New Harmony (elm cultivar)
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The American Elm (U. americana) cultivar New Harmony was released by the United States National Arboretum in 1995, along with Valley Forge. Raised by the Maryland Agricultural Research Service, it is considered by some to have a more desirable growth form than the Valley Forge elm, as it grows vertically on its own with a minimum of early training. However, although resistant to elm leaf beetle, like most other American Elm cultivars New Harmony is susceptible to elm yellows. The original parent tree (located on a roadside in Ohio) is already over 20 m high, with a slightly greater crown spread. The bole divides into several erect branches about 10 m above the ground terminating in slender, pendulous branchlets.
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[edit] Arboreta etc. accessions
[edit] North America
- Bartlett Tree Experts, acc. nos. 2001-233, 2001-446.
- Brenton Arboretum, Dallas Center, Iowa. No details available.
- Longwood Gardens, acc. nos. 2000-0361, 2002-0412, 2004-0674.
[edit] Europe
None known.
[edit] Nurseries
[edit] Etymology
The tree is named for the Indiana town renowned for its social innovations in the 19th century.
[edit] Synonymy
None.
[edit] References
- Townsend, A. M., Bentz, S. E., and Douglass L. W. (2005). Evaluation of 19 American Elm Clones for Tolerance to Dutch Elm Disease. Journal of Environmental Horticulture, March 2005, Horticultural Research Institute, Washington, D.C.
[edit] External links
- http://www.elmpost.org/2003-08.htm Photograph of New Harmony elms in their original test plot, showing their form of growth.
- http://www.extension.iastate.edu/Publications/SUL4.pdf Summary, including photographs, of elm cultivars resistant to Dutch elm disease available in the USA.
- http://www.sunshinenursery.com/elms.htm Review of current elm selections in the USA.
- http://www.ces.ncsu.edu/fletcher/programs/nursery/metria/metria11/warren/elm.htm Return of the Elm -the status of elms in the nursery industry in 2000. Warren, K., J. Frank Schmidt and Co.
