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Editor's Picks

Single stem bleed
Acute Oak Decline and the Decline Disease Spiral Model: the State of the Game in the UK
Steve Potter reviews decline diseases affecting oaks in the...
Steve Potter | Feb 12, 2025
Oak Origins by Andrew Hipp
Book Review: Oak Origins – From Acorns to Species and the Tree of Life
A review of Andrew Hipp's new book
Steve Potter | Feb 12, 2025
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Oaks Behaving Strangely
Allen Coombes shares observations of unexpected phenology...
Allen Coombes | Jan 14, 2025

Plant Focus

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Hybrid Highlight: Quercus ×ludoviciana Sarg.
Quercus ×ludoviciana is a naturally occurring oak hybrid from southeastern United States, which has flourished and attracted attention in...
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North American Oaks

Hybrid Highlight: Quercus ×jackiana C.K. Schneid.

By Ryan Russell | February 9, 2023
Quercus xjackiana acorns

The hybrid of Q. alba and Q. bicolor

An Updated Infrageneric Classification of the North American Oaks

By Andrew Hipp | June 16, 2021
Phylogenetic tree

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