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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

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Quercus macrolepis
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In Memoriam: Julianne Skai Arbor (1969–2026)
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Oak Decline in Zagros Forests: A Review of History, Causes, Extent, and Management Strategies with Emphasis on Field Monitoring Results
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Plant Focus

Quercus afares, Kew, © James MacEwen
Species Spotlight: Quercus afares Pomel
The only oak species endemic to Africa is rare in cultivation. It shouldn't be.
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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