Ulmus chenmoui
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 Ulmus chenmoui foliage
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| Ulmus chenmoui W.C.Cheng |
Ulmus chenmoui W. C. Cheng is a small deciduous tree from the provinces of Anhui and Jiangsu in eastern China, where it is found at elevations below 200 m on the Langya Shan and Baohua Shan resp.. Growing to a maximum height of 20 m, its slender trunk rarely exceeds 0.5 m in diameter at breast height [d.b.h.]; the bark exfoliates in irregular flakes. Its wing-less twigs bear comparatively large obovate to oblong leaves up to 18 cm in length [1]. The wind-pollinated petal-less flowers are produced on second-year shoots in March; the samarae are obovate < 25 mm long by 17 mm wide and ripen in April.
The tree is rare in cultivation in the West, but was evaluated by Mittempergher in Italy, who found it to have a low susceptibility to Dutch elm disease and elm leaf beetle. It also featured in elm trials conducted by the Institut Nationale de la Recherche Agronomique (INRA) on gravelly soils in the Bois de Vincennes, Paris, but most specimens were killed by drought.
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[edit] Cultivars
There are no known cultivars of U. chenmoui.
[edit] Hybrid cultivars
U. chenmoui has been hybridized in Italy with the Dutch clone 405 (U. glabra x U. minor) to create clone FL509, reputedly a very beautiful tree. It will not be commercially released until full field trials in Italy and the UK have been completed.
[edit] Arboreta etc accessions
[edit] North America
- Denver Botanic Gardens, no details available.
- Morton Arboretum, acc. nos. 47-95, 51-96, 105-98
[edit] Europe
- Sir Harold Hillier Gardens, UK, acc. no. 1994:0328, 3 specimens planted 1993 in the Crookhill Field. Measured in 2005, all were between 5 m and 7 m tall.
[edit] Nurseries
[edit] North America
[edit] Europe
None known
[edit] Synonymy
None
[edit] 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]
