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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 

Hybrid Highlight: Quercus ×jackiana C.K. Schneid.

By Ryan Russell | February 9, 2023
Quercus xjackiana acorns

The hybrid of Q. alba and Q. bicolor

Pages

Editor's Picks

Quercus sp. Ardnamurchan Peninsula
Oaks in Scotland: An Unresolved Question?
Is Q. robur invading Q. petraea populations or is it the...
Steve Potter | Apr 17, 2025
Acorn of Quercus carduchorum
Species Spotlight: Quercus carduchorum K.Koch
A rare species from the Zagros forests in Iran
Website Editor | Apr 17, 2025
Compton Oak in 2023
The Origin, Locations, and Date of Planting of Colonial Williamsburg’s Compton Oak
The landmark oak was found as a naturally occurring hybrid
Ricklin Brown | Apr 05, 2025

Plant Focus

Quercus kotschyana fruit and leaves in Jaj cedars nature reserve
Species Spotlight: Quercus kotschyana O.Schwarz
A rare oak endemic to Lebanon.
Read more

Plant Focus

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 

Hybrid Highlight: Quercus ×jackiana C.K. Schneid.

By Ryan Russell | February 9, 2023
Quercus xjackiana acorns

The hybrid of Q. alba and Q. bicolor

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
San Diego Botanic Garden logo
San Diego Zoo Wildlife Alliance logo
The Huntington
The John Fairey Garden