Log in

You are here

Editor's Picks

Group photo at Harvard Herbarium
The Harvard University Herbaria hosted a novel Oak Taxonomy...
Jeannine Cavender-Bares | Apr 21, 2026
Morgan and friends in Argentina
Visits to three collections of Quercus in Buenos Aires...
Morgan Santini | Apr 05, 2026
Michel Duhart and Paco Garin at Jardín Botánico Wilson, Costa Rica
On April 1st, the very day he turned 103, a great friend...
Francisco Garin Garcia | Apr 05, 2026

Plant Focus

Quercus orocantabrica
Roderick Cameron and Carlos Vila-Viçosa give an account of this intriguing species from northwestern Iberia with a complex taxonomic and...

An Updated Infrageneric Classification of the North American Oaks

IOS members Paul Manos (Duke University) and Andrew Hipp (The Morton Arboretum) have just published a subsectional classification of North American Red and White Oaks. The paper, open-access in the journal Forests, uses the phylogenetic work that Hipp, Manos, and their many collaborators have published over the past several years to identify nine clades within the White and Red Oaks that warrant recognition at the subsectional level. The paper names formal subsections and provides descriptions and ecological/taxonomic commentary, including implications of ongoing phylogenetic work. You can download the PDF here.

Phylogenetic tree