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Harriet Tupper tells about oaks in collections seen in Normandy on an IDS tour.  
Posted Sun, 2017-10-01 12:10 in Harriet Tupper's blog
Here are two photos of acorns collected at Hackfalls end of April and now germinating.
Posted Mon, 2016-06-27 16:18 in Harriet Tupper's blog
I went out to New Zealand to join the local members of the International Dendrology Society holding their AGM and combining this with the 100th birthday of Bob Berry
Posted Tue, 2016-06-07 22:59 in Harriet Tupper's blog
Last week I went to an Art and Antiques Fair and found the scuplture ilustrated here.
Posted Mon, 2015-03-23 15:51 in Harriet Tupper's blog
IOS-member Harriet Tupper visited Plaček Quercetum in Czech Republic. 
Posted Thu, 2014-08-14 21:09 in Harriet Tupper's blog

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

h_tupper@hotmail.com's blog

Harriet Tupper tells about oaks in collections seen in Normandy on an IDS tour.  
Posted Sun, 2017-10-01 12:10 in Harriet Tupper's blog
Here are two photos of acorns collected at Hackfalls end of April and now germinating.
Posted Mon, 2016-06-27 16:18 in Harriet Tupper's blog
I went out to New Zealand to join the local members of the International Dendrology Society holding their AGM and combining this with the 100th birthday of Bob Berry
Posted Tue, 2016-06-07 22:59 in Harriet Tupper's blog
Last week I went to an Art and Antiques Fair and found the scuplture ilustrated here.
Posted Mon, 2015-03-23 15:51 in Harriet Tupper's blog
IOS-member Harriet Tupper visited Plaček Quercetum in Czech Republic. 
Posted Thu, 2014-08-14 21:09 in Harriet Tupper's blog

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