Ulmus americana 'Morden'
| Ulmus americana | |
|---|---|
| Cultivar | 'Morden' |
| Origin | Dominion Experimental Farm, Morden, Manitoba, Canada |
The American Elm cultivar Ulmus americana 'Morden' was cloned from a selection made by the Dominion Experimental Farm, Morden, Manitoba, in 1939 on account of its ability to withstand severe ice storms without breakage.
Description
Fast-growing and ultimately large, 'Morden' has been described as "rather coarse".
Pests and diseases
The tree is not known to have a resistance to Dutch elm disease (see Cultivation). Its tolerance of Elm Leaf Beetle Xanthogaleruca luteola, and Elm Yellows is unknown.
Cultivation
The tree was first marketed by the Patmore Nurseries, Brandon, Manitoba, circa 1948.[1] A specimen planted in the Longenecker Horticultural Gardens at the University of Wisconsin–Madison Arboretum [2] in 1956 had died by 1974 "probably from Dutch elm disease"; no others are known to remain in cultivation.
References
- ↑ Green, P. S. (1964). "Registration of cultivar names in Ulmus. Arnoldia" (PDF). Arnold Arboretum, Harvard University.
- ↑ Arboretum News, Vol. 9, No. 1, January 1960. University of Wisconsin