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By Ryan Russell |
Feb 15, 2018

As Co-Registrar of oak cultivars I think it’s important to periodically remind members about some of the exceptional selections of oaks that are out there in collections and nurseries. In the interest of appealing to a broader group, I thought I would select a cultivar from the Old World and one from the New.

By Website Editor |
Feb 15, 2018

The Botanical Garden of Porto is located on the west side of the city of Porto, on a plateau overlooking the mouth of the Douro River and the Atlantic Ocean. Currently covering 4 hectares, it is part of the grounds of the University of Porto campus and is situated on what was once Quinta do Campo Alegre, a historic estate formerly on the outskirts of Porto. 

By Website Editor |
Feb 14, 2018

Quercus semecarpifolia, commonly known as brown oak, is the main forest-forming evergreen tree species from upper temperate to subalpine regions (2,500–3,300 m) in Western Himalaya.

By Roderick Cameron |
Dec 14, 2017

For this Species Spotlight we train our follow spot on an oak that is quite a star of the quercine scene: Quercus hypoleucoides (stage name: silverleaf oak). 

By Website Editor |
Oct 11, 2017

North American oaks have a northern temperate origin and only later colonized Mexico and Central America, according to a new study. 

By Website Editor |
Oct 11, 2017

Our German speaking members will be interested to learn that a new book on giant oaks in Germany was published in September 2017: Riesige Eichen: Baumpersönlichkeiten und ihre Geschichten (Giant Oaks: Tree personalities and their stories). 

By Website Editor |
Oct 9, 2017
Bernard de la Rochefoucauld with Franklinia alatamaha

Bernard de La Rochefoucauld, long-time IOS member with his wife Brigitte, founder of l’Arboretum des Grandes Bruyères, died July 18, 2017, shortly before his 95th birthday.

By Charles Snyers ... |
Oct 9, 2017

The International Oak Society celebrates its 25th anniversary at Starhill Forest Arboretum.

By Audrey Denvir |
Oct 8, 2017

The Morton Arboretum and the Botanic Garden at the Benemérita Universidad Autónoma de Puebla hosted a Rare Mexican Oak Taxonomy Workshop, which brought together key stakeholders and experts on Mexican oaks to discuss taxonomy and conservation.

By Diana Jerome |
Oct 3, 2017

One-fourth of the United States’ oak species are now considered of conservation concern, according to data compiled by researchers at The Morton Arboretum for the latest update of the International Union for Conservation of Nature (IUCN) Red List of Threatened Species™. Sixteen species of oaks, all in the southern and western U.S., are now classified as Critically Endangered, Endangered, or Vulnerable on the IUCN Red List, with another four species deemed Near Threatened. 

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