Ulmus 'Rebona' is an American hybrid cultivar raised by the Wisconsin Alumni Research Foundation (WARF) as selection 'W916', derived from a crossing of Japanese Elm clone W43-8 = 'Reseda' with Siberian Elm clone W426 grown from seed collected from a street tree at Yankton, South Dakota. The tree was registered in 1993 by Conrad Appel KG, of Darmstadt (ceased trading 2006) and is a sibling of 'New Horizon' (selection 'W917'). In Europe, 'Rebona' is marketed as a Resista elmResista elms, resista-ulmen.com 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,Ulmus 'Rebona', resista-ulmen.com developing a fastigiate pyramidal shape with ascending branches. The glossy leaves (6 to 9 cm long by 3 to 5 wide) are described by Resista Ulmen as "a little smaller and darker" than those of 'New Horizon'.Heybroek, H. M., Goudzwaard, L, Kaljee, H. (2009). Iep of olm, karakterboom van de Lage Landen (:Elm, a tree with character of the Low Countries). KNNV, Uitgeverij. The petiole is 10 to 15 mm long.Ulmus 'Rebona', ulmen-handbuch.dePhilipp Schönfeld, Ulmus 'Rebona', gartenpraxis.de/aktuelles/news/ulme-rebona; 30 October 2023 The seed is central in the samara.
Pests and diseases 'Rebona' is highly resistant to Dutch elm disease, rated 5 out of 5.
Cultivation 'Rebona' has been widely planted as a street tree in Germany, the Netherlands, and to a lesser extent France and the UK.Brookes, A. H. (2020). Disease-resistant elm cultivars. Butterfly Conservation, Lulworth, England. In the Netherlands lines of 'Rebona' were planted in the Parade in the centre of Den Bosch, North Brabant, in 2022.'Rebona' in Den Bosch, Brabant; noordplant.nl Three stand near the entrance to Fenchurch Street Station, London.Mark Seddon and David Shreeve, Great British Elms (Kew Gardens, 2024), p.193'Rebona', Fenchurch Street Station - Google Maps, July 2022, access date: 12 December, 2025 The tree has never been offered for sale in the United States.
Synonymy 'Rebone'
Accessions Europe Botanischer Garten Marburg, Marburg, Germany. No details available. Grange Farm Arboretum, Lincolnshire, UK. Acc. no. not known. Höxter Botanical Garden, Ostwestfalen-Lippe University of Applied Sciences, Höxter, Germany. Planted 2023'Rebona' bark, fruit and leaves photographs, Höxter Botanical Garden Royal Botanic Gardens, Kew, UK. Acc. no. not known. Sir Harold Hillier Gardens, Romsey, UK. One tree planted Crookhill overflow parking area. Acc. no. 2018.0019
Nurseries Europe Baumschule Grossbötzl Ort, Austria. Björkhaga Plantskola Veberöd, Sweden. Clasen & Co Rellingen, Germany. Eisele GmbH, Darmstadt, Germany. Hillier Nurseries, Ampfield, UK. Boomkwekerij Ebben, Cuijk, Netherlands. Pépinières Rouy-Imbert Monfavet-Avignon, France.
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