The

American Elm ''Ulmus americana'', generally known as the American elm or, less commonly, as the white elm or water elm, is a species of elm native to eastern North America. The trees can live for several hundred years. It is a very hardy species that can ...

cultivar A cultivar is a kind of Horticulture, cultivated plant that people have selected for desired phenotypic trait, traits and which retains those traits when Plant propagation, propagated. Methods used to propagate cultivars include division, root a ...

''Ulmus americana'' 'Markham' was

cloned Cloning is the process of producing individual organisms with identical genomes, either by natural or artificial means. In nature, some organisms produce clones through asexual reproduction; this reproduction of an organism by itself without ...

in Avon,

New York New York most commonly refers to: * New York (state), a state in the northeastern United States * New York City, the most populous city in the United States, located in the state of New York New York may also refer to: Places United Kingdom * ...

before 1950 from "an outstanding tree", now long dead, growing naturally on what had been the Markham estate two miles north of Avon since 1794.

Description

The original tree was of great size, and possessed an extremely weeping branching habit.Peattie, D. C. (1950). ''A Natural History of Trees of Eastern and Central North America'', p. 240. Houghton Mifflin Company (HMCo) Field Guides, Boston, MA. It was partly destroyed by fire in the mid-19th century and by a storm in 1893. In 1913 its hollow trunk had a bole-girth of 45 feet and was estimated to be at least 400 years old. "Still, the veteran elm had not lost its vitality," wrote Katharine Stanley Nicholson in her ''Historic American trees'' (1922). "In the spring of 1920, after bursting into leaf, and then losing every one through an onslaught of canker worms, it rallied bravely and in a few weeks was once more in full foliage."Nicholson, Katharine Stanley, ''Historic American trees'' (NY, 1922); p.42
/ref>

Cultivation

It is not known whether 'Markham' remains in cultivation in

North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...

or beyond.

References

{{Elm species, varieties, hybrids, hybrid cultivars and species cultivars , state=collapsed American elm cultivar Ulmus articles missing images Ulmus