Ulmus changii
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| Ulmus changii | ||||||||||||||
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| Ulmus changii W. C. Cheng |
Ulmus changii W. C. Cheng, occasionally known as the Hangzhou Elm, is a small deciduous tree found across much of China in forests at elevations of up to 1800 m. The tree can reach a height of 20 m with a trunk of about 0.9 m d.b.h; the bark is dark grey and the leaves generally ovate, < 11 cm long, glabrescent and smooth when mature [2]. The wind-pollinated petal-less flowers are produced on second-year shoots in March - April, the samarae are almost orbicular, < 35 mm in diameter [1].
Owing to its scarcity, U. changii was added to the Hainan Province Protected Plants List in 2006. The species is currently (2006) one of a number of rare Chinese elms being assessed for their horticultural potential at the Morton Arboretum, Illinois, but is not known to be in cultivation in Europe or Australasia. There are no known cultivars of this taxon, nor is it known to be available from any nurseries.
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[edit] Subspecies & varieties
Two varieties are recognized: var. changii L.K.Fu, and var. kunmingensis W.C.Cheng.
[edit] Arboreta etc. accessions
- North America
- Morton Arboretum, Illinois. Details not known.
- Asia
[edit] Etymology
The tree is named for S. S. Chang, the Chinese botanist who identified the species in 1936.
