The
American Elm
''Ulmus americana'', generally known as the American elm or, less commonly, as the white elm or water elm, is a species of elm native to eastern North America, naturally occurring from Nova Scotia west to Alberta and Montana, and south to F ...
cultivar
A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture ...
''Ulmus americana'' 'Patmore' was selected and raised by R. H. Patmore from a native tree in
Brandon
Brandon may refer to:
Names and people
*Brandon (given name), a male given name
*Brandon (surname), a surname with several different origins
Places
Australia
*Brandon, a farm and 19th century homestead in Seaham, New South Wales
*Brandon, Q ...
,
Manitoba
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, capital = Winn ...
, Canada. It may be synonymous with another cultivar from the same source, known as
'Brandon'.
Description
'Patmore' (or 'Brandon') differs from most American Elms in possessing a pyramidal, as opposed to vase, form.
Pests and diseases
No other specific information available, but the species generally is highly susceptible to
Dutch elm disease
Dutch elm disease (DED) is caused by a member of the sac fungi (Ascomycota) affecting elm trees, and is spread by elm bark beetles. Although believed to be originally native to Asia, the disease was accidentally introduced into Americas, America ...
and
Elm Yellows
Elm yellows is a plant disease of elm trees that is spread by leafhoppers or by root grafts."Elm Yellows." Elmcare.Com. 19 Mar. 2008 . Elm yellows, also known as elm phloem necrosis, is very aggressive, with no known cure. Elm yellows occurs in th ...
; it is also moderately preferred for feeding and reproduction by the adult Elm Leaf Beetle ''
Xanthogaleruca luteola
''Xanthogaleruca luteola'', commonly known as the elm-leaf beetle, is a beetle species in the family Chrysomelidae that is native to Europe but invasive in other parts of the world.http://cisr.ucr.edu/elm_leaf_beetle.html - Center for Invasive Sp ...
'',
and highly preferred for feeding by the Japanese Beetle ''
Popillia japonica''
in the United States.
''U. americana'' is also the most susceptible of all the elms to
verticillium wilt
Verticillium wilt is a wilt disease affecting over 350 species of eudicot plants. It is caused by six species of '' Verticillium'' fungi: ''V. dahliae'', ''V. albo-atrum'', ''V. longisporum'', ''V. nubilum'', ''V. theobromae'' and ''V. tricorp ...
.
[Pegg, G. F. & Brady, B. L. (2002). ''Verticillium Wilts''. CABI Publishing. ]
Cultivation
The tree is not known to have been cultivated beyond
North America.
Synonymy
*'Patmore Ascending', as 'grafted elm', Patmore Nursery Sales, Brandon, Cats. 1945 & 1955.
*'Patmore Ascending Elm', Patmore Nursery Sales, Brandon, Cat. 1973.
*'Exhibition Boulevard Elm', as 'grafted elm', Cat. 1958, and as 'grafted ascending elm' (1966).
Accessions
North America
*
Dominion Arboretum
The Dominion Arboretum (french: Arboretum du Dominion) is an arboretum part of the Central Experimental Farm of Agriculture and Agri-Food Canada in Ottawa, Ontario, Canada. Originally begun in 1889, the Arboretum covers about of rolling land ...
, Canada
No details available.
References
External links
*https://web.archive.org/web/20070507020319/http://www.extension.umn.edu/yardandgarden/ygbriefs/p425dutchelm-resistant.html Bevacqua, K. J. ''Dutch elm resistant cultivars''.
{{DEFAULTSORT:Ulmus Americana 'Patmore'
American elm cultivar
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