Ulmus americana 'New Harmony'
From Wikipedia, the free encyclopedia
| Ulmus americana |
|---|
| Cultivar |
| 'New Harmony' |
| Origin |
| Maryland Agricultural Research Service, USA |
The American Elm Ulmus 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 [1]. The tree is currently being evaluated in the National Elm Trial [1] coordinated by Colorado State University.
'New Harmony' is not known to have been introduced to Europe or Australasia.
Contents |
[edit] Arboreta etc. accessions
- 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] Nurseries
- North America
- Princeton Nurseries [2], Princeton, New Jersey
- Sunshine Nursery [3], Clinton, Oklahoma
- The Botany Shop Garden Center [4], Missouri
[edit] Etymology
The tree is named for the Indiana town renowned for its social innovations in the 19th century.
[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.
