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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.

Donate to Conserve Oaks!

Nearly 90% of IOS members believe that they have a personal role to play in the future of oak conservation. Now is your chance to act! 

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In response to the overwhelming support of oak research and conservation expressed by our members at the 2018 Triennial Conference in Davis, CA, and in light of the fact that at least 20% of the world’s oak species are threatened with extinction, the IOS launched its Oak Conservation and Research Fund in 2019. 

To guide Fund priorities, we conducted a survey that was answered by over one quarter of IOS members. It revealed that restoring habitat, ex-situ conservation, field survey and population monitoring, education, and population reintroduction/reinforcement were high priority Fund activities. So far the Fund has selected 28 projects for funding, following three rounds of applications in 2020, 2022, and 2024. For more information about the Fund, click here.


Oak Conservation and Research Committee