Ulmus davidiana var. japonica 'Discovery'
Encyclopedia
The Japanese Elm
Ulmus davidiana var. japonica cultivar 'Discovery' is a cold-resistant selection from Canada
, raised along with 'Freedom' in the 1980s by Dr Wilbert Ronald, of Jeffries Nurseries Ltd. and Rick Durrand of Shade Consulting Services, Portage la Prairie, Manitoba
.
and elm leaf beetle Xanthogaleruca luteola
.
, Canada
, failing completely at five out of six sites. Moreover, the survivors developed a very poor branching pattern requiring pruning to strengthen crotches. 'Discovery' fared better in trials conducted by the University of Minnesota
, which considered it "quite hardy", but the tree was criticized for its comparatively slow growth and need for continued crown thinning when young, the latter factor largely disqualifying it as a street tree . Nonetheless, a number of trees have been established in the Minneapolis Parks system.
The tree is not known to have been introduced to Europe
or Australasia
.
Japanese Elm
Ulmus davidiana var. japonica, the Japanese Elm, is one of the larger and more graceful Asiatic elms, endemic to much of continental north-east Asia and Japan.-Description:...
Ulmus davidiana var. japonica cultivar 'Discovery' is a cold-resistant selection from Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
, raised along with 'Freedom' in the 1980s by Dr Wilbert Ronald, of Jeffries Nurseries Ltd. and Rick Durrand of Shade Consulting Services, Portage la Prairie, Manitoba
Manitoba
Manitoba is a Canadian prairie province with an area of . The province has over 110,000 lakes and has a largely continental climate because of its flat topography. Agriculture, mostly concentrated in the fertile southern and western parts of the province, is vital to the province's economy; other...
.
Description
Unlike other Japanese Elms, the growth habit of 'Discovery' is symmetrical, upright, and vase-shaped. The leaves are obovate to oval, and slightly smaller than is typical of the species, their colour dark green turning yellow in autumn. The tree grows to over 15 m in height, with a spread of much the same dimension.Pests and diseases
The tree is resistant to Dutch elm diseaseDutch elm disease
Dutch elm disease is a disease caused by a member of the sac fungi category, affecting elm trees which is spread by the elm bark beetle. Although believed to be originally native to Asia, the disease has been accidentally introduced into America and Europe, where it has devastated native...
and elm leaf beetle Xanthogaleruca luteola
Xanthogaleruca luteola
Xanthogaleruca luteola, commonly known as the Elm Leaf Beetle, is a serious pest of the elm. Indigenous to Europe, it was accidentally introduced to North America. Both the imagines and larvae feed on the emergent leaves of the elm...
.
Cultivation
'Discovery' performed very poorly in government trials http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/opp4055?opendocument in AlbertaAlberta
Alberta is a province of Canada. It had an estimated population of 3.7 million in 2010 making it the most populous of Canada's three prairie provinces...
, Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
, failing completely at five out of six sites. Moreover, the survivors developed a very poor branching pattern requiring pruning to strengthen crotches. 'Discovery' fared better in trials conducted by the University of Minnesota
University of Minnesota
The University of Minnesota, Twin Cities is a public research university located in Minneapolis and St. Paul, Minnesota, United States. It is the oldest and largest part of the University of Minnesota system and has the fourth-largest main campus student body in the United States, with 52,557...
, which considered it "quite hardy", but the tree was criticized for its comparatively slow growth and need for continued crown thinning when young, the latter factor largely disqualifying it as a street tree . Nonetheless, a number of trees have been established in the Minneapolis Parks system.
The tree is not known to have been introduced to Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
or Australasia
Australasia
Australasia is a region of Oceania comprising Australia, New Zealand, the island of New Guinea, and neighbouring islands in the Pacific Ocean. The term was coined by Charles de Brosses in Histoire des navigations aux terres australes...
.
