Ulmus 'Morton Red Tip'

Ulmus 'Morton Red Tip' (selling name Danada Charm) is a hybrid cultivar raised by the Morton Arboretum from an open pollination of Ulmus 'Morton'. The tree has occasionally been reported as a hybrid of Accolade with the Siberian Elm Ulmus pumila,[1] an error probably owing to the commercial propagation of the tree by grafting onto U. pumila rootstocks. Tested in the US National Elm Trial coordinated by Colorado State University, Danada Charm averaged a survival rate of 77.5% after 10 years.[2]

Ulmus 'Morton Red Tip'
GenusUlmus
Hybrid parentageUlmus 'Morton' = Accolade open pollination
Cultivar'Morton Red Tip' = Danada Charm
OriginUS

Description

Danada Charm has a graceful, vase-shaped habit resembling the American Elm Ulmus americana with foliage tinged red on emergence.

Pests and diseases

Although resistant to Dutch elm disease in the US, Danada Charm is very susceptible to the elm leaf beetle Xanthogaleruca luteola,[3][4] Japanese Beetle,[5] and Gypsy moth; it is also moderately preferred by cankerworms.[6][7]

Cultivation

Danada Charm is very cold hardy; in artificial freezing tests at the arboretum[8] the LT50 (temp. at which 50% of tissues die) was found to be −31 °C. However, the tree is notorious for its stem breakage owing to narrow crotch angles and included bark; in trials at the University of Minnesota it had the unhappy distinction of being the worst of 17 cultivars for breakage.[9] The tree is currently being evaluated in the National Elm Trial coordinated by Colorado State University.

Danada Charm is being promoted by the Chicagoland Grows corporation but is not widely available in the United States. Very rare in Europe, it is not known (2016) to have been introduced to Australasia.

Etymology

The name Danada in Danada Charm is a conflation of the given names of Daniel F. and Ada L. Rice, whose eponymous Foundation helped sponsor the elm breeding program at the Morton Arboretum.

Accessions
North America
Europe

Nurseries
North America

References
  1. Greg McPherson; Larry Costello; James Harding; Steve Dreistadt; Mary Louise Flint; Skip Mezger. "National elm trial: Initial report from Northern California" (PDF). Fs.fed.us. Retrieved 29 March 2022.
  2. Griffin, J.; et al. (2017). "Ten-Year Performance of the United States National Elm Trial" (PDF). Arboriculture & Urban Forestry. International Society of Arboriculture, Atlanta, US. 43 (3): 107–120. doi:10.48044/jauf.2017.010.
  3. McPherson, G. et al. (2008). National elm trial: Initial report from Northern California. Western Arborist, Fall 2009, pp 32-36.
  4. "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
  5. Brady, C., Condra, J., & Potter, D. (2008) Resistance of Landscape-suitable Elm (Ulmus spp.) Cultivars to Japanese Beetle, Leaf Miners, and Gall Makers. 2008 Research Report, Nursery & Landscape Program, pp 15, 16. University of Kentucky.
  6. Guries, R. P. & Smalley, E. B., (1986), Proc. Third Nat. Urban Forestry Conf., pp 214–218, 1986, Orlando, Florida.
  7. Santamour, Frank S.; Bentz, Susan E. (May 1995). "Updated Checklist of Elm (Ulmus) Cultivars for use in North America". Journal of Arboriculture. 21 (3): 122–131. Retrieved 20 June 2016.
  8. Shirazi, A. M. & Ware, G. H. (2004). Evaluation of New Elms from China for Cold Hardiness in Northern Latitudes. International Symposium on Asian Plant Diversity & Systematics 2004, Sakura, Japan.
  9. Giblin, C. P. & Gillman, J. H. (2006). Elms for the Twin Cities: A Guide for Selection and Maintenance. University of Minnesota.
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