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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....

Latest Articles

Quercus ×morehus was initially called Abram’s oak by the author Albert Kellogg in his original 1863 description and was thought to be a unique species at the time (although his description was based...
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The 9th International Oak Society Conference held at UC Davis last October was probably the most ambitious IOS Conference to date—and it was a memorable success.
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As is tradition every Triennial Conference, IOS Service Awards were presented at the 2018 Conference Gala Dinner, held on this occasion at the Sacramento Library Galleria. 

Latest Blog Posts

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In 2018, the oaks (newly planted in March 2017) had a rude awakening by the harsh conditions in 2018. The lesson that I have learned is that once the roots have settled, the oak can withstand adverse...
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Three oak-related news items have been brought to my attention lately...
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This blog entry focuses on the Engelmann oak grove at Los Angeles County Arboretum and Botanic Garden.
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I was invited to participate in a meeting organized by the Oak Union in China in Tancheng, Shandong Province from 5th Nov to 7th November, 2018.
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This blog post focuses on the day and a half we spent in San Luis Obispo County. The tree of that leg of our trip was clearly Quercus agrifolia from the champion Ancestor tree at the Halter Ranch...

Upcoming Events

Oct 06, 2018 to Mar 17, 2019
An exhibition at Royal Botanic Gardens, Kew (UK) that will be of interest to IOS members: Mark Frith's breath-taking portraits highlight the architectural beauty of tree trunks, bark and branches in...
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