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The American Elm cultivar Ulmus americana 'Ascendens' is a relatively old clone.
Contents
Description
The tree has small, fastigiate lateral branches forming a narrow, oval head.
Pests and diseases
The clone's resistance to Dutch Elm Disease is not known, but the species is highly susceptible to the disease and Elm Yellows; it is also moderately preferred for feeding and reproduction by the adult Elm Leaf Beetle Xanthogaleruca luteola [1], and highly preferred for feeding by the Japanese Beetle Popillia japonica [2] [3] in the United States. U. americana is also the most susceptible of all the elms to verticillium wilt.
Cultivation
The tree is not known to have been cultivated beyond the USA.
Etymology
Named in 1927 for a tree grown in Seneca Park, Rochester, New York.
North America
Arnold Arboretum. Acc. no. 140-61.
References
Ulmus americana 'Ascendens' Wikipedia(Text) CC BY-SA