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.

Read more about Post-Conference Tour: Oaxaca

Pre-Conference Tour: Morelia, Guanajuato, Puebla, and Veracruz

By John Leszczynski | December 10, 2025

Group photo at Xalapa BG

From Morelia to Oaxaca in the lead-up to the Conference

Read more about Pre-Conference Tour: Morelia, Guanajuato, Puebla, and Veracruz

Species Spotlight: Quercus crassipes Bonpl.

By Roderick Cameron | April 22, 2024

Quercus crassipes acorns with inrolled cupule margin

One of the more well-known Mexican oaks in cultivation.

Read more about Species Spotlight: Quercus crassipes Bonpl.

Gene Flow and a Mexican Metacollection in IOS Webinar #2

By Nikola Šušić | December 9, 2023

Slide from Dr. Hipp's presentation

As acorns were falling off the trees throughout the Northern Hemisphere, IOS members gathered virtually for Webinar #2.

Read more about Gene Flow and a Mexican Metacollection in IOS Webinar #2

Jim Conrad's Oak Notes

By Website Editor | June 20, 2023

The IOS recently received an inquiry from Jim Conrad about a strange phenomenon he observed on a twig of a Quercus ×dysophylla in the Eastern Sierra Madre in Mexico, where what appeared to be multiple styles emerged from a bud. It turns out they may be fungal reproductive bodies.

Read more about Jim Conrad's Oak Notes

Mexican Oaks at Armstrong Arboretum

By Website Editor | December 8, 2021

Quercus rysophylla

Notable oaks from south of the border.

Read more about Mexican Oaks at Armstrong Arboretum

John Fairey (1930–2020)

By Adam Black | May 21, 2020

Remembering John Fairey, legendary plantsman and founder of the amazing Peckerwood Garden, who sadly passed away March 17, 2020.

Read more about John Fairey (1930–2020)

Encinos de Mexico - a New Book about Mexican Oaks (in Spanish)

By Roderick Cameron | March 12, 2015

Exciting news for quercophiles: a new book about Mexican oaks will be published in June. It will be in Spanish, but extensively illustrated. It is available for pre-order with an attractive discount on cover price. Below is an image of the sales brochure, with a translation of the text.

Read more about Encinos de Mexico - a New Book about Mexican Oaks (in Spanish)

Editor's Picks

Group photo at Harvard Herbarium

Taxonomists Huddle at Harvard

The Harvard University Herbaria hosted a novel Oak Taxonomy...

Jeannine Cavender-Bares | Apr 21, 2026

Morgan and friends in Argentina

Argentine Oak Collections through Italian Eyes

Visits to three collections of Quercus in Buenos Aires...

Morgan Santini | Apr 05, 2026

Michel Duhart and Paco Garin at Jardín Botánico Wilson, Costa Rica

In Memoriam: Michel Duhart (1923–2026)

On April 1st, the very day he turned 103, a great friend...

Francisco Garin Garcia | Apr 05, 2026

Plant Focus

Quercus orocantabrica

Species Spotlight: Quercus orocantabrica Rivas Mart., Penas, T.E.Díaz & Llamas

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

Read more

Mexican oaks

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.

Read more about Post-Conference Tour: Oaxaca

Pre-Conference Tour: Morelia, Guanajuato, Puebla, and Veracruz

By John Leszczynski | December 10, 2025

Group photo at Xalapa BG

From Morelia to Oaxaca in the lead-up to the Conference

Read more about Pre-Conference Tour: Morelia, Guanajuato, Puebla, and Veracruz

Species Spotlight: Quercus crassipes Bonpl.

By Roderick Cameron | April 22, 2024

Quercus crassipes acorns with inrolled cupule margin

One of the more well-known Mexican oaks in cultivation.

Read more about Species Spotlight: Quercus crassipes Bonpl.

Gene Flow and a Mexican Metacollection in IOS Webinar #2

By Nikola Šušić | December 9, 2023

Slide from Dr. Hipp's presentation

As acorns were falling off the trees throughout the Northern Hemisphere, IOS members gathered virtually for Webinar #2.

Read more about Gene Flow and a Mexican Metacollection in IOS Webinar #2

Jim Conrad's Oak Notes

By Website Editor | June 20, 2023

The IOS recently received an inquiry from Jim Conrad about a strange phenomenon he observed on a twig of a Quercus ×dysophylla in the Eastern Sierra Madre in Mexico, where what appeared to be multiple styles emerged from a bud. It turns out they may be fungal reproductive bodies.

Read more about Jim Conrad's Oak Notes

Mexican Oaks at Armstrong Arboretum

By Website Editor | December 8, 2021

Quercus rysophylla

Notable oaks from south of the border.

Read more about Mexican Oaks at Armstrong Arboretum

John Fairey (1930–2020)

By Adam Black | May 21, 2020

Remembering John Fairey, legendary plantsman and founder of the amazing Peckerwood Garden, who sadly passed away March 17, 2020.

Read more about John Fairey (1930–2020)

Encinos de Mexico - a New Book about Mexican Oaks (in Spanish)

By Roderick Cameron | March 12, 2015

Exciting news for quercophiles: a new book about Mexican oaks will be published in June. It will be in Spanish, but extensively illustrated. It is available for pre-order with an attractive discount on cover price. Below is an image of the sales brochure, with a translation of the text.

Read more about Encinos de Mexico - a New Book about Mexican Oaks (in Spanish)

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

Supporting Institutional Members

Standard Institutional Members

Rice University

South Carolina Botanical Garden

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

Supporting Institutional Members

Standard Institutional Members

Rice University

South Carolina Botanical Garden