Ulmus changii
Encyclopedia
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. Owing to its increasing scarcity, U. changii was added to the Hainan
Province Protected Plants List in 2006.
; the bark is dark grey and the leaves generally ovate
, < 11 cm long, glabrescent and smooth when mature http://209.85.135.104/translate_c?hl=en&u=http://www.plant.ac.cn/tu_page/83/41922.htm&prev=/search%3Fq%3Dulmus-changii%26start%3D30%26hl%3Den%26sa%3DN. The wind-pollinated apetalous flowers are produced on second-year shoots in March - April, the samarae
are almost orbicular, < 35 mm in diameter .
http://www.bioone.org/doi/full/10.1603/0022-0493%282001%29094%5B0162%3AROTCEU%5D2.0.CO%3B2 in the USA.
Zone 5. There are no known cultivar
s of this taxon, nor is it known to be in commerce.
L.K.Fu, and var. kunmingensis
W.C.Cheng.
Asia
Deciduous
Deciduous means "falling off at maturity" or "tending to fall off", and is typically used in reference to trees or shrubs that lose their leaves seasonally, and to the shedding of other plant structures such as petals after flowering or fruit when ripe...
tree found across much of China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
in forests at elevations of up to 1800 m. Owing to its increasing scarcity, U. changii was added to the Hainan
Hainan
Hainan is the smallest province of the People's Republic of China . Although the province comprises some two hundred islands scattered among three archipelagos off the southern coast, of its land mass is Hainan Island , from which the province takes its name...
Province Protected Plants List in 2006.
Description
The tree can reach a height of 20 m with a trunk of about 0.9 m d.b.hDiameter at breast height
Diameter at breast height, or DBH, is a standard method of expressing the diameter of the trunk or bole of a standing tree. DBH is one of the most common dendrometric measurements....
; the bark is dark grey and the leaves generally ovate
Leaf shape
In botany, leaf shape is characterised with the following terms :* Acicular : Slender and pointed, needle-like* Acuminate : Tapering to a long point...
, < 11 cm long, glabrescent and smooth when mature http://209.85.135.104/translate_c?hl=en&u=http://www.plant.ac.cn/tu_page/83/41922.htm&prev=/search%3Fq%3Dulmus-changii%26start%3D30%26hl%3Den%26sa%3DN. The wind-pollinated apetalous flowers are produced on second-year shoots in March - April, the samarae
Samara (fruit)
A samara is a type of fruit in which a flattened wing of fibrous, papery tissue develops from the ovary wall. A samara is a simple dry fruit and indehiscent . It is a winged achene...
are almost orbicular, < 35 mm in diameter .
Pests and diseases
U. changii was found to be among the least suitable elms for feeding and reproduction by the adult elm leaf beetle Xanthogaleruca luteolaXanthogaleruca luteola
Xanthogaleruca luteola, commonly known as the Elm Leaf Beetle, is a serious pest of the elm. Indigenous to Europe, it was accidentally introduced to North America. Both the imagines and larvae feed on the emergent leaves of the elm...
http://www.bioone.org/doi/full/10.1603/0022-0493%282001%29094%5B0162%3AROTCEU%5D2.0.CO%3B2 in the USA.
Cultivation
The species is extremely rare in cultivation beyond China, although in the USA the species is rated hardy enough for USNAUSNA
USNA may refer to:* United States Naval Academy* United States of North America. A fictional country including the modern USA as well as Canada in the 1985 computer game A Mind Forever Voyaging...
Zone 5. There are no known cultivar
Cultivar
A cultivar'Cultivar has two meanings as explained under Formal definition. When used in reference to a taxon, the word does not apply to an individual plant but to all those plants sharing the unique characteristics that define the cultivar. is a plant or group of plants selected for desirable...
s of this taxon, nor is it known to be in commerce.
Subspecies & varieties
Two varieties are recognized: var. changiiUlmus changii var. changii
Ulmus changii var. changii L. K. Fu is endemic to elevations of between 200 m - 800 m in the provinces of Anhui, Fujian, Hubei, Hunan, Jiangsu, Jiangxi, Sichuan, and Zhejiang.-Description:...
L.K.Fu, and var. kunmingensis
Ulmus changii var. kunmingensis
Ulmus changii var. kunmingensis W. C. Cheng, occasionally referred to as the Kunming Elm, is endemic to montane forests at elevations of between 600 m and 1800 m in the provinces of Guangxi, Guizhou, Sichuan, and Yunnan.-Description:...
W.C.Cheng.
Etymology
The tree is named for S. S. Chang, the Chinese botanist who identified the species in 1936.Accessions
North America- Morton ArboretumMorton ArboretumThe Morton Arboretum, in Lisle, Illinois, covers 1,700 acres and is made up of gardens of various plant types and collections of trees from specific taxonomical and geographical areas. It includes native woodlands and a restored Illinois prairie. The Arboretum has over 4,100 different species of...
. Acc. nos. not known. Cuttings grafted onto U. pumila rootstocks, planted out in 2008.
Asia
- Hangzhou Botanic Garden http://www.travelchinaguide.com/attraction/zhejiang/hangzhou/botanical-garden.htm, HangzhouHangzhouHangzhou , formerly transliterated as Hangchow, is the capital and largest city of Zhejiang Province in Eastern China. Governed as a sub-provincial city, and as of 2010, its entire administrative division or prefecture had a registered population of 8.7 million people...
, ZhejiangZhejiangZhejiang is an eastern coastal province of the People's Republic of China. The word Zhejiang was the old name of the Qiantang River, which passes through Hangzhou, the provincial capital...
, ChinaChinaChinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
. Details not known.