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.[1]
Description
Fast-growing and ultimately large, 'Morden' has been described as "rather coarse".[1]
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.[1]
Cultivation
The tree was first marketed by the Patmore Nurseries, Brandon, Manitoba, circa 1948. 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
- 1 2 3 Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus" (PDF). Arnoldia. Arnold Arboretum, Harvard University. 24 (6–8): 41–80. Retrieved 20 June 2016.
- ↑ Arboretum News, Vol. 9, No. 1, January 1960. University of Wisconsin