 2026
Julianne Skai Arbor
In Memoriam: Julianne Skai Arbor (1969–2026)
We were shocked to learn that Julianne Skai Arbor, also...
Website Editor | Oct 26, 2026
Oak decline in Iran
Oak Decline in Zagros Forests: A Review of History, Causes, Extent, and Management Strategies with Emphasis on Field Monitoring Results
Over the past two decades, the Zagros forests have been...
Mehdi Pourhashemi | Oct 10, 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

Society News

In Memoriam: Julianne Skai Arbor (1969–2026)

By Website Editor | October 26, 2026
Julianne Skai Arbor

We were shocked to learn that Julianne Skai Arbor, also known as TreeGirl, died in June 2026.

Bartlett Tree Experts Plant Roots in UK with New Research Laboratories and Arboretum

By Editorial Staff | June 17, 2026
Opening ceremony at the R.A.Bartlett Tree Research Laboratories and Arboretum - Image: Bartlett Tree Experts

A new research laboratory and arboretum in Spencers Wood, south of Reading, UK

Taxonomists Huddle at Harvard

By Jeannine Cavend... | April 21, 2026
Group photo at Harvard Herbarium

The Harvard University Herbaria hosted a novel Oak Taxonomy Workshop.

In Memoriam: Michel Duhart (1923–2026)

By Francisco Garin... | April 5, 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

By Website Editor | February 17, 2026
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

By Roderick Cameron | October 26, 2025
Special Service Award plaque

Plaques presented during the Gala Dinner in Oaxaca

The 11th IOS Oak Conference in Oaxaca

By Nikola Šušić | October 25, 2025
Group photo at Oaxaca Conference

140 participants from 20 countries attended the Triennial Conference

Pages