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A visit to two Belgian collections on a rainy September day, Arboretum Wespelaar and the National Botanical Garden of Belgium. 
An oak in cultivation as Quercus eugeniifolia has now been described as a new species,  Quercus delgadoana S. Valencia, Nixon & L. M....
The Arboretum des Grandes Bruyères is without doubt one of the most extraordinary private botanic gardens in France.
This trip report from Béatrice Chassé through Northern Mexico is reproduced from the IOS Journal.  The companion photo gallery contains...
A visit to the collections of Daniel Dumont, an Oak Open Day in Belgium.
A previously unreported station for Quercus sinuata var. breviloba has recently been identified in southwestern Custer County, Oklahoma. 
Shaun Haddock invited the IOS membership on July 19, 2010 to an Oak Open Day at the Royal Botanic Gardens, Kew, near London. The aim was to...
The distribution of Palmer's oak (Quercus palmeri Engelm.) includes numerous isolated populations that are presumably relicts of a formerly...
In 2008 one red oak hybrid (Quercus rubra × ellipsoidalis) was diagnosed with oak wilt disease (Ceratocystis fagacearum) at Starhill Forest...
Many common native trees are just as beautiful as cultivated exotics. Since they have evolved with local conditions and are well adapted to...
 
This article covers the 2007 IOS tour to Japan.  It was initially published in the IOS Journal.  

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Editor's Picks

Group photo at Mereweather Arboretum
Oak collections and much more in Canberra, New South Wales...
Website Editor | Aug 11, 2025
A controversial publication proposes to change the...
Roderick Cameron | Aug 05, 2025
Group photo with champion Quercus arkansana in Bokrijk Arboretum
A team of reporters share their take on the event.
Website Editor | Jun 22, 2025

Plant Focus

Quercus ×bimundorum ‘Crimschmidt’ growing in the Prairie Arboretum, Freeman, South Dakota, USA © Dirk GiseburtQuercus ×bimundorum ‘Crimschmidt’ growing in the Prairie Arboretum, Freeman, South Dakota, USA © Dirk Giseburt
A naturally occurring hybrid between Quercus robur and Q. alba.

All Articles

A visit to two Belgian collections on a rainy September day, Arboretum Wespelaar and the National Botanical Garden of Belgium. 
An oak in cultivation as Quercus eugeniifolia has now been described as a new species,  Quercus delgadoana S. Valencia, Nixon & L. M....
The Arboretum des Grandes Bruyères is without doubt one of the most extraordinary private botanic gardens in France.
This trip report from Béatrice Chassé through Northern Mexico is reproduced from the IOS Journal.  The companion photo gallery contains...
A visit to the collections of Daniel Dumont, an Oak Open Day in Belgium.
A previously unreported station for Quercus sinuata var. breviloba has recently been identified in southwestern Custer County, Oklahoma. 
Shaun Haddock invited the IOS membership on July 19, 2010 to an Oak Open Day at the Royal Botanic Gardens, Kew, near London. The aim was to...
The distribution of Palmer's oak (Quercus palmeri Engelm.) includes numerous isolated populations that are presumably relicts of a formerly...
In 2008 one red oak hybrid (Quercus rubra × ellipsoidalis) was diagnosed with oak wilt disease (Ceratocystis fagacearum) at Starhill Forest...
Many common native trees are just as beautiful as cultivated exotics. Since they have evolved with local conditions and are well adapted to...
 
This article covers the 2007 IOS tour to Japan.  It was initially published in the IOS Journal.  

Pages

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