Plant Focus

Species Spotlight: Quercus ilicifolia Wangenh.

By Rebecca Dellinger | June 4, 2016

Quercus ilicifolia is a little oak with a big name: bear oak.

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Species Spotlight: Quercus crassifolia Bonpl.

By Roderick Cameron | January 26, 2016

Quercus crassifolia is tree ranging in height from 4 to 15 meters, and is usually easily recognized by its leaves: stiff and leathery, glossy blackish green above, covered with a layer of pale brown hairs beneath, and with bristle-tipped teeth above the widest part of the leaf.

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Species Spotlight: Quercus rotundifolia Lam.

By Website Editor | March 8, 2015

A Mediterranean oak with a long-standing relationship with humanity.

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Species Spotlight: Quercus georgiana M.A. Curtis

By Ryan Russell | November 18, 2014

Georgia oak is known from 15 counties in Georgia and possibly small pockets in Alabama, with an unverified report in North Carolina. One of these locations is Stone Mountain, just northeast of Atlanta, GA

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Species Spotlight: Quercus austrocochinchinensis Hickel & A. Camus

By Website Editor | March 4, 2014

Propagation and reintroduction of an endangered oak: Quercus austrocochinchinensis. An article by Qian-sheng Li and Min Deng, orginally published in Oak News & Notes, Vol. 18. No. 1

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Species Spotlight: Quercus pubescens Willd.

By Thierry Lamant | March 23, 2013

Quercus pubescens Willd. is a species with a wide native range, found across the European continent, from Portugal to Lebanon and from Russia into Southern Germany.

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A new species of oak, Quercus delgadoana

By Website Editor | July 2, 2011

An oak in cultivation as Quercus eugeniifolia has now been described as a new species, Quercus delgadoana S. Valencia, Nixon & L. M. Kelly (Novon June 2011)

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Pleistocene clone of Quercus palmeri Engelm.

By IOS Site Admini... | July 1, 2010

The distribution of Palmer's oak (Quercus palmeri Engelm.) includes numerous isolated populations that are presumably relicts of a formerly larger range that has contracted due to spreading aridity following the end of the Pleistocene.

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Editor's Picks

UK Oak Open Days 2025: Caerhays and Tregrehan

Visits to two gardens with collections of oaks and other...

Stephen Wood | Oct 27, 2025

IOS Service Awards Presented at the 11th IOS Conference

Plaques presented during the Gala Dinner in Oaxaca

Roderick Cameron | Oct 26, 2025

The 11th IOS Oak Conference in Oaxaca

140 participants from 20 countries attended the Triennial...

Nikola Šušić | Oct 25, 2025

Species Spotlight: Quercus vulcanica Boiss. & Heldr. ex Kotschy

An oak endemic to Turkey