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Editor's Picks

Karl Georg Theodor Kotschy was an Austrian botanist and...
Eike Jablonski | Jun 11, 2016
Quercus grisea - Greenlee County, AZ
This article is an account of the oak field trip organized...
Charles Snyers | Sep 22, 2017
North American oaks have a northern temperate origin and...
Website Editor | Oct 12, 2017

Plant Focus

Quercus acutissima subsp. kingii
Quercus acutissima Carruth. is a species whose natural distribution covers a vast territory in East and Southeast Asia, from central Nepal...

Roderick Cameron's blog

Coppiced Oak Bushes?

The unexpected consequence of cutting down young oaks in the arboretum.

New Book Featuring Notable Trees: "World Tree Story"

World Tree Story, a new book by Julian Hight, featuring notable trees from around the world, including many oaks, is availlable for advance purchase.

De-forking Quercus dentata

After taking charge of my father's oak collection in 2009, I noticed that several of the trees had forks in the trunks and hence co-dominant stems. Having no knowledge of these matters, I consulted Guy Sternberg, who I had visited in Starhill Arboretum in 2010, seeking guidance. I sent him a photograph of some of the oaks in question, and he replied with suggestions on how to tackle one of the worst cases: a Quercus dentata planted out in 1998. Guy described this tree as having a "Very Bad Fork" and prescribed a course of subordination or suppression of the weak secondary leader.

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 revisted and a stand of century-old cork oaks in Montevideo, Uruguay.


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