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Cultivar Close-up: Quercus ×bebbiana 'Taco'

By Ryan Russell | August 1, 2016
Quercus xbebbiana Taco

Found in the late 1980s by Guy Sternberg in Springfield, Illinois, this selection was noted early on for its rapid growth rate and strong central leader. 

Cultivar Close-up: Quercus robur 'Timuki'

By Ryan Russell | August 1, 2016
Timuki

This cultivar was selected by Raimond Cinovskis, from the Botanical Garden of the Academy of Sciences, Salapils, Latvia and was introduced by Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Průhonice, Czech Republic.

Hybrid Highlight: Quercus ×heterophylla F. Michx.

By Ryan Russell | August 1, 2016
Quercus-x-heterophylla_6-Andreas Gomolka

Named in honor of one of America’s first botanists, John Bartram, Quercus ×heterophylla is known by many as Bartram’s oak.

Species Spotlight: Quercus ilicifolia Wangenh.

By Rebecca Dellinger | June 4, 2016
leaf_r_43_m.jpg

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

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.

Species Spotlight: Quercus rotundifolia Lam.

By Website Editor | March 8, 2015
qrotundi_var_avellanae.jpg

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

Species Spotlight: Quercus austrocochinchinensis Hickel & A. Camus

By Website Editor | March 4, 2014
fig.205.jpg

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

Pages

Editor's Picks

Past IOS President Allen Coombes, Curator of Scientific Collections at Puebla University Botanic Garden, discusses leaf variability in Quercus ceirpes (still image from the documentary)
"Oaks: the Backbone of Mexico" – New Documentary Film
A new documentary by Maricela Rodríguez Acosta
Website Editor | Feb 17, 2026
Quercus miyagii acorn and dried leaves
In Search of Quercus miyagii: A Field Report from Okinawa
A rare oak endemic to the Ryukyu Islands of Japan
Elion Jam | Feb 16, 2026
A moss-covered oak (Quercus orocantabrica) in Mata de Albergaria, Peneda-Gerês National Park, Portugal © Amit Zoran
Amit Zohran's "Oakollective"
Steve Potter reviews a new book that features oaks
Steve Potter | Feb 11, 2026

Plant Focus

Quercus canariensis in Cornwall Park, Epsom, Auckland, New Zealand, the champion specimen in New Zealand, planted in the 1920s, 27.2 m tall with a trunk diameter of 209 cm (G. Collett pers. comm. 2026) © Gerald Collett
Species Spotlight: Quercus canariensis Willd.
Antonio Lambe shares his views on this threatened oak native to Iberia and North Africa
Read more

Plant Focus

Cultivar Close-up: Quercus ×bebbiana 'Taco'

By Ryan Russell | August 1, 2016
Quercus xbebbiana Taco

Found in the late 1980s by Guy Sternberg in Springfield, Illinois, this selection was noted early on for its rapid growth rate and strong central leader. 

Cultivar Close-up: Quercus robur 'Timuki'

By Ryan Russell | August 1, 2016
Timuki

This cultivar was selected by Raimond Cinovskis, from the Botanical Garden of the Academy of Sciences, Salapils, Latvia and was introduced by Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Průhonice, Czech Republic.

Hybrid Highlight: Quercus ×heterophylla F. Michx.

By Ryan Russell | August 1, 2016
Quercus-x-heterophylla_6-Andreas Gomolka

Named in honor of one of America’s first botanists, John Bartram, Quercus ×heterophylla is known by many as Bartram’s oak.

Species Spotlight: Quercus ilicifolia Wangenh.

By Rebecca Dellinger | June 4, 2016
leaf_r_43_m.jpg

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

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.

Species Spotlight: Quercus rotundifolia Lam.

By Website Editor | March 8, 2015
qrotundi_var_avellanae.jpg

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

Species Spotlight: Quercus austrocochinchinensis Hickel & A. Camus

By Website Editor | March 4, 2014
fig.205.jpg

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

Pages

The International Oak Society acknowledges the generous support of the following institutions:

Supporting Institutional Members

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The Morton Arboretum logo
San Antonio Botanical Garden logo

 

Standard Institutional Members

Bartlett Tree Experts logo
Catalina Island Conservancy logo
Forrest Keeling Nursery logo
Houston Botanic Garden logo
Rice University
San Diego Botanic Garden logo
San Diego Zoo Wildlife Alliance logo
South Carolina Botanical Garden

 

The Huntington
The John Fairey Garden