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Editor's Picks

Michael Eason hiking in Anza-Borrego Desert State Park to observe Washingtonia filifera in situ
Currently at San Antonio Botanic Garden, Michael's work has...
Amy Byrne | Feb 15, 2023
An exhibition that beautifully depicts and locates oaks
Roderick Cameron | Feb 09, 2023
Burke Oak Collection at New York Botanical Garden
The Coleman and Susan Burke Oak Collection at The New York...
Todd Forrest | Feb 08, 2023

Plant Focus

Quercus xjackiana acorns
The hybrid of Q. alba and Q. bicolor

Roderick Cameron's blog

Quercus Day in Argentina


On April 25 Grigadale Arboretum in Argentina received a small group of visitors for its first Oak Day. Participants came from near and far (from Buenos Aires at 500 km, and even from Salta in the north of Argentina, almost 2,000 km away) and included IOS members Peter Laharrague and Marilyn Mulville, members of the International Dendrology Society, a researcher from a leading botanic garden, and other oak enthusiasts—or soon to be enthusiasts.

Exciting news for quercophiles: a new book about Mexican oaks will be published in June. It will be in Spanish, but extensively illustrated. It is available for pre-order with an attractive discount on cover price. Below is an image of the sales brochure, with a translation of the text.

Oaks and Herbicide

What happens to oaks after a mild dose of agricultural grade herbicide?

Flood-resistant Oaks?

After losing young oaks to flooding, I am on the look out for species that might not mind having their feet in water for a while.

Quercus rotundifolia var. macrocarpa

Some large acorns from Portugal lead to interesting correspondence with Iberian oak expert Francisco Vázquez.

The Oak at La Porteña al Sur

I recently had the opportunity of seeing one of the largest pedunculate oaks (Quercus robur) in South America. It stands at the edge of the large lawn in front of the homestead at La Porteña al Sur, once part of a vast estancia (estate) with a rich history stretching back to arrival of the Spaniards in the region of what is now Buenos Aires. The tree is remarkable for the size it has attained in a relatively short time, but also for its habit.

Update on the Quercus suber at Parque Anchorena (and Others)

The Anchorena Alcornoque revisited and a stand of century-old cork oaks in Montevideo, Uruguay.

IOS-member Teodoro Marañón has sent me links to a special issue of the Spanish journal "Ecosistemas" (Ecosystems) that he has co-edited.

Oaks on Ardnamurchan Peninsula, Scotland

Quercus on Ardnamurchan Peninsula, the most westerly point of mainland Britain.

Update on the Oak of Kvill

Maarten Windemuller has sent me some more photos of the Rumskulla Oak, including a couple from 1926 that give a good idea of the oak's decline in its latter years.They were published in the 1926-1927 yearbook of the Nature Conservation Society in Skåne (Naturskyddsföreningen i Skåne).