Ulmus 'Cathedral'
| Ulmus hybrid | |
|---|---|
 Ulmus 'Cathedral'. | |
| Hybrid parentage | U. pumila × U. davidiana var. japonica |
| Cultivar | 'Cathedral' |
| Origin | WARF, Wisconsin, USA |
Ulmus 'Cathedral' is a hybrid cultivar, one of several derived from crossings of the Siberian Elm U. pumila (female parent) with the Japanese Elm U. davidiana var. japonica at the University of Wisconsin–Madison; it was patented in 1994.
Description
The tree is distinguished from its better-known siblings 'Sapporo Autumn Gold' and 'New Horizon', and 'Rebona' by its large, elliptic leaves, < 14 cm long by < 8 cm broad, almost the same size and shape of those of its male parent, the Japanese Elm, spinach green when mature, turning yellow and orange in autumn. [1]
Pests and diseases
Tests in the USA have found 'Cathedral' to be less resistant to Dutch elm disease than its siblings, although damage is usually confined to the branch tips. Studies in France by the Institut National de la Recherche Agronomique (INRA) confirmed the tree as only 'moderately resistant'.[2] The leaves are also favoured by leaf hoppers and other insects that feed by piercing and sucking.[3]
Cultivation
The tree requires relatively high levels of maintenance owing to its predilection for breaks occasioned by branch inclusions. 'Cathedral' is widely available across the USA, and has also been commercially released in Europe.
Etymology
The tree was named by Mr Donald Willeke of Minneapolis, who observed that where planted in tight rows, a series of gothic cathedral-like arches was ultimately created between the trees.
Accessions
North America
- Brenton Arboretum, Dallas Center, Iowa. 5 trees, acquired 2009. Acc. no. not known.
- Holden Arboretum. Acc. no. 91–202
- Morton Arboretum. Acc. no. 205–2008, 30–2009
Europe
- Grange Farm Arboretum , Sutton St James, Spalding, Lincs., UK. Acc. no. 1058.
Nurseries
North America
- Bailey Nurseries , St Paul, Minnesota
- Johnson's Nursery , Menomonee Falls, Wisconsin
- Lee Nursery Inc. , Fertile, Minnesota
- Linder's Garden Center , St. Paul, Minnesota.
- Sherman Nurseries , Charles City, Iowa
- Sun Valley Garden Centre , Eden Prairie, Minnesota
Europe
- Future Forests , Kealkill, Bantry, County Cork, Ireland.
- Noordplant kwekerijen , Glimmen, Netherlands.
References
- ↑ Santamour, J., Frank, S. & Bentz, S. (1995). Updated checklist of elm (Ulmus) cultivars for use in North America. Journal of Arboriculture 21 (3): 121-131. International Society of Arboriculture, Champaign, Illinois, USA.
- ↑ Pinon, J. 2007). Les ormes résistants à la graphiose (:Elms resistant to Dutch Elm Disease). Forêt-entreprise, No. 175 - Juillet 2007, 37–41, IDF, Paris, France. http://www.foretpriveefrancaise.com/data/info/127219-P.pdf
- ↑ Giblin, C. P. & Gillman, J. H. (2006). Elms for the Twin Cities: A Guide for Selection and Maintenance. University of Minnesota.
External links
- http://www.extension.iastate.edu/Publications/SUL4.pdf Summary, inc. photographs, of elm cultivars resistant to Dutch elm disease available in the USA.