Ulmus 'Rebona'

Ulmus hybrid cultivar
'Rebona', Berlin Heinersdorf-Treskowstrasse
Hybrid parentage	U. davidiana var. japonica × U. pumila
Cultivar	'Rebona'
Origin	USA

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 a Resista elm [1] protected under E U breeders' rights (E U council decision 2100/94).

'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'.

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

'Rebona' has been widely planted in Germany as a street tree [2] [3]. It is widely available in the Netherlands, and to a lesser extent in France and the UK.