Ulmus americana 'Columnaris'


Ulmus americana 'Columnaris'
Ulmus americana
Details
Cultivar 'Columnaris'
Origin Conesus Lake, New York, USA

The American Elm Ulmus americana 'Columnaris' has a columnar form [2], and was propagated from a tree found by Mr John Dunbar at Conesus Lake, New York, before 1920 [1]. The tree should not be confused with U. americana var. columnaris Rehder, J. Arnold Arbor. 3: 42, 1922.

Contents

Description

Not available.

Pests and diseases

No specific information available, but the species 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] [3], and highly preferred for feeding by the Japanese Beetle Popillia japonica [3] [4] [5] in the USA. U. americana is also the most susceptible of all the elms to verticillium wilt [4].

Cultivation

'Columnaris' is not known to have been cultivated beyond the USA, and is no longer in commerce.

Accessions

North America
  • Morton Arboretum. Specimen in the Columnar Tree Section reputed to be "in good health" in the autumn of 2006. Acc. no. 1041-41, (graft).

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

External links