Ulmus szechuanica: Difference between revisions
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''U. szechuanica'' is now considered rare and endangered in its native China. |
''U. szechuanica'' is now considered rare and endangered in its native China. |
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==Cultivars== |
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None known. |
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==Hybrid cultivars== |
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''U. szechuanica'' is not known to have been hybridized. |
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=====North America===== |
=====North America===== |
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*[[Denver Botanic Gardens]], |
*[[Denver Botanic Gardens]], no details available |
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*[[Holden Arboretum]], |
*[[Holden Arboretum]], acc. nos. 96-179 (unknown provenance), 97-30 wild collected in China. |
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=====Europe===== |
=====Europe===== |
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*[[Sir Harold Hillier Gardens]], [[Brighton & Hove]] City Council, [[NCCPG]] elm collection [http://www.brighton-hove.gov.uk/index.cfm?request=c1108042], |
*[[Sir Harold Hillier Gardens]], [[Brighton & Hove]] City Council, [[NCCPG]] elm collection [http://www.brighton-hove.gov.uk/index.cfm?request=c1108042], |
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==Nurseries== |
==Nurseries== |
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=====North America===== |
=====North America===== |
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*Sunshine Nursery, Clinton, Oklahoma, [http://www.sunshinenursery.com/survey.htm] |
*Sunshine Nursery, Clinton, Oklahoma, [http://www.sunshinenursery.com/survey.htm]. |
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*Arborvillage, Holt, Missouri,[http://www.arborvillagellc.com/AV_Catalog_05-06.pdf.pdf]. |
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=====Europe===== |
=====Europe===== |
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None known |
None known |
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==Synonymy== |
==Synonymy== |
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*Sichuan Elm: Morton Arboretum Catalogue 2006 |
*Sichuan Elm: Morton Arboretum Catalogue 2006 |
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* |
*''Ulmus erythrocarpa'' Cheng |
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==References== |
==References== |
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Revision as of 15:53, 14 February 2007
| Ulmus szechuanica | |
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| Ulmus szechuanica leaves, summer | |
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| Species: | U. szechuanica
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| Binomial name | |
| Ulmus szechuanica Fang
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Ulmus szechuanica Fang, or Szechuan Elm is a small to medium deciduous Chinese tree found along the Yangtze river through the provinces of Sichuan, Jiangxi, Anhui, and Jiangsu. It can reach a height of 18 m, but is usually less than 10 m, with a spreading umbrella-like crown. The leaves, distinguished by their emergent red colour, are generally obovate < 9 cm long by 5 cm broad, borne on branchlets with an irregular corky layer. The wind-pollinated petal-less flowers are produced on second-year shoots in February, followed by suborbicular samarae < 16 mm by 13 mm in March.
The tree was evaluated with other Chinese elms at the Morton Arboretum, Illinois, where it was found to grow best on well-drained soils, and exhibited a resistance to Dutch elm disease. However, it was also found to be comparatively weak-wooded, making it susceptible to storm damage in winter.
U. szechuanica is now considered rare and endangered in its native China.
Cultivars
None known.
Hybrid cultivars
U. szechuanica is not known to have been hybridized.
Arboreta etc. specimens
North America
- Denver Botanic Gardens, no details available
- Holden Arboretum, acc. nos. 96-179 (unknown provenance), 97-30 wild collected in China.
Europe
- Sir Harold Hillier Gardens, Brighton & Hove City Council, NCCPG elm collection [1],
Nurseries
North America
Europe
None known
Synonymy
- Sichuan Elm: Morton Arboretum Catalogue 2006
- Ulmus erythrocarpa Cheng
References
- Fu, L. & Jin J. (eds). (1992). China Red Data Book. Rare and endangered plants. Vol. 1. Science Press, Beijing.
- Fu, L., Xin, Y. & Whittemore, A. (2002). Ulmaceae, in Wu, Z. & Raven, P. (eds) Flora of China, Vol. 5 (Ulmaceae through Basellaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA. [4]
- Ware, G. (1995). Little-known elms from China: landscape tree possibilities. Journal of Arboriculture, (Nov. 1995). International Society of Arboriculture, Champaign, Illinois, USA. [5]