Ulmus × hollandica 'Pioneer'
| Ulmus × hollandica 'Pioneer' | |
|---|---|
 'Pioneer', Netherlands | |
| Hybrid parentage | U. glabra × U. minor |
| Cultivar | 'Pioneer' |
| Origin | US |
The
, in 1971, 'Pioneer' was released to commerce in 1983.Description
'Pioneer' is a fast-growing tree distinguished by a dense, globular crown, which as it matures becomes more broad than tall, like its U. glabra parent,apetalous wind-pollinated flowers appear in early March.
Pests and diseases
The tree's resistance to
Elm Yellows in the United States was also found to be poor.[8]
The tree's foliage was adjudged "resistant" to
Black Spot by the Plant Diagnostic Clinic of the University of Missouri [3]
.
Cultivation
Considered "quite hardy in
American Elm.[9] 'Pioneer' has had a very limited introduction to Europe,[10] featuring in street tree trials in several Dutch cities in the late 1990s. The tree has reputedly been planted in Preston Park, Brighton, and along Tisbury Road, Hove, but does not feature in the NCCPG National Elm Collection held there.[11]
-
Elm cultivars, Netherlands; 'Pioneer' 3rd from left -
'Pioneer' in Toronto (May 2016)
Accessions
North America
- Bartlett Tree Experts, US. Acc. nos. 85–0195, 85–0199
- Denver Botanic Gardens, US. No acc. details.
- Dawes Arboretum, Newark, Ohio, US. 1 tree (2022), accession no. D1986-0021.001[12]
- Dominion Arboretum, Ottawa, Canada. No acc. details.
- Holden Arboretum, US. Acc. no. 90–58
- New York Botanical Garden, US. Acc. no. 955/97
- Smith College, US. Acc. no. 5603.
- University of Idaho Arboretum, US. One tree. Acc. no. 1990013
- U S National Arboretum [4][permanent dead link], Washington, D.C., US. Acc. no. 76233.
Europe
- Grange Farm Arboretum, Sutton St. James, Spalding, Lincolnshire, UK. Acc. No. 544
Nurseries
North America
- Bailey Nurseries [5], St. Paul, Minnesota, US.
- ForestFarm [6], Williams, Oregon, US.
- J. Frank Schmidt & Son Co. [7], Boring, Oregon, US.
- Johnson's Nursery [8], Menomonee Falls, Wisconsin, US.
- Pea Ridge Forest [9], Hermann, Missouri, US.
- Sun Valley Garden Centre [10], Eden Prairie, Minnesota, US.
Europe
- Batouwe Boomkwekerij B.V., [11], Dodewaard, Netherlands.
- Noordplant [12], Glimmen, Netherlands.
- Van Den Berk (UK) Ltd., [13], London, UK
- Westerveld Boomkwekerij B.V.[14], Opheusden, Netherlands.
References
- ^ Arthur Lee Jacobson, 'Plant of the Month, 2008' (arthurleej.com/p-o-m-Oct08.html). Photographs of 'Pioneer' elm: www.ca.uky.edu and plants.bachmanslandscaping.com
- ^ Santamour, J., Frank, S. & Bentz, S. (1995). Updated checklist of elm (Ulmus) cultivars for use in North America. Journal of Arboriculture, 21:3 (May 1995), 121–131. International Society of Arboriculture, Champaign, Illinois, US.
- ^ Photograph of autumn colouring of young 'Pioneer' elms, University of Washington campus: Arthur Lee Jacobson, 'Plant of the Month, 2008' [1]
- ISBN 9789050112819
- ^ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
- ^ McPherson, G. et al. (2008). National elm trial: Initial report from Northern California. Western Arborist, Fall 2009, pp 32-36.
- ^ Brady, C., Condra, J., & Potter, D. (2008) Resistance of Landscape-suitable Elm (Ulmus spp.) Cultivars to Japanese Beetle, Leaf Miners, and Gall Makers. 2008 Research Report, Nursery & Landscape Program, 15–16. University of Kentucky.
- ^ Sinclair, W. A., Townsend, A. M., Griffiths, H. M., & Whitlow, T. H. (2000). Responses of six Eurasian Ulmus cultivars to a North American elm yellows phytoplasma. Plant disease, Vol. 84, No.12, 1266–1270. American Phytopathological Society, St. Paul, MN
- ^ Giblin, C. P. & Gillman, J. H. (2006). Elms for the Twin Cities: A Guide for Selection and Maintenance. University of Minnesota.
- ISSN 1362-5128. Retrieved 26 October 2017.
- ^ "List of plants in the {elm} collection". Brighton & Hove City Council. Retrieved 23 September 2016.
- ^ Ulmus × hollandica 'Pioneer', The Dawes Arboretum, Arboretum Explorer (Newark, Ohio) dawesarb.arboretumexplorer.org
External links
- http://www.extension.iastate.edu/Publications/SUL4.pdf Summary, inc. photographs, of elm cultivars resistant to Dutch elm disease available in the United States.
- https://web.archive.org/web/20030413074605/http://fletcher.ces.state.nc.us/programs/nursery/metria/metria11/warren/elm.htm Warren, K., J. Frank Schmidt & Son Co. (2002). The Status of Elms in the Nursery Industry in 2000.