Ulmus lamellosa
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| Ulmus lamellosa | ||||||||||||||
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 Ulmus lamellosa leaves, Wisley
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| Ulmus lamellosa C.Wang & S.L.Chang |
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Ulmus lamellosa C.Wang & S.L.Chang, the Hebei Elm, is a small deciduous elm restricted to mountain ravines in four provinces to the west and south of Beijing [1]. Rarely more than 10 m in height, it has upright branches forming a rounded crown supported by a slender trunk < 20 cm d.b.h. Considered closely related to the Large-fruited Elm U. macrocarpa, it is distinguishable from that species by its mottled, flaking bark and smaller, obovate, bluntly toothed leaves, which turn a rich gold in autumn.
The wind-pollinated petal-less flowers are produced on second-year shoots in March - April; the large, almost orbicular 35 mm diameter samarae appear from April to May.
Rare in cultivation beyond China, it is one of a number of Chinese species that were assessed for their horticultural merit at the Morton Arboretum, Illinois where it was adjudged suitable for planting in parks and gardens. It was found to have a good resistance to Dutch elm disease and elm leaf beetles, but was typically intolerant of wet soils [2].
There are no known cultivars of this taxon, nor is it known to be available from any nurseries beyond the USA.
[edit] Arboreta etc accessions
- North America
- Denver Botanic Gardens, no details available
- Holden Arboretum, acc. no. 96-178, provenance unrecorded
- Morton Arboretum acc. nos. 317-90, 51-95, 655-2006.
- University of British Columbia Botanical Garden, Vancouver, acc. no. 022715-0334-1983.
- Europe
- Royal Botanic Garden Edinburgh, UK, acc. no. 19951216. Wild collected in Yunnan province, China.
- Royal Horticultural Society gardens, Wisley, bed WA 0201; (planted 1998), (the tree appeared to have succumbed to the drought of summer 2006, and all top growth had died save a few suckers at the base).
- Strona Arboretum [3], University of Life Sciences, Warsaw, Poland.
[edit] Nurseries
- North America
[edit] References
- ^ 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. [1]
- ^ Ware, G. (1995). Little-known elms from China: landscape tree possibilities. Journal of Arboriculture, (Nov. 1995). International Society of Arboriculture, Champaign, Illinois, USA. [2]
