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Quercus stenophylloides is a medium-sized evergreen oak (15–18 m tall) restricted to central and northern Taiwan.
A database that pools information on oak trees in collections around the world.
An intercontinental artificial hybrid raised at Arboretum national des Barres.
First described by the Japanese botanist Bunzō Hayata in 1913, Quercus hypophaea is a medium to large evergreen oak restricted to the...
David More shares some of his magnificent illustrations of oaks, part of a work-​​in-progress.
A project aims to recover and restore habitats in Serra de Monchique, Portugal.
Quercus tarokoensis (local name 太鲁阁栎 tai lu ge li, "oak of Taroko") is a fairly unknown oak species, restricted to eastern Taiwan.
Quercus acerifolia (maple-leaf oak) is an endangered species in the wild (IUCN Red List)and a highly sought-after species in cultivation.
There are a growing number of unique hybrid selections that feature Quercus rysophylla as one parent.
Quercus ×ludoviciana is a naturally occurring oak hybrid from southeastern United States, which has flourished and attracted attention in...
On October 17, 2019, 80 participants gathered in McCook, Nebraska for a two-day conference and field trip, titled “Growing Better Trees...

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Editor's Picks

Past IOS President Allen Coombes, Curator of Scientific Collections at Puebla University Botanic Garden, discusses leaf variability in Quercus ceirpes (still image from the documentary)
A new documentary by Maricela Rodríguez Acosta
Website Editor | Feb 17, 2026
Quercus miyagii acorn and dried leaves
A rare oak endemic to the Ryukyu Islands of Japan
Elion Jam | Feb 16, 2026
A moss-covered oak (Quercus orocantabrica) in Mata de Albergaria, Peneda-Gerês National Park, Portugal  © Amit Zoran
Steve Potter reviews a new book that features oaks
Steve Potter | Feb 11, 2026

Plant Focus

Quercus canariensis in Cornwall Park, Epsom, Auckland, New Zealand, the champion specimen in New Zealand, planted in the 1920s, 27.2 m tall with a trunk diameter of 209 cm (G. Collett pers. comm. 2026)  © Gerald Collett
Antonio Lambe shares his views on this threatened oak native to Iberia and North Africa

All Articles

Quercus stenophylloides is a medium-sized evergreen oak (15–18 m tall) restricted to central and northern Taiwan.
A database that pools information on oak trees in collections around the world.
An intercontinental artificial hybrid raised at Arboretum national des Barres.
First described by the Japanese botanist Bunzō Hayata in 1913, Quercus hypophaea is a medium to large evergreen oak restricted to the...
David More shares some of his magnificent illustrations of oaks, part of a work-​​in-progress.
A project aims to recover and restore habitats in Serra de Monchique, Portugal.
Quercus tarokoensis (local name 太鲁阁栎 tai lu ge li, "oak of Taroko") is a fairly unknown oak species, restricted to eastern Taiwan.
Quercus acerifolia (maple-leaf oak) is an endangered species in the wild (IUCN Red List)and a highly sought-after species in cultivation.
There are a growing number of unique hybrid selections that feature Quercus rysophylla as one parent.
Quercus ×ludoviciana is a naturally occurring oak hybrid from southeastern United States, which has flourished and attracted attention in...
On October 17, 2019, 80 participants gathered in McCook, Nebraska for a two-day conference and field trip, titled “Growing Better Trees...

Pages

The International Oak Society acknowledges the generous support of the following institutions:

Supporting Institutional Members

 

Standard Institutional Members

Rice University
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San Diego Zoo Wildlife Alliance logo
South Carolina Botanical Garden

 

The Huntington
The John Fairey Garden