Ulmus parvifolia 'Emer II'
| Ulmus parvifolia 'Emer II' | |
|---|---|
 Ulmus parvifolia Allee, North Carolina Arboretum, Asheville, NC | |
| Species | Ulmus parvifolia |
| Cultivar | 'Emer II' or 'Emerald Vase' = Allee |
| Origin | US |
Ulmus parvifolia 'Emer II' or 'Emerald Vase' (selling name Allee) is a Chinese Elm cultivar selected by Dr. Michael A. Dirr and cloned in the late 1980s from a tree planted circa 1910 on the University of Georgia campus at Athens, that had survived ice-storms undamaged.[1][2] It was patented in 1991.[3]
Description
[edit]Allee can reach a height of about 15 m, with a more upright crown shape than its stablemate Athena, its spread approximately 13 m, with arching branches bearing medium green, glossy leaves turning orange to rust red in autumn. [1] The exfoliating, mottled bark has a puzzle-like pattern, and is considered attractive.[3]
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Leaves -
Bark -
Branching
Pests and diseases
[edit]The species and its cultivars are highly resistant, but not immune, to Dutch elm disease, and unaffected by the Elm Leaf Beetle Xanthogaleruca luteola.[4] As with the species overall, damage caused by Japanese Beetle is relatively slight (< 8% defoliation).[5]
Cultivation
[edit]Allee is reputedly drought tolerant, but in the elm trials conducted by Northern Arizona University at Holbrook, Arizona, it proved unsuited to the hot, arid climate and sustained over 50% mortality in its first year, as did its sibling Athena.[6] The tree is being evaluated in the National Elm Trial coordinated by Colorado State University.[7] With its more upright form, Allee has been described as a better street tree than the commonly planted lacebark elm 'Drake'.[8] It has been planted by the north front of Austin Hall, Oregon State University, Corvallis, Oregon.[1][9] Lines of Allee and Bosque in North Robinson Avenue and North Harvey Avenue, Oklahoma City, flank the Oklahoma City National Memorial.[10] The tree has been introduced to Australia and Europe,[citation needed] and was marketed briefly in England by the Thornhayes Nursery, Devon.
Accessions
[edit]- North America
- Bartlett Tree Experts, North Carolina, US. Acc. no. 2001-166
- Boone County Arboretum, Union, Kentucky, US. Accession number BT001113, planted 2009.[11]
- Brenton Arboretum, Dallas Center, Iowa, US. One tree, acquired 2009. Acc. no. not known.
- Harry P. Leu Gardens, Orlando, Florida.[12] No accession details available.
- Holden Arboretum, US. Acc. no. 98-26
- Scott Arboretum, US. Acc. no. 2000-006
- Smith College, US. Acc. nos 302, 33603
- U S National Arboretum [2][permanent dead link], Washington, D.C., US. Acc. no. 64442
- University of Idaho arboretum, US. One tree. Acc. no. 1998010
Nurseries
[edit]- North America
(Widely available)
- Australasia
References
[edit]- ^ a b U. parvifolia ALLÉE®, Oregon State University Landscape Plants, landscapeplants.oregonstate.edu
- ^ Lindstrom, O. M.; Dirr, M. A. (1991). "Cold hardiness of six cultivars of Chinese elm". HortScience. 26 (3): 290–2. doi:10.21273/HORTSCI.26.3.290. INIST 5458797.
- ^ a b Santamour, Frank S.; Bentz, Susan E. (May 1995). "Updated Checklist of Elm (Ulmus) Cultivars for use in North America". Journal of Arboriculture. 21 (3): 122–131. Retrieved 20 June 2016.
- ^ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
- ^ 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, pp 15, 16. University of Kentucky.
- ^ Northern Arizon University School of Forestry
- ^ National Elm Trial, Colorado State University; treehealth.agsci.colostate.edu
- ^ Eric Schmidt, 'Street Trees for Central Florida', Happy P. Leu Gardens, Orlando, Florida
- ^ U. parvifolia 'Emer II', Austin Hall, Oregon State University - Google Maps, May 2024, access date: 20 January 2025
- ^ James Burnett, Oklahoma City Streetscape, 2009, pp.117 & 121
- ^ U. parvifolia Allee, Individual plant records, Boone County Arboretum
- ^ Photographs of U. parvifolia 'Emer II' in Harry P. Leu Gardens, Orlando, Florida; Handbuch der Ulmengewächse (Handbook of the Elm Family); ulmen-handbuch.de
External links
[edit]- http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/cultivars/ulmus_parvifolia.htm[permanent dead link] Ulmus parvifolia cultivar list.
- https://web.archive.org/web/20030413074605/http://fletcher.ces.state.nc.us/programs/nursery/metria/metria11/warren/elm.htm Return of the Elm - the status of elms in the nursery industry in 2000. Warren, K., J. Frank Schmidt and Co.