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Editor's Picks

Quercus coccifera, 97 cm dbh and 15 m canopy spread
Images and insights from Ezra Barnea’s journey to Cyprus’s...
Ezra Barnea | Jun 13, 2026
Lainey Kirshberger and Ryan Silver, students at Oklahoma State University, participated in the fieldwork and will lead the genetic and epigenetic analysis under the supervision of Dr. Antonio R. Castilla.
Endangered oak Quercus hinckleyi shows strong genetic...
Website Editor | Jun 09, 2026
The current Red List status and modelled outlook for the eight Californian oak species, plus tanoak
New paper should significantly change our approach to...
Steve Potter | Jun 09, 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