The Chinese Elm Ulmus parvifolia cultivar 'Sempervirens' is an American introduction, commonly known by the synonym 'Evergreen', and may also be in synonymy for U. parvifolia 'Pendens'.

Description

Semi-evergreen to evergreen depending on climate, it is described as having a rounded crown and gracefully arching branches bearing deep-green foliage.

Pests and diseases

The species and its cultivars are highly resistant, but not immune, to Dutch elm disease

Dutch elm disease

Dutch elm disease is a disease caused by a member of the sac fungi category, affecting elm trees which is spread by the elm bark beetle. Although believed to be originally native to Asia, the disease has been accidentally introduced into America and Europe, where it has devastated native...

, and unaffected by the Elm Leaf Beetle Xanthogaleruca luteola

Xanthogaleruca 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.sunshinenursery.com/survey.htm.

Cultivation

The tree was first listed by Bailey & Bailey in Hortus Second, 747, 1941 , and remains in commercial cultivation in the USA. It is not known to be in cultivation in Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

 or Australasia

Australasia

Australasia is a region of Oceania comprising Australia, New Zealand, the island of New Guinea, and neighbouring islands in the Pacific Ocean. The term was coined by Charles de Brosses in Histoire des navigations aux terres australes...

.

Synonymy

• Ulmus parvifolia 'Evergreen': Plant Buyer's Guide, ed. 5, 253, 1949.
• Ulmus parvifolia 'Pendens', possible synonym.
• Ulmus parvifolia sempervirens 'True Green': Monrovia Nursery Catalogue, 1971.

North America

• Bartlett Tree Experts, North Carolina
  North Carolina
  North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...
  
  . Acc. no. 1451
• Brooklyn Botanic Garden
  Brooklyn Botanic Garden
  Brooklyn Botanic Garden is a botanical garden in the borough of Brooklyn in New York City. Located near the Prospect Heights, Crown Heights, and Park Slope neighborhoods, the garden includes a number of specialty "gardens within the Garden," plant collections, and the Steinhardt Conservatory,...
  
   http://www.bbg.org/cgi/bgbase/search.cgi, New York
  New York
  New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...
  
  . Acc. no. X00486.

North America

• C J Growers, San Diego, California
  California
  California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
  
  
• ForestFarm http://www.forestfarm.com/search/search.asp?aPage=1&index=genus&field-keywords=ulmus&Go.x=7&Go.y=6, Williams, Oregon
  Oregon
  Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...
  
   (as 'Evergreen').
• Monrovia Nurseries http://www.monrovia.com/PlantInf.nsf/08510e01e61cc962882571a9005a9153/27bfb2bac6693a018825684d00725e5a!OpenDocument&Highlight=0,ulmus, Azusa
  Azusa, California
  Azusa is a city in Los Angeles County, California, United States. The population was 46,361 at the 2010 census, up from 44,712 at the 2000 census. Though sometimes assumed to be a compaction of the phrase "everything from A to Z in the USA" from an old Jack Benny joke, the place name "Azusa"...
  
  , California
  California
  California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
  
  

External links

• http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/cultivars/ulmus_parvifolia.htm Ulmus parvifolia cultivar list.