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Editor's Picks

The oak tree in Skjomendalen © Gerhard Sørensen-Fuglem and Cecilia Piccirilli Bjerkeset
An oak grows north of the Arctic Circle in Norway
Website Editor | Aug 14, 2023
Unusual symptoms linked to phytoplasma infection in Quercus humboldtiii, Colombia © Eric Boa
Symptoms linked to phytoplasma infection found in Quercus...
Website Editor | Aug 06, 2023
Different names are being used for one species.
Website Editor | Jun 20, 2023

Plant Focus

A small but mature Alabama sandstone oak producing acorns © Patrick Thompson
A Critically Endangered dwarf oak 

Quercus pubescens and friends in Sicily, October 18–23, 2020

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Morgan Santini

Published May 2021 in International Oaks No. 32: 135–144


Amongst European quercophiles probably one of the most debated topics is the incredible morphological diversity of Quercus pubescens (downy oak) and whether these different morphotypes should be considered one species or not. The many names that have been created by different authors throughout time and in different countries is proof that this is not an easy question.


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Brullo, S., R. Guarino, and G. Siracusa. 1999. Revisione tassonomica delle querce caducifoglie della Sicilia. Webbia 54(1): 1-72. Giardina, G. 2011. Sicilia piante vegetazione e ambienti naturali. Orto Botanico Università di Palermo.

Marzio, F.M. 2011. Studi sulla distribuzione delle Querce caducifoglie nel Salento. Unpublished doctoral thesis. Università di Pisa.

Mossa, L., G. Bacchetta, and S. Brullo. 1999. Quercus ichnusae (Fagaceae). A new species from Sardinia. Israel Journal of Plant Sciences 47: 199-207.

Pignatti, S. 1982. Flora d'Italia. 1: 113-120. Bologna: Edagricole.

Schicchi, R. and F.M. Raimondo. 2007. Alberi Monumentali delle Madonie. Università Studi Palermo, Ente Parco delle Madonie.