Ulmus 'Dodoens'
Encyclopedia
The Dutch hybrid cultivar
Ulmus 'Dodoens' was derived from a selfed seedling of a hybrid of the Exeter Elm Ulmus glabra 'Exoniensis'
, and the Himalayan Elm Ulmus wallichiana . The tree was one of several cultivars prepared for release in 1970, but delayed by the outbreak of the new, aggressive strain of Dutch elm disease
.
apex. The UK Champion tree at the Westonbirt Arboretum
planted in 1981 measured 17 m in height, with a trunk 36 cm d.b.h.
21 years later in 2002.
, rated 4 out of 5 .
, the tree is no longer recommended for planting wherever the disease remains prevalent.
'Dodoens' was included in trials http://www.netspace.net.au/~stephenf/Resistant_Elms.html in Canberra
, Australia
started in 1988, but has not thrived in that environment. It is not known to have been commercially released in North America although it was evaluated at the Iowa State University
in the early 1970s where it perished, unable to tolerate the very cold winters. .
.
Cultivar
A cultivar'Cultivar has two meanings as explained under Formal definition. When used in reference to a taxon, the word does not apply to an individual plant but to all those plants sharing the unique characteristics that define the cultivar. is a plant or group of plants selected for desirable...
Ulmus 'Dodoens' was derived from a selfed seedling of a hybrid of the Exeter Elm Ulmus glabra 'Exoniensis'
Ulmus glabra 'Exoniensis'
Ulmus glabra Exoniensis, the Exeter Elm, was discovered near Exeter, England, in 1826, and propagated by the Ford nursery in that city. Its fastigiate shape when young, upward-curving tracery, small samarae and leaves, late leaf-flush and late leaf-fall, taken with its south-west England...
, and the Himalayan Elm Ulmus wallichiana . The tree was one of several cultivars prepared for release in 1970, but delayed by the outbreak of the new, aggressive strain of Dutch elm disease
Dutch 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...
.
Description
A very fast-growing tree with upright branches, the generally ovate leaves are dark-green, glabrescent, < 14 cm in length by 10 cm broad, with a pronounced acuminateLeaf shape
In botany, leaf shape is characterised with the following terms :* Acicular : Slender and pointed, needle-like* Acuminate : Tapering to a long point...
apex. The UK Champion tree at the Westonbirt Arboretum
Westonbirt Arboretum
Westonbirt, The National Arboretum is managed by the Forestry Commission. Westonbirt Arboretum is located near the historic market town of Tetbury in Gloucestershire, England, and is perhaps the most important and widely known arboretum in the United Kingdom.Planted in the heyday of Victorian plant...
planted in 1981 measured 17 m in height, with a trunk 36 cm d.b.h.
Diameter at breast height
Diameter at breast height, or DBH, is a standard method of expressing the diameter of the trunk or bole of a standing tree. DBH is one of the most common dendrometric measurements....
21 years later in 2002.
Pests and diseases
'Dodoens' has moderately good resistance 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...
, rated 4 out of 5 .
Cultivation
Eventually released in 1973, sales in the Netherlands dwindled from a peak of almost 16,000 in 1979 to 600 in 2004 http://www.deboomkwekerij.nl/tsde/resources/attachments/download/true/im/false/id/69628/Iep.pdf. Although still commercially available in EuropeEurope
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...
, the tree is no longer recommended for planting wherever the disease remains prevalent.
'Dodoens' was included in trials http://www.netspace.net.au/~stephenf/Resistant_Elms.html in Canberra
Canberra
Canberra is the capital city of Australia. With a population of over 345,000, it is Australia's largest inland city and the eighth-largest city overall. The city is located at the northern end of the Australian Capital Territory , south-west of Sydney, and north-east of Melbourne...
, Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
started in 1988, but has not thrived in that environment. It is not known to have been commercially released in North America although it was evaluated at the Iowa State University
Iowa State University
Iowa State University of Science and Technology, more commonly known as Iowa State University , is a public land-grant and space-grant research university located in Ames, Iowa, United States. Iowa State has produced astronauts, scientists, and Nobel and Pulitzer Prize winners, along with a host of...
in the early 1970s where it perished, unable to tolerate the very cold winters. .
Etymology
The cultivar is named for the 16th century Flemish physician and botanist Rembert DodoensRembert Dodoens
Rembert Dodoens was a Flemish physician and botanist, also known under his Latinized name Rembertus Dodonaeus.-Biography:...
.
Europe
- Arboretum de La Petite LoiterieArboretum de la Petite LoiterieThe Arboretum de la Petite Loiterie is a young arboretum located in Le Sentier, Monthodon, Indre-et-Loire, Centre, France. It is open a few days per month; an admission fee is charged....
http://lapetiteloiterie.free.fr/html/presentation/especes.html, MonthodonMonthodonMonthodon is a commune in the Indre-et-Loire department in central France....
, FranceFranceThe French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...
. No details available - Brighton & HoveBrighton & HoveBrighton and Hove is a unitary authority area and city on the south coast of England. It is England's most populous seaside resort.In 1997 Brighton and Hove were joined to form the unitary authority of Brighton and Hove, which was granted city status by Queen Elizabeth II as part of the millennium...
City Council, NCCPG Elm Collection http://www.brighton-hove.gov.uk/index.cfm?request=c1108042, 1 large tree at Stanmer Park Arboretum, planted 1982. Many trees planted around the city. - Grange Farm Arboretum, Sutton St. James, SpaldingSpalding, LincolnshireSpalding is a market town with a population of 30,000 on the River Welland in the South Holland district of Lincolnshire, England. Little London is a hamlet directly south of Spalding on the B1172 road....
, Lincs.LincolnshireLincolnshire is a county in the east of England. It borders Norfolk to the south east, Cambridgeshire to the south, Rutland to the south west, Leicestershire and Nottinghamshire to the west, South Yorkshire to the north west, and the East Riding of Yorkshire to the north. It also borders...
, UK. Acc. no. 820. - Royal Botanic Gardens Kew acc. nos. 1980-730, 2000-2071, 2001-839.
- Sir Harold Hillier GardensSir Harold Hillier GardensThe Sir Harold Hillier Gardens is an arboretum comprising 72 hectares accommodating over 42,000 trees and shrubs in about 12,000 taxa, notably a collection of oaks, camellia, magnolia and rhododendron....
, UK acc. nos. 1982:4060, 1993:1249. - Westonbirt ArboretumWestonbirt ArboretumWestonbirt, The National Arboretum is managed by the Forestry Commission. Westonbirt Arboretum is located near the historic market town of Tetbury in Gloucestershire, England, and is perhaps the most important and widely known arboretum in the United Kingdom.Planted in the heyday of Victorian plant...
http://www.forestry.gov.uk/forestry/infd-62qk8w, TetburyTetburyTetbury is a town and civil parish within the Cotswold district of Gloucestershire, England. It lies on the site of an ancient hill fort, on which an Anglo-Saxon monastery was founded, probably by Ine of Wessex, in 681. The population of the parish was 5,250 in the 2001 census.In the Middle Ages,...
, Glos.GloucestershireGloucestershire is a county in South West England. The county comprises part of the Cotswold Hills, part of the flat fertile valley of the River Severn, and the entire Forest of Dean....
, UK, acc. no. 1980/156, UK champion, 17m high, 36 cm d.b.h. in 2002 .