Ulmus 'Morton Glossy'

''Ulmus'' 'Morton Glossy' (selling name ) is a hybrid cultivar raised by the Morton Arboretum, Illinois. Originally named ' Charisma' until it was realized that name had already been registered for another plant, the tree was derived from a crossing of two other hybrid cultivars grown at the Morton: and . Tested in the US National Elm Trial coordinated by Colorado State University

averaged a survival rate of 86% after 10 years. was introduced to the UK in 2006 by the Frank P. Matthews nursery in Worcestershire.Brookes, A. H. (2020). ''Great Fontley Elm Trial, 2020 Report.'' Butterfly Conservation, Lulworth, UK.

Description

has been promoted in the United States as "strong and symmetrical" in growth and habi

. However, its performance in the southern United States has not impressed, and it was dismissed as "ugly" by Michael Dirr, Professor of Horticulture at the University of Georgiabr>
on account of its "wild" growth and splaying branches. It is similar in stature to the American Elm and has leaves that are a deep glossy green when mature, < 10 cm in length by 5 cm broad, with rough upper surface and finely toothed margins. The samara is comparatively small, < 10 mm long by 8 mm wide, the seed central. In trials in the UK, was found to be the first elm cultivar to flush in spring, and the first to shed its leaves in the fall, usually by early October. The tree grew poorly on thin soils over clay, which became very dry in summer, but excelled on floodplain alluvium subjected to brief periods of inundation in winter.

Image:Triumphleaves2.jpg, Foliage in midsummer
File:TRIUMPH SAMARA.jpg, Samara
File:Ulmus TRIUMPH bark.jpg, Bark of 15-year-old tree

Pests and diseases

has a resistance to Dutch elm disease, but is highly susceptible to attack by elm leaf beetle '' Xanthogaleruca luteola'

McPherson, G. ''et al''. (2008). National elm trial: Initial report from Northern California. ''Western Arborist'', Fall 2009, 32–36.
and Japanese beetle.Giblin, C. P. & Gillman, J. H. (2006). ''Elms for the Twin Cities: A Guide for Selection and Maintenance.'' University of Minnesota.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'', pp 15, 16. University of Kentucky.

Cultivation

In commerce, is usually propagated by grafting onto an '' Ulmus pumila'' rootstock. The tree, under its original name of 'Charisma', featured in the elm trial

conducted by Northern Arizona University at Holbrook, eastern Arizona. is very cold-hardy; in artificial freezing tests at the arboretum Shirazi, 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, Japan. 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

coordinated by Colorado State University. was briefly in commerce in the UK, where 180 trees were sold in 2006; several specimens were acquired for assessment by ''Butterfly Conservation'' in Hampshire.

Synonymy

*'Charisma': initial name accorded until 1995.

Accessions

;North America
*Arnold Arboretum, US. Acc. no. 132–2002
*Bartlett Tree Experts, US. Acc. nos. 2001–104, 2001–105
*Bickelhaupt Arboretum, US. Acc. no. 02–038
* Chicago Botanic Garden, US. Planted in the Parking Lots, no other details available.
*Dawes Arboretumbr>
US. 3 trees. No acc. details available.
* Morton Arboretum, US. Acc. nos. 135–94,Photographs of Morton Arboretum elm, Acc. no. 135-94; cirrusimage.com
/ref> 523–99, 212–2004, 497–2004, 630–2004, 1090–2004.
*Parker Arboretum, US. No acc. details.
* University of Idaho Arboretum, US. Two trees. Acc. no. 2000091
;Europe
* Grange Farm Arboretum, UK. Acc. details not known.
*Sir Harold Hillier Gardens, UK. Acc. no: 2007.0260
* Royal Botanic Garden Edinburgh, UK. Acc. no. 20070379

Nurseries

;North America
*Acorn Farm

Galena, Ohio, Galena, Ohio, US.
*Bailey Nurserie

St. Paul, Minnesota, US.
*Carlton Plants, LL

Dayton, Oregon, US.
*Charles J. Fior

Prairie View, Illinois, Prairie View, Illinois, US.
*J. Frank Schmidt & Son Co

Boring, Oregon, US.
*Johnson's Nurser

Menomonee Falls, Wisconsin, US.
*North American Plant

, Lafayette, Oregon, Lafayette, Oregon, US.
*Sester Farm

Gresham, Oregon, 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''.
*http://www.hfrr.k-state.edu/DesktopModules/ViewDocument.aspx?DocumentID=1619 ''Dutch Elm Disease''. Kansas State University.

{{DEFAULTSORT:Ulmus 'Morton Glossy' Triumph
Hybrid elm cultivar
Ulmus articles with images
Ulmus