Ulmus americana 'Patmore'

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'.

Ulmus americana 'Patmore'
SpeciesUlmus americana
Cultivar'Patmore'
OriginBrandon, Manitoba, Canada

Description

'Patmore' (or 'Brandon') differs from most American Elms in possessing a pyramidal, as opposed to vase, form.[1]

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 [2], and highly preferred for feeding by the Japanese Beetle Popillia japonica [3] [4] in the United States. U. americana is also the most susceptible of all the elms to verticillium wilt.[5] [6]

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
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References
  1. 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. Retrieved 20 June 2016.
  2. Miller, Fredric; Ware, George (2001-02-01). "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): 162–166. doi:10.1603/0022-0493-94.1.162. ISSN 0022-0493. PMID 11233108.CS1 maint: ref=harv (link)
  3. Miller, Fredric; Ware, George; Jackson, Jennifer (2001-04-01). "Preference of Temperate Chinese Elms ( Ulmus spp.) for the Adult Japanese Beetle (Coleoptera: Scarabaeidae)". Journal of Economic Entomology. Oxford University Press (OUP). 94 (2): 445–448. doi:10.1603/0022-0493-94.2.445. ISSN 0022-0493. PMID 11332837.
  4. "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
  5. Pegg, G. F. & Brady, B. L. (2002). Verticillium Wilts. CABI Publishing. ISBN 0-85199-529-2
  6. "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
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