Ulmus americana 'Lewis & Clark'

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Ulmus americana
Cultivar
'Lewis & Clark' Prairie Expedition™
Origin
North Dakota State University, USA

The American Elm Ulmus americana cultivar 'Lewis & Clark' ( Prairie Expedition™) is a new development from the North Dakota State University (NDSU) Research Foundation breeding programme, released in 2004 to commemorate the 200th anniversary of the eponymous expedition [1]. The cultivar was cloned from one remarkable tree that had survived Dutch elm disease along the Wild Rice River south west of Fargo, ND. The tree is distinguished by its broad umbrella crown and dark green foliage. The clone grows very rapidly, averaging an increase of > 1 m in height per annum when young. The tree is to be included in the National Elm Trial coordinated by Colorado State University in 2007 or 2008.

'Lewis & Clark' (Prairie Expedition™) was introduced to the UK by Butterfly Conservation in 2008, but is not known to have reached continental Europe or Australasia.

Contents 1 Arboreta etc. accessions 1.1 North America 1.2 Europe 2 Nurseries 3 Etymology 4 External links

[edit] Arboreta etc. accessions

[edit] North America

• North Dakota State University, no details known.

[edit] Europe

• Great Fontley Farm, Fareham, UK, Butterfly Conservation Elm trials plantation, Home Field. Two 1.2 m trees planted 2008.

[edit] Nurseries

• Lee Nursery Inc. [2], Fertile, Minnesota.
• Jeffries Nurseries Ltd [3], Portage la Prairie, Manitoba, Canada.
• Bylands Nurseries Ltd. [4], Kelowna, British Columbia, Canada.

[edit] Etymology

The tree is named for the Lewis & Clark prairie expedition of 1804.

[edit] External links

• http://ndsuresearchfoundation.org/Prairie%20Expedition-RFM-37.htm U. americana Lewis & Clark Prairie Expedition NDSU Plant Sciences Introduction.
• http://treehealth.agsci.colostate.edu/research/nationalelmtrial/NationalElmTrial.htm National Elm Trial