Ulmus'Morton Glossy'
| Ulmus'Morton Glossy' | |
|---|---|
 Triumphaged 15 years, Boarhunt, UK | |
| Genus | Ulmus |
| Hybrid parentage | 'Morton' =Accolade×'Morton Plainsman' =Vanguard |
| Cultivar | 'Morton Glossy' =Triumph |
| Origin | US |
Ulmus'Morton Glossy'(selling nameTriumph) is ahybridcultivarraised by theMorton 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:AccoladeandVanguard.Tested in the USNational Elm Trialcoordinated byColorado State University,[1]Triumphaveraged a survival rate of 86% after 10 years.[1]Triumphwas introduced to the UK in 2006 by the Frank P. Matthews nursery in Worcestershire.[2]
Description
[edit]Triumphhas been promoted in the United States as "strong and symmetrical" in growth and habit[2]Archived2006-11-14 at theWayback Machine.However, its performance in the southern United States has not impressed, and it was dismissed as "ugly" byMichael Dirr,Professor of Horticulture at theUniversity of Georgia[3],on account of its "wild" growth and splaying branches. It is similar in stature to theAmerican Elmand 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,Triumphwas 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.[2]
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Foliage in midsummer -
Samara -
Bark of 15-year-old tree
Pests and diseases
[edit]Triumphhas a resistance toDutch elm disease,but is highly susceptible to attack by elm leaf beetleXanthogaleruca luteola[4][3][5]andJapanese beetle.[4][5]
Cultivation
[edit]In commerce,Triumphis usually propagated by grafting onto anUlmus pumilarootstock. The tree, under its original name of 'Charisma', featured in the elm trials[6]conducted byNorthern Arizona UniversityatHolbrook,easternArizona.Triumphis very cold-hardy; in artificial freezing tests at the arboretum[6]theLT50(temp. at which 50% of tissues die) was found to be −40 °C.
The tree is currently being evaluated in theNational Elm Trial[7]coordinated byColorado State University.Triumphwas briefly in commerce in the UK, where 180 trees were sold in 2006; several specimens were acquired for assessment byButterfly ConservationinHampshire.[2]
Synonymy
[edit]- 'Charisma': initial name accorded until 1995.
Accessions
[edit]- 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 Arboretum[8],US. 3 trees. No acc. details available.
- Morton Arboretum,US. Acc. nos. 135–94,[7]523–99, 212–2004, 497–2004, 630–2004, 1090–2004.
- Parker Arboretum,US. No acc. details.
- University of IdahoArboretum, 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
[edit]- North America
- Acorn Farms[9],Galena,Ohio,US.
- Bailey Nurseries[10],St. Paul,Minnesota,US.
- Carlton Plants, LLC[11],Dayton, Oregon,US.
- Charles J. Fiore[12],Prairie View,Illinois,US.
- J. Frank Schmidt & Son Co.[13],Boring, Oregon,US.
- Johnson's Nursery[14],Menomonee Falls,Wisconsin,US.
- North American Plants[15]Archived2006-11-14 at theWayback Machine,Lafayette,Oregon, US.
- Sester Farms[16],Gresham, Oregon,US.
- Sun Valley Garden Centre[17],Eden Prairie,Minnesota, US.
References
[edit]- ^Griffin, J.; et al. (2017)."Ten-Year Performance of the United States National Elm Trial"(PDF).Arboriculture & Urban Forestry.43(3). International Society of Arboriculture, Atlanta, US: 107–120.doi:10.48044/jauf.2017.010.
- ^abcBrookes, A. H. (2020).Great Fontley Elm Trial, 2020 Report.Butterfly Conservation, Lulworth, UK.
- ^McPherson, G.et al.(2008). National elm trial: Initial report from Northern California.Western Arborist,Fall 2009, 32–36.
- ^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.
- ^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.
- ^Photographs of Morton ArboretumTriumphelm, Acc. no. 135-94; cirrusimage
External links
[edit]- http://fletcher.ces.state.nc.us/programs/nursery/metria/metria11/warren/elm.htmWarren, K., J. Frank Schmidt & Son Co. (2002).The Status of Elms in the Nursery Industry in 2000.
- http:// mortonarb.org/plantinfo/plantclinic/phc/New-Elms-For-The-Landscape.pdf.Miller, F. (2002).New elms for the landscape and urban forest.
- http:// hfrr.k-state.edu/DesktopModules/ViewDocument.aspx?DocumentID=1619Archived2015-02-03 at theWayback MachineDutch Elm Disease.Kansas State University.