| Ulmus americana 'Exhibition' | |
|---|---|
| Species | Ulmus americana |
| Cultivar | 'Exhibition' |
| Origin | Patmore Nurseries, Brandon, Manitoba, Canada |
The American elm cultivar Ulmus americana 'Exhibition' is a selection made by the Patmore Nurseries from seeds of a tree at Brandon, Manitoba. Released in 1952, 'Exhibition' was propagated by grafting.
The tree has an upright habit, with a dense, vase-shaped canopy formed from branches bearing numerous small twigs. [1]
No specific information available, but the species as a whole is highly susceptible to Dutch elm disease and elm yellows; it is also moderately preferred for feeding and reproduction by the adult elm leaf beetle Xanthogaleruca luteola , [2] and highly preferred for feeding by the Japanese beetle Popillia japonica [3] [4] in the United States. U. americana is also the most susceptible of all the elms to verticillium wilt. [5]
The tree's status in North America is not known. 'Exhibition' is no longer in commerce.