Log in

Editor's Picks

Allan Taylor
A long-standing member of the IOS and fomer editor of Oak...
Panayoti Kelaidis | Dec 17, 2022
A new study resolves many nomenclatural problems in the...
Carlos Vila-Viçosa | Dec 09, 2022
The team at SDZWA
Christy Powell of the San Diego Zoo Wildlife Alliance works...
Amy Byrne | Dec 06, 2022

Plant Focus

Quercus macdougallii
A rare oak endemic to the Sierra Juárez in Oaxaca

Quercus ×libanerris ‘Tromper’: An Error Disinterred

PDF icon Full text available for IOS members only. If you are a member, you need to log in.

To create an account click here; if you have already registered, click here to become a member.

Individual articles can be purchased for U$S 10. If you would like to purchase an article, email a request to website@internationaloaksociety.org

Gert Fortgens and Roderick Cameron

Published May 2022 in International Oaks No. 33: 45–50


The original Quercus ×libanerris ‘Trompenburg’ has long been thought to be the specimen growing in the eponymous garden, Trompenburg Tuinen & Arboretum in Rotterdam, the Netherlands. For example, at the Harold Hillier Herbarium, the official herbarium of the International Oak Society, specimen No. 2179 of this cultivar is annotated as “Cultivated Trompenburg, original tree.” However, when revising the story of this cultivar, in connection with Allen Coombes and Roderick Cameron’s update of Quercus in Trees and Shrubs Online, we found that the tree at Trompenburg has a different origin and is morphologically different to the ortet. The original, described in 1959 and documented with herbarium specimens stored at Leiden and Wageningen herbaria, in fact grew at a nursery in the Netherlands.


Arboretum Wespelaar. 2021. Catalogue of woody plants. www.arboretumwespelaar.be. Accessed January 1, 2022. Hedge, I.C. and F. Yaltirik 1994.  The Oaks of Turkey. International Oaks 5: 3-22

Krüssmann, G. 1960. Handbuch Der Laubgehölze. Berlin: Parey.

Hoey  Smith,  J.R.P.  van.  2001.  Arboretum  Trompenburg:  Green  Oasis  in  Rotterdam.  Rotterdam:  Stichting  Bevordering  van Volkskracht.