Ulmus americana 'Patmore' explained

Ulmus americana 'Patmore'
Species:	Ulmus americana
Cultivar:	'Patmore'
Origin:	Brandon, Manitoba, Canada

The American Elm cultivar Ulmus americana 'Patmore' was selected and raised by R. H. Patmore from a native tree in Brandon, Manitoba, Canada. It may be synonymous with another cultivar from the same source, known as 'Brandon'.^[1]

Description

'Patmore' (or 'Brandon') differs from most American Elms in possessing a pyramidal, as opposed to vase, form.^[2]

Pests and diseases

No other specific information available, but the species generally is highly susceptible to Dutch elm disease and Elm Yellows; it is also moderately preferred for feeding and reproduction by the adult Elm Leaf Beetle Xanthogaleruca luteola,^[3] and highly preferred for feeding by the Japanese Beetle Popillia japonica ^{[4] [5]} in the United States.U. americana is also the most susceptible of all the elms to verticillium wilt.^{[6] [7]}

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, Canada, http://www.agr.gc.ca/sci/arboretum/index_e.php?section=specimens&page=141ulm&PHPSESSID=28c7cb5641bcf4dd8e6dd948ebd359bb No details available.

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.

Notes and References

1. https://jardin-florilege.eu/fr/encyclopedie/ulmus-americana-patmore Photograph and synonymy of Ulmus americana 'Patmore', Mundi Plantarum, jardin-florilege.eu
2. Santamour . Frank S. . Bentz . Susan E. . May 1995 . Updated Checklist of Elm (Ulmus) Cultivars for use in North America. Journal of Arboriculture . 21 . 3. 122–131 . 20 June 2016.
3. Miller . Fredric . Ware . George . Resistance of Temperate Chinese Elms (Ulmus spp.) to Feeding by the Adult Elm Leaf Beetle (Coleoptera: Chrysomelidae) . Journal of Economic Entomology . Oxford University Press (OUP) . 94 . 1 . 2001-02-01 . 0022-0493 . 10.1603/0022-0493-94.1.162 . 162–166 . 11233108. 42980569 . free .
4. Miller . Fredric . Ware . George . Jackson . Jennifer . Preference of Temperate Chinese Elms (Ulmus spp.) for the Adult Japanese Beetle (Coleoptera: Scarabaeidae) . Journal of Economic Entomology . Oxford University Press (OUP) . 94 . 2 . 2001-04-01 . 0022-0493 . 10.1603/0022-0493-94.2.445 . 445–448 . 11332837. 7520439 . free .
5. Web site: Elm Leaf Beetle Survey. 17 July 2017. https://web.archive.org/web/20110719132152/http://www.sunshinenursery.com/survey.htm. 2011-07-19.
6. Pegg, G. F. & Brady, B. L. (2002). Verticillium Wilts. CABI Publishing.
7. Web site: Elm Leaf Beetle Survey. 17 July 2017. https://web.archive.org/web/20110719132152/http://www.sunshinenursery.com/survey.htm. 2011-07-19.