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Editor's Picks

Share your oak story in Oaxaca!
Website Editor | Mar 17, 2025
Single stem bleed
Steve Potter reviews decline diseases affecting oaks in the...
Steve Potter | Feb 12, 2025
Oak Origins by Andrew Hipp
A review of Andrew Hipp's new book
Steve Potter | Feb 12, 2025

Plant Focus

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Quercus ×ludoviciana is a naturally occurring oak hybrid from southeastern United States, which has flourished and attracted attention in...

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