Ulmus americana 'Ascendens'

The American elm cultivar Ulmus americana 'Ascendens' is a relatively old clone.

Ulmus americana 'Ascendens'
SpeciesUlmus americana
Cultivar'Ascendens'
OriginSeneca Park, Rochester, New York

Description

The tree has small, fastigiate lateral branches forming a narrow, oval head.[1]

Pests and diseases

The clone's resistance to Dutch Elm Disease is not known, but the species is highly susceptible to the 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]

Cultivation

The tree is not known to have been cultivated beyond the USA.

Etymology

Named in 1927 for a tree grown in Seneca Park, Rochester, New York.

Accessions

North America

Arnold Arboretum, US. Acc. no. 140-61.

References
  1. Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. Arnold Arboretum, Harvard University. 24 (6–8): 41–80. Retrieved 16 February 2017.
  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.
  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
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