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The American Elm cultivar Ulmus americana 'L'Assomption' was selected from seedlings grown from X-irradiated seed at the eponymous experimental station in Quebec before 1965.[1][2]
| Ulmus americana 'L'Assomption' | |
|---|---|
| Species | Ulmus americana |
| Cultivar | 'L'Assomption' |
| Origin | L'Assomption Experimental Station, Quebec, Canada |
'L'Assomption' is a very slow-growing tree.
The tree is highly resistant to Dutch elm disease.[1] No other specific information is available, but the species as a whole is highly susceptible to Elm Yellows; it is also moderately preferred for feeding and reproduction by the adult Elm Leaf Beetle Xanthogaleruca luteola,[3] and highly preferred for feeding by the Japanese Beetle Popillia japonica [4][5] in the United States. U. americana is also the most susceptible of all the elms to verticillium wilt.[6][5]
The tree is not known to be in cultivation beyond Canada.
North America
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