Ulmus parvifolia 'King's Choice'
| Ulmus parvifolia 'King's Choice' | |
|---|---|
 | |
| Species | Ulmus parvifolia |
| Cultivar | 'King's Choice' |
| Origin | Maryland, USA |
The Chinese Elm cultivar Ulmus parvifolia 'King's Choice', patented in 1985, is one of the early American selections best known for its winter hardiness, being able to withstand temperatures of -30 degrees Celsius.[1] It was originally selected for its "outstanding growth (22 feet at 7 years)".[2]
Description
[edit]Bushy in shape,[3] the tree grows to 15 m. tall and 12 m. wide.[4] Its leaves turn from dark green to yellow in autumn,[5] but the cultivar lacks the attractive mottled bark for which the species is renowned.[1][2]
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Bark -
Foliage
Pests and diseases
[edit]The species and its cultivars are highly resistant, but not immune, to Dutch elm disease, and unaffected by the Elm Leaf Beetle Xanthogaleruca luteola.[6]
Cultivation
[edit]The tree featured in the elm trials [1] conducted by Northern Arizona University at Holbrook, eastern Arizona. 'King's Choice' is not known to be in cultivation in Europe or Australasia.
Etymology
[edit]The tree was named for Benjamin J. King, who made the original selection at King's Men Tree Farms, Hampstead, Maryland.
Accessions
[edit]North America
[edit]- Arnold Arboretum, US. Acc. no. 287-95
- Holden Arboretum, US. Acc. no. 92-94
References
[edit]- ^ a b Lindstrom, O. M.; Dirr, M. A. (1991). "Cold hardiness of six cultivars of Chinese elm". HortScience. 26 (3): 290–2. doi:10.21273/HORTSCI.26.3.290. INIST 5458797.
- ^ a b 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.
- ^ Photograph of 'King's Choice' at Arnold Arboretum, 2006; treesandshrubsonline.org
- ^ U. parvifolia 'King's Choice', ulmen-handbuch.de
- ^ U. parvifolia 'King's Choice', plants.beechwood-gardens
- ^ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
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