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The oak depicted on the new coin is a challenge to identify.
New 5p coin - Image: The Royal Mint
Posted Wed, 2024-08-21 12:54 in Steve Potter's blog
A new article investigates patterns of geographic overlap—sympatry—in North American oak species.
Figure from syngameon article
Posted Tue, 2024-08-13 16:14 in Andrew Hipp's blog
Aljos Farjon FLS reports on the biodiversity of High Park, a wild section of Blenheim Park in Oxfordshire, England.
Ancient Oaks and Biodiveresity page 1
Posted Fri, 2024-06-28 15:47 in Website Editor's blog
Santiago Reyna has selected a bushy holm oak with attractive maroon-burgundy leaves.
Burgundy leaves on Q. rotundifolia
Posted Fri, 2024-06-28 13:07 in Roderick Cameron's blog
We all know the best you can do with an acorn (turn it into an oak), but what can we do with a cupule? One answer is: whistle! It is a good skill to learn.
Acorn cap whistler in Extremadura
Posted Wed, 2024-04-17 21:33 in Roderick Cameron's blog
IOS member David Cranwell shared with us a bulletin about his work growing Quercus leucotrichophora in New Zealand.
Posted Tue, 2024-04-16 21:51 in Website Editor's blog
IOS member Christy Powell, Horticulture Manager at San Diego Zoo Wildlife Alliance, shared an inspiring news story.
Posted Mon, 2024-04-15 22:23 in Website Editor's blog
I recently had the opportunity of visiting the US National Champion Quercus robusta.
National Champion Quercus robusta
Posted Mon, 2024-04-15 18:37 in Michael Eason's blog
It was a great pleasure for me to be able to write about my 31 years of involvement with Arboretum Trompenburg in Rotterdam.
Pages from Gert's book
Posted Thu, 2024-02-15 12:55 in Gert Fortgens's blog
Veteran oaks are under threat of being removed
img_20231104_142221_mp.jpg
Posted Sat, 2023-12-23 13:48 in Hugo Ribeiro's blog
A new stamp issued by the United States Post Office in August 2023 depicts an oak, though not in a form that most quercophiles would recognize.
Oak featured on a new US stamp
Posted Sun, 2023-12-10 13:33 in Roderick Cameron's blog
A visit to Białowieża Forest in Poland
photo_3_0.jpg
Posted Mon, 2023-10-23 12:26 in Amit Zoran's blog

Pages

Editor's Picks

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
Website Editor | Feb 17, 2026
Quercus miyagii acorn and dried leaves
A rare oak endemic to the Ryukyu Islands of Japan
Elion Jam | Feb 16, 2026
A moss-covered oak (Quercus orocantabrica) in Mata de Albergaria, Peneda-Gerês National Park, Portugal  © Amit Zoran
Steve Potter reviews a new book that features oaks
Steve Potter | Feb 11, 2026

Plant Focus

Quercus canariensis in Cornwall Park, Epsom, Auckland, New Zealand, the champion specimen in New Zealand, planted in the 1920s, 27.2 m tall with a trunk diameter of 209 cm (G. Collett pers. comm. 2026)  © Gerald Collett
Antonio Lambe shares his views on this threatened oak native to Iberia and North Africa

Blogs

The oak depicted on the new coin is a challenge to identify.
New 5p coin - Image: The Royal Mint
Posted Wed, 2024-08-21 12:54 in Steve Potter's blog
A new article investigates patterns of geographic overlap—sympatry—in North American oak species.
Figure from syngameon article
Posted Tue, 2024-08-13 16:14 in Andrew Hipp's blog
Aljos Farjon FLS reports on the biodiversity of High Park, a wild section of Blenheim Park in Oxfordshire, England.
Ancient Oaks and Biodiveresity page 1
Posted Fri, 2024-06-28 15:47 in Website Editor's blog
Santiago Reyna has selected a bushy holm oak with attractive maroon-burgundy leaves.
Burgundy leaves on Q. rotundifolia
Posted Fri, 2024-06-28 13:07 in Roderick Cameron's blog
We all know the best you can do with an acorn (turn it into an oak), but what can we do with a cupule? One answer is: whistle! It is a good skill to learn.
Acorn cap whistler in Extremadura
Posted Wed, 2024-04-17 21:33 in Roderick Cameron's blog
IOS member David Cranwell shared with us a bulletin about his work growing Quercus leucotrichophora in New Zealand.
Posted Tue, 2024-04-16 21:51 in Website Editor's blog
IOS member Christy Powell, Horticulture Manager at San Diego Zoo Wildlife Alliance, shared an inspiring news story.
Posted Mon, 2024-04-15 22:23 in Website Editor's blog
I recently had the opportunity of visiting the US National Champion Quercus robusta.
National Champion Quercus robusta
Posted Mon, 2024-04-15 18:37 in Michael Eason's blog
It was a great pleasure for me to be able to write about my 31 years of involvement with Arboretum Trompenburg in Rotterdam.
Pages from Gert's book
Posted Thu, 2024-02-15 12:55 in Gert Fortgens's blog
Veteran oaks are under threat of being removed
img_20231104_142221_mp.jpg
Posted Sat, 2023-12-23 13:48 in Hugo Ribeiro's blog
A new stamp issued by the United States Post Office in August 2023 depicts an oak, though not in a form that most quercophiles would recognize.
Oak featured on a new US stamp
Posted Sun, 2023-12-10 13:33 in Roderick Cameron's blog
A visit to Białowieża Forest in Poland
photo_3_0.jpg
Posted Mon, 2023-10-23 12:26 in Amit Zoran's blog

Pages

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

Supporting Institutional Members

 

Standard Institutional Members

Rice University
San Diego Botanic Garden logo
San Diego Zoo Wildlife Alliance logo
South Carolina Botanical Garden

 

The Huntington
The John Fairey Garden