''Ulmus'' 'Morton Plainsman' (selling name ) is a hybrid cultivar raised by the Morton Arboretum from a crossing of Siberian Elm (female parent) and a Japanese Elm grown from openly pollinated seed donated by the Agriculture Canada Research Station at Morden, Manitoba. Tested in the US National Elm Trial coordinated by

Colorado State University Colorado State University (Colorado State or CSU) is a public land-grant research university in Fort Collins, Colorado. It is the flagship university of the Colorado State University System. Colorado State University is classified among "R1: ...

averaged a survival rate of 78% after 10 years.

Description

has modest upright growth, increasing in height by an average of 0.8 m in an assessment at U C Davis,McPherson, G. ''et al''. (2008). National elm trial: Initial report from Northern California. ''Western Arborist'', Fall 2009, 32–36. with leaves much the same size and colour of the American Elm

However, its performance in the southern United States has not impressed, and it was dismissed, along with its Morton stablemates and , as "ugly" by

Michael Dirr Michael A. Dirr, Ph.D is a horticulturist and a professor of horticulture at the University of Georgia. He is an expert on woody plants. Education and experience Dirr earned a Bachelors in Science degree in Plant Physiology and a Masters in Science ...

, Professor of Horticulture at the University of Georgiabr>
on account of its "wild" growth and splaying branches.

Pests and diseases

Although resistant to Dutch elm disease in the US, remains very susceptible to pests such as the elm-leaf beetle '' Xanthogaleruca luteola'' , Japanese beetle,Brady, C., Condra, J., & Potter, D. (2008) Resistance of Landscape-suitable Elm (Ulmus spp.) Cultivars to Japanese Beetle, Leaf Miners, and Gall Makers. ''2008 Research Report, Nursery & Landscape Program'', 15–16. University of Kentucky. and cankerworms.

Cultivation

In trials at the University of Minnesota, was found to have the second highest (after ) incidence of branch breakage occasioned by bark inclusions.Giblin, C. P. & Gillman, J. H. (2006). ''Elms for the Twin Cities: A Guide for Selection and Maintenance.'' University of Minnesota. However, the tree has a high degree of drought and cold tolerance making it particularly suitable for afforestation in the

Great Plains The Great Plains (french: Grandes Plaines), sometimes simply "the Plains", is a broad expanse of flatland in North America. It is located west of the Mississippi River and east of the Rocky Mountains, much of it covered in prairie, steppe, an ...

.Ware, G. (1992). ''Morton. Arb. Quarterly'' 28(1): 1–5, 1992. In artificial freezing tests at the Morton ArboretumShirazi, A. M. & Ware, G. H. (2004). ''Evaluation of New Elms from China for Cold Hardiness in Northern Latitudes''. International Symposium on Asian Plant Diversity & Systematics 2004,

Sakura A cherry blossom, also known as Japanese cherry or sakura, is a flower of many trees of Prunus, genus ''Prunus'' or Prunus subg. Cerasus, ''Prunus'' subg. ''Cerasus''. They are common species in East Asia, including China, Korea and especia ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. the LT50 (temp. at which 50% of tissues die) was found to be −40° C. The tree is currently being evaluated in the

National Elm Trial The National Elm Trial was an American volunteer effort to evaluate a range of newly developed elm cultivars as replacements for elms destroyed by Dutch elm disease. The Colorado State University College of Agricultural Sciences coordinated the tri ...

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coordinated by

. It is not known to have been introduced to Australasia.

Hybrid cultivars

was crossed with the hybrid cultivar ; a selection from the resultant seedlings was marketed under the name 'Charisma', later changed to 'Morton Glossy' = .

Accessions

;North America *Bartlett Tree Experts, US. Acc. nos. 2001–106, 2001-108 *

Brenton Arboretum The Brenton Arboretum is a 141-acre arboretum and public garden in Dallas Center, Iowa, United States, established in 1997. The arboretum displays 175 native Iowa trees and shrubs suitable to the site, as well as many other tree species which can ...

, US. 5 trees, acquired 2009. Acc. no. not known. * Chicago Botanic Garden, US. 2 trees, no other details available. *

Dawes Arboretum The Dawes Arboretum is a nonprofit arboretum located in Newark, Ohio. It includes nearly of plant collections, gardens and natural areas. The site includes approximately 12 miles (19 km) of hiking trails and roadways for a four-mile (6&nbs ...

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US. 3 trees, no acc. details available. * Holden Arboretum, US. Acc. no. 00–127 * Morton Arboretum, US. Acc. nos. 273–97, 4–2004, 156–2005.Photographs of Morton Arboretum elm, Acc. no. 273-97; cirrusimage.com
/ref> *

Smith College Smith College is a Private university, private Liberal arts colleges in the United States, liberal arts Women's colleges in the United States, women's college in Northampton, Massachusetts. It was chartered in 1871 by Sophia Smith (Smith College ...

, US. Acc. no. 36505 * University of Idaho Arboretum, US. Two trees. Acc. no. 2000093 ;Europe * Grange Farm Arboretum, Lincolnshire, UK. Acc. no. 1139.

Nurseries

;North America *Acorn Farm

Galena, Ohio Galena is a village in Delaware County, Ohio, United States. The population was 924 at the 2020 United States Census. History Galena was originally called Zoar, and under the latter name was platted in 1816. A post office called Galena has be ...

, US. *Bailey Nurserie

St. Paul, Minnesota, St. Paul, Minnesota, US. *J. Frank Schmidt & So

Boring, Oregon, Boring, Oregon, US. *Johnson's Nurser

Menomonee Falls Menomonee Falls is a village in Waukesha County, Wisconsin, United States, and is part of the Greater Milwaukee area. The population was 35,626 at the 2010 census, making it the most populous village in Wisconsin. It is the fourth largest communi ...

, Wisconsin, US. *Sun Valley Garden Centr

Eden Prairie, Minnesota, US.

References

External links

*http://fletcher.ces.state.nc.us/programs/nursery/metria/metria11/warren/elm.htm Warren, K., J. Frank Schmidt & Son Co. (2002). ''The Status of Elms in the Nursery Industry in 2000''. *http://www.mortonarb.org/plantinfo/plantclinic/phc/New-Elms-For-The-Landscape.pdf. Miller, F. (2002). ''New elms for the landscape and urban forest''. {{DEFAULTSORT:Ulmus 'Morton Plainsman' Vanguard Hybrid elm cultivar Ulmus articles missing images Ulmus