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Species Spotlight: Quercus costaricensis Liebm.

By Francisco Garin... | November 25, 2021
Quercus costaricensis leaves

Quercus costaricensis is a Central American oak belonging to the subgenus Quercus, section Lobatae.

Vegetative Propagation of Oaks in Iturraran

By Website Editor | March 8, 2015
quercus_delgadoana_-_copy.jpg

Seeking alternatives for adding rare oaks to collections.

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Group photo at Tregrehan
UK Oak Open Days 2025: Caerhays and Tregrehan
Visits to two gardens with collections of oaks and other...
Stephen Wood | Oct 27, 2025
Special Service Award plaque
IOS Service Awards Presented at the 11th IOS Conference
Plaques presented during the Gala Dinner in Oaxaca
Roderick Cameron | Oct 26, 2025
Group photo at Oaxaca Conference
The 11th IOS Oak Conference in Oaxaca
140 participants from 20 countries attended the Triennial...
Nikola Šušić | Oct 25, 2025

Plant Focus

Quercus vulcanica acorn and leaves
Species Spotlight: Quercus vulcanica Boiss. & Heldr. ex Kotschy
An oak endemic to Turkey
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Iturraran

Species Spotlight: Quercus costaricensis Liebm.

By Francisco Garin... | November 25, 2021
Quercus costaricensis leaves

Quercus costaricensis is a Central American oak belonging to the subgenus Quercus, section Lobatae.

Vegetative Propagation of Oaks in Iturraran

By Website Editor | March 8, 2015
quercus_delgadoana_-_copy.jpg

Seeking alternatives for adding rare oaks to collections.

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

Supporting Institutional Members

Denver BG Logo
The Morton Arboretum logo
San Antonio Botanical Garden logo
 

Standard Institutional Members

Bartlett Tree Experts logo
Catalina Island Conservancy logo
Forrest Keeling Nursery logo
Houston Botanic Garden logo
 
Rice University
San Diego Botanic Garden logo
San Diego Zoo Wildlife Alliance logo
The Huntington
The John Fairey Garden