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Editor's Picks

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Dr. Michael Avishai, a leading oak expert, botanist, and...
Ori Fragman-Sapir | Feb 08, 2019
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The Huntington, in San Marino, CA, obtained a grant from...
Website Editor | Feb 08, 2019
It may surprise you to learn that we are not the first Oak...
Shaun Haddock | Dec 15, 2018

Plant Focus

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Quercus douglasii is an endemic California oak tree, affectionately called “the blue oak” due to its distinctive blueish-green leaf color....

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Copenhagen Hills Preserve is an ecological gem.  With its unique calcium-rich soils, it hosts a plethora of plant communities, ranging from...
Ever since the genus Quercus grabbed my attention, I have been amazed by the ability of oaks to hybridize easily (sometimes too easily),...
We are currently requesting accessions data, including provenance information, from all gardens that maintain oak species. 
In the center of Oley Valley in Pennsylvania stands a majestic old chinkapin oak (Quercus muehlenburgii) known to many residents of the...
In January 2011, I made a quick visit to several natural areas in Palm Beach County, Florida while on a business trip and had my first...
This book is a thorough account of the 150-year tradition of Hillier’s and treats readers to the people, the places, and the plants that...
In collaboration with BGCI and the IUCN/SSC Global Tree Specialist Group, The Morton Arboretum has launched a project to complete threat...
The Pholoe oak forest is located in southwestern Greece, in a plateau area at an altitude of about 600 m. It is an ecosystem that is unique...
A previously unreported station for Quercus sinuata var. breviloba has recently been identified in southwestern Custer County, Oklahoma. 
A restoration project that will be of interest to IOS members is taking place in the Australian state of Victoria. A plantation of Valonia...
This trip report from Béatrice Chassé through Northern Mexico is reproduced from the IOS Journal.  The companion photo gallery contains...
In January, 2015, The Morton Arboretum launched a project in collaboration with BGCI and the IUCN/SSC Global Tree Specialist Group, which...

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