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

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

Quercus rysophylla Puts on a Show Way Down South

By Roderick Cameron | January 31, 2014

Taking trees out of their comfort zone may have surprising results. Here are some photographs of Quercus rysophylla growing in Grigadale Arboretum in Argentina (38° S, 59° W), taken in June 2011 (late autumn). The leaves turned late, and turned a very deep red. From what I have been told, this does not happen in the species' natural habitat. It may be that the color was the result of stress or disease as in the months following we found die-back (you can see the beginnings of it in the first photo) and had to prune severely in an attempt to encourage new growth and save the tree (at the moment it appears to be recovering). Has anyone seen color like this on loquat leaf oak? Post a comment if so!