Ulmus americana 'Augustine'

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Ulmus americana
Cultivar 'Augustine'
Origin Bloomington, Illinois, USA

The American Elm cultivar Ulmus americana 'Augustine' was originally selected in Bloomington, Illinois, in 1927.[1]

Description[edit]

'Augustine' is a fastigiate, vigorous tree distinguished by its thicker branches and larger, more deeply toothed leaves.[2][3]

Pests and diseases[edit]

'Augustine' has proven particularly susceptible to Dutch elm disease, exhibiting 36% crown dieback in one year after inoculation with the pathogen.[4] The species is also highly susceptible to Elm Yellows and is also moderately preferred for feeding and reproduction by the adult Elm Leaf Beetle Xanthogaleruca luteola [5] [1], and highly preferred for feeding by the Japanese Beetle Popillia japonica [6] [2] [3] in the United States. U. americana is also the most susceptible of all the elms to verticillium wilt.[7]

Cultivation[edit]

The tree is not known to have been cultivated beyond the United States, where it is no longer in commerce.

Synonymy[edit]

  • 'Augustine Ascending': Weston, in Horticulture, II.30: 448, 1952.

Accessions[edit]

North America[edit]

References[edit]

  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. ^ Ulmus americana 'Augustine' photographs in University of Michigan Plant Encyclopaedia, saylorplants.com/pd_bigpic.asp?pid=3214&pic_id=pic16, saylorplants.com/pd_bigpic.asp?pid=1931&pic_id=pic16
  3. ^ Photograph of 'Augustine' elms on the National Mall, Washington DC: 'Elms of the Monumental Core', James L. Sherald, National Park Service (2009), p.36 [www.nps.gov/.../ElmsoftheMonuCore_HistandMgmtPlan_122009.pdf]
  4. ^ Townsend, A. M., Bentz, S. E., and Douglass L. W. (2005). Evaluation of 19 American Elm Clones for Tolerance to Dutch Elm Disease. Journal of Environmental Horticulture, March 2005, Horticultural Research Institute, Washington, D.C.
  5. ^ 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.
  6. ^ 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.
  7. ^ Pegg, G. F. & Brady, B. L. (2002). Verticillium Wilts. CABI Publishing. ISBN 0-85199-529-2