Ulmus 'Rebona'

Ulmus hybrid cultivar
File:Ulmus Rebona (Berlin Heinersdorf - Treskowstrasse) 120606a.jpg 'Rebona', Berlin Heinersdorf-Treskowstrasse
Hybrid parentage	U. pumila × U. davidiana var. japonica
Cultivar	'Rebona'
Origin	USA

Ulmus 'Rebona' is an American hybrid cultivar raised by the Wisconsin Alumni Research Foundation (WARF) as selection '916', derived from a crossing of Siberian Elm U. pumila (female parent) with Japanese Elm U. davidiana var. japonica . The tree was registered in 1993 by Conrad Appel KG, of Darmstadt (ceased trading 2006) and is a sibling of 'New Horizon' (selection '917'). In Europe, 'Rebona' is a 'Resista' elm [2] and therefore protected under E U breeders rights (E U council decision 2100/94).

Description

'Rebona' bears a close resemblance to its sibling 'New Horizon', but requires less maintenance owing to a better leader. The tree grows rapidly, developing a fastigiate pyramidal shape with ascending branches. The glossy clear-green leaves are comparatively small, though slightly larger than those of 'New Horizon'.

Pests and diseases

'Rebona' is highly resistant to Dutch elm disease, rated 5 out of 5.

Cultivation

'Rebona' has been widely planted in Germany as a street tree [3] [4]. It is also now (2014) readily available in the Netherlands, and to a lesser extent in France and the UK.

Accessions

Europe

• Botanischer Garten Marburg [5], Marburg, Germany. No details available.
• Grange Farm Arboretum, Sutton St. James, Spalding, Lincolnshire, UK.
• Wijdemeren City Council, Netherlands, Elm Collection, first planted 2005 De Vijnen, Nederhorst den Berg. Used in elm trials Ankeveen 2009.

Nurseries

Europe

• Baumschule Grossbötzl Ort, Austria
• Björkhaga Plantskola Veberöd, Sweden
• Clasen & Co Rellingen, Germany.
• Eisele GmbH & Co KG Darmstadt, Germany.
• Hilliers Nurseries [6], UK.
• Noordplant [7], Glimmen, Netherlands.
• Pépinières Rouy-Imbert Monfavet-Avignon, France.