Cultivar 'Columnaris' | ||
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Origin Conesus Lake, New York, USA People also search for Ulmus minor 'Microphylla Pendula' | ||
The American Elm cultivar Ulmus americana 'Columnaris' was propagated from a tree found by Mr John Dunbar at Conesus Lake, New York, before 1920. The tree should not be confused with U. americana var. columnaris J. Arnold Arbor. 3: 42, 1922.
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Description
As implied by its name, the tree has a fastigiate, columnar form [1].
Pests and diseases
No specific information available, but the species 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.
Cultivation
'Columnaris' is not known to have been cultivated beyond the United States, and is no longer in commerce.