| 词条 | Ulmus americana 'Sheyenne' |
| 释义 |
| name = Ulmus americana 'Sheyenne' | species = Ulmus americana | cultivar = 'Sheyenne' | origin = Plumfield Nurseries, Fremont, Nebraska, US }} The American Elm cultivar Ulmus americana 'Sheyenne' was raised by the Plumfield Nursery, Fremont, Nebraska, and introduced to commerce in 1958.[1] 'Sheyenne' is not regarded as a valid cultivar by some authorities