Ulmus pumila 'Chinkota' explained

Ulmus pumila 'Chinkota'
Species:	Ulmus pumila
Cultivar:	'Chinkota'
Origin:	US

The Siberian elm cultivar Ulmus pumila 'Chinkota' ^[1] was developed from seed of the cultivar 'Dropmore' by the Horticulture & Forestry Department of South Dakota State University c.1955,^[2] as one of a seed-produced line of extremely cold-hardy and drought-resistant trees for use in the Great Plains.^{[3] [4]}

Description

'Chinkota' is distinguished from 'Dropmore' by its lower branching habit and earlier dormancy.^[5]

Pests and diseases

See under Ulmus pumila. Lime-induced chlorosis is not a problem with this cultivar.^[6]

Cultivation

'Chinkota' was extensively trialled during the 1950s in the northern central states of the US by the USDA's Agricultural Research Service. The tree performed very well, and was recommended not only for windbreak and shelterbelt use, but also as an urban ornamental on the high plains area of Kansas and Nebraska.^[6] The cultivar is not known to be in cultivation beyond North America.

Notes and References

1. http://www.hort.uconn.edu/plants/u/ulmpum/ulmpum1.html Ulmus pumila 'Chinkota'; hort.uconn.edu
2. https://archive.org/details/arnoldiaarno_21/page/40/mode/2up Arnoldia : Bulletin of the Arnold Arboretum, 24 July 1964, Vol 24 Nos 6-8, pp.40-80
3. Santamour, Frank S.; Bentz, Susan E. (May 1995). 'Updated Checklist of Elm (Ulmus) Cultivars for use in North America', Journal of Arboriculture. 21 (3); pp.122–131.
4. Collins, P. E. (1955). Chinkota Elm. South Dakota Farm and Home Research. 7 (1), 14 - 16, 27. South Dakota State University, Brookings, USA.
5. http://www.northern.edu/natsource/TREESA1/Siberi1.htm Siberian elm, northern.edu
6. Dodge, A. F. (1960). Woody ornamental and shelter plants for the North Central Region 1954 - 1959: Five year report on regional plantings of Chinkota Elm (Ulmus pumila L.). USDA - ARS, Iowa State University, Ames, Iowa, USA