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By Guy Sternberg |
Dec 6, 2009

In 2008 one red oak hybrid (Quercus rubra × ellipsoidalis) was diagnosed with oak wilt disease (Ceratocystis fagacearum) at Starhill Forest Arboretum in Illinois. 

By Béatrice Chassé |
Aug 25, 2008

Many common native trees are just as beautiful as cultivated exotics. Since they have evolved with local conditions and are well adapted to their climate, they often require less maintenance and won't escape to invade a balanced ecosystem.

By Anonymous |
Aug 20, 2008


By Shaun Haddock |
Dec 31, 2007

This article covers the 2007 IOS tour to Japan.  It was initially published in the IOS Journal.  


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