Ulmus americana 'Ascendens'

Ulmus americana
Details
Cultivar 'Ascendens'
Origin Seneca Park, Rochester, New York

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

Contents

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

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. Acc. no. 140-61.

References

  1. ^ Green, P. S. (1964). Registration of cultivar names in Ulmus. Arnoldia, Vol. 24. Arnold Arboretum, Harvard University. [1]
  2. ^ Miller, F. and Ware, G. (2001). Resistance of Temperate Chinese Elms (Ulmuss spp.) to Feeding of the Adult Elm Leaf Beetle (Coleoptera: Chrysomelidae). Journal of Economic Entomology 94 (1): 162-166. 2001. Entom. Soc.of America.
  3. ^ Miller, F., Ware, G. and Jackson, J. (2001). Preference of Temperate Chinese Elms (Ulmuss spp.) for the Feeding of the Japanese Beetle (Coleoptera: Scarabaeidae). Journal of Economic Entomology 94 (2). pp 445-448. 2001. Entom. Soc.of America.
  4. ^ Pegg, G. F. & Brady, B. L. (2002). Verticillium Wilts. CABI Publishing. ISBN 0851995292