Ulmus americana 'Iowa State'
- Ulmus americana 'Iowa State'
Infobox Cultivar | name = "Ulmus americana"
cultivar = 'Iowa State'
origin = Iowa State University, USAThe American Elm "Ulmus americana" 'Iowa State' was discovered by Professor Alexander (Sandy) McNabb of Iowa State University as the sole surviving tree in 40 acres of diseased elm at Burlington [Santamour, F. S., & Bentz, S. E. Updated checklist of elm (Ulmus) cultivars for use in North America. "Journal of Arboriculture", 21(3): May, 1995.] . ]Description
The tree is possessed of a fastigiate, thickly-branched habit, but has relatively weak crotches rendering it prone to splitting.
Pests and diseases
'Iowa State' was reported in the "American Horticulturist" News Edition, 63(5):4, 1984, as "a natural selection from southeastern Iowa, highly resistant to Dutch elm disease when inoculated".
Cultivation
Specimens were given to Mr. Donald C. Willeke of Minneapolis, Minnesota, former Chairman of the Minnesota and U. S. Urban Forest Councils, who planted them in that city. Most of these trees still survive; one specimen planted in 1977 attained a height of over 20 m and d.b.h. of 50 cm in 30 years. 'Iowa State' is not known to have been commerially propagated. The tree is not known to have been introduced to Europe or Australasia.
ynonymy
* 'Iowa State University': Anon.
Accessions
None known.
References
Wikimedia Foundation.
2010.
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