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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

Oaks in Normandy

IOS member James Harris and host Arnaud Brunel looking at an oak in Chateau de Galleville
(click on images to enlarge)

I’ve just been with the International Dendrology Society in Normandy, France (16-23 September) where we visited Chateau de Galleville. Here Arnaud Brunel has planted about a hundred young oak trees. He bought these from Pépinière de la Preille. They are all from seed and are arranged by continent: Europe, Asia, and the Americas. The spacing between them is about 10 m so should suffice in the future.

These were planted less than a year ago and there are still some more to come. I think we have persuaded Arnaud to join the IOS and in a few years this collection will be well worth a visit. They are all labeled using the Wespelaar system of plastic that becomes engrained with dirt, and so easier to read with time.

Quercus variabilis Quercus nigra
General view of oak plantation at Chateau de Galleville 

Quercus glauca (right) with Q.myrsinifolia, from Jardin Jungle Karlostachys


Other "oak moments" on the tour included comparing Q.glauca with Q.myrsinifolia, both growing in the extraordinary Jardin Jungle Karlostachys. Here Charles Boulanger has planted the rare and exotic in amongst native forest. Well worth threading your way between the trees and discovering previously unheard of genera, not to mention species.

In total contrast to the Jungle, we visited Chateau de Brecy, home of Didier Wirth, where almost every plant is clipped into topiary or parterre. An unusual but effective choice for one column was Q. coccifera.

Clipped Quercus coccifera at Chateau de Brecy


All photos © Harriet Tupper