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Plant Focus

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

Quercus ×libanerris ‘Tromper’: An Error Disinterred

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Gert Fortgens and Roderick Cameron

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

Introduction

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.

References

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.