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Hybrid Highlight: Quercus ×bimundorum E.J. Palmer, the ‘Oak of Two Worlds’

By Website Editor | August 4, 2025
Quercus ×bimundorum ‘Crimschmidt’ growing in the Prairie Arboretum, Freeman, South Dakota, USA © Dirk GiseburtQuercus ×bimundorum ‘Crimschmidt’ growing in the Prairie Arboretum, Freeman, South Dakota, USA © Dirk Giseburt
A naturally occurring hybrid between Quercus robur and Q. alba.

Species Spotlight: Quercus carduchorum K.Koch

By Website Editor | April 17, 2025
Acorn of Quercus carduchorum

A rare species from the Zagros forests in Iran

Species Spotlight: Quercus kotschyana O.Schwarz

By Jean Stephan | April 5, 2025
Quercus kotschyana fruit and leaves in Jaj cedars nature reserve
A rare oak endemic to Lebanon.

Species Spotlight: Quercus persica Jaub. & Spach

By Website Editor | February 10, 2025
Quercus persica acorns

Parisa Panahi and Mehdi Pourhashemi train the follow spot on a rare Iranian oak

Species Spotlight: Quercus magnosquamata Djav.-Khoie

By Website Editor | December 10, 2024
Quercus magnosquamata acorn

A  little-known species from the northern Zagros forests of Iran

Species Spotlight: Quercus dumosa Nutt.

By Joseph Ree | August 8, 2024
Quercus dumosa acorn

Animals, plants, and fungi depend on this humble tree, but its future—and theirs—is all but certain.

Species Spotlight: Quercus peninsularis Trel.

By Roderick Cameron | June 27, 2024
Quercus peninsularis

A Red Oak (Section Lobatae) endemic to inland ranges of northern Baja California, Mexico

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.

Species Spotlight: Quercus boyntonii

By Website Editor | August 11, 2023
A small but mature Alabama sandstone oak producing acorns © Patrick Thompson

A Critically Endangered dwarf oak 

Pages

Editor's Picks

Group photo at Mereweather Arboretum
Oaks in Oz: Australian Oak Open Days, May 8–13, 2025
Oak collections and much more in Canberra, New South Wales...
Website Editor | Aug 11, 2025
Nay! Its Née, not Neé
A controversial publication proposes to change the...
Roderick Cameron | Aug 05, 2025
Group photo with champion Quercus arkansana in Bokrijk Arboretum
Belgian Oak Open Days: May 29–June 1, 2025
A team of reporters share their take on the event.
Website Editor | Jun 22, 2025

Plant Focus

Quercus ×bimundorum ‘Crimschmidt’ growing in the Prairie Arboretum, Freeman, South Dakota, USA © Dirk GiseburtQuercus ×bimundorum ‘Crimschmidt’ growing in the Prairie Arboretum, Freeman, South Dakota, USA © Dirk Giseburt
Hybrid Highlight: Quercus ×bimundorum E.J. Palmer, the ‘Oak of Two Worlds’
A naturally occurring hybrid between Quercus robur and Q. alba.
Read more

Plant Focus

Hybrid Highlight: Quercus ×bimundorum E.J. Palmer, the ‘Oak of Two Worlds’

By Website Editor | August 4, 2025
Quercus ×bimundorum ‘Crimschmidt’ growing in the Prairie Arboretum, Freeman, South Dakota, USA © Dirk GiseburtQuercus ×bimundorum ‘Crimschmidt’ growing in the Prairie Arboretum, Freeman, South Dakota, USA © Dirk Giseburt
A naturally occurring hybrid between Quercus robur and Q. alba.

Species Spotlight: Quercus carduchorum K.Koch

By Website Editor | April 17, 2025
Acorn of Quercus carduchorum

A rare species from the Zagros forests in Iran

Species Spotlight: Quercus kotschyana O.Schwarz

By Jean Stephan | April 5, 2025
Quercus kotschyana fruit and leaves in Jaj cedars nature reserve
A rare oak endemic to Lebanon.

Species Spotlight: Quercus persica Jaub. & Spach

By Website Editor | February 10, 2025
Quercus persica acorns

Parisa Panahi and Mehdi Pourhashemi train the follow spot on a rare Iranian oak

Species Spotlight: Quercus magnosquamata Djav.-Khoie

By Website Editor | December 10, 2024
Quercus magnosquamata acorn

A  little-known species from the northern Zagros forests of Iran

Species Spotlight: Quercus dumosa Nutt.

By Joseph Ree | August 8, 2024
Quercus dumosa acorn

Animals, plants, and fungi depend on this humble tree, but its future—and theirs—is all but certain.

Species Spotlight: Quercus peninsularis Trel.

By Roderick Cameron | June 27, 2024
Quercus peninsularis

A Red Oak (Section Lobatae) endemic to inland ranges of northern Baja California, Mexico

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.

Species Spotlight: Quercus boyntonii

By Website Editor | August 11, 2023
A small but mature Alabama sandstone oak producing acorns © Patrick Thompson

A Critically Endangered dwarf oak 

Pages

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
 

Standard Institutional Members

Bartlett Tree Experts logo
Catalina Island Conservancy logo
Forrest Keeling Nursery logo
Houston Botanic Garden logo
 
Rice University
San Diego Botanic Garden logo
San Diego Zoo Wildlife Alliance logo
The Huntington
The John Fairey Garden