North America
- Brenton ArboretumBrenton ArboretumThe Brenton Arboretum 121 acres is a new arboretum and botanical garden in early stages of development, located at 2629 Palo Circle, Dallas Center, Iowa, USA. The Arboretum aims to display all Iowa native trees and shrubs suitable to the site, as well as many other tree species which can grow in...
, Dallas Center, IowaIowaIowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...
. No details available. - Smith CollegeSmith CollegeSmith College is a private, independent women's liberal arts college located in Northampton, Massachusetts. It is the largest member of the Seven Sisters...
, acc. no. 4703.
North America
- Bailey Nurseries http://www.baileynurseries.com/, St. Paul, MinnesotaMinnesotaMinnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...
- Jeffries Nurseries http://www.jeffriesnurseries.com/discovery.pdf, Portage la Prairie, ManitobaManitobaManitoba is a Canadian prairie province with an area of . The province has over 110,000 lakes and has a largely continental climate because of its flat topography. Agriculture, mostly concentrated in the fertile southern and western parts of the province, is vital to the province's economy; other...
- Johnson's Nursery http://www.johnsonsnursery.com/, Menomonee Falls, WisconsinWisconsinWisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is...
- Lee Nursery Inc. http://www.leenursery.com/isite/subcat.cfm?CatID=270&CatName=Deciduous%20Trees&start=true, FertileFertile, MinnesotaAs of the census of 2000, there were 893 people, 396 households, and 220 families residing in the city. The population density was 471.9 people per square mile . There were 433 housing units at an average density of 228.8 per square mile...
, MinnesotaMinnesotaMinnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state... - Linder's Garden Center http://www.linders.com/category/plants-products/trees/shade/, St. Paul, MinnesotaMinnesotaMinnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...
- Minnesota Valley Nurseries http://www.minnesotavalley.com/shade_trees.htm#U, ShakopeeShakopee, MinnesotaShakopee is a city southwest of downtown Minneapolis in the U.S. state of Minnesota and is the county seat of Scott County. Located on the south bank bend of the Minnesota River, Shakopee and nearby suburbs comprise the southwest portion of Minneapolis-Saint Paul, the thirteenth largest...
, MinnesotaMinnesotaMinnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state... - Patmore Nursery http://patmorenursery.com, BrandonBrandon, ManitobaBrandon is the second largest city in Manitoba, Canada, and is located in the southwestern area of the province. Brandon is the largest city in the Westman region of Manitoba. The city is located along the Assiniboine River. Spruce Woods Provincial Park and CFB Shilo are a relatively short distance...
, ManitobaManitobaManitoba is a Canadian prairie province with an area of . The province has over 110,000 lakes and has a largely continental climate because of its flat topography. Agriculture, mostly concentrated in the fertile southern and western parts of the province, is vital to the province's economy; other...
. - Robinson Nursery http://robinsonnursery.com Amity, OregonAmity, OregonAmity is a city in Yamhill County, Oregon, United States. As of the 2010 Census, the population was 1,614.-History:The town was established between 1848 and 1849 by Joseph and Ahio S. Watt, two brothers who had immigrated to Oregon over the Oregon Trail. Part of Joseph’s land claim became the...
- Sun Valley Garden Centre http://www.qscaping.com/NetPS-Engine.asp?CCID=20000011&page=results&Keyword=ulmus&Category=&Type=&Spread=Any&SpreadDim=feet&Growth=&Hardiness=7&Height=Any&HeightDim=feet&Canopy=&Application=&Texture=&Wildlife=&Form=&Density=&FlowerColor=&FlowerColorJS=&FoliageColor=&FoliageColorJS=&FallColor=&FallColorJS=&FruitPeriod=&BarkColor=&BarkColorJS=&FlowerPeriod=&Variegation=&VariegationJS=&FruitColor=&FruitColorJS=&Edible=&BarkTexture=&SunShade=&Moisture=&Pollution=&SoilType=&pH=&Submit=Search],Eden Prairie, MinnesotaMinnesotaMinnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...
External links
- http://fletcher.ces.state.nc.us/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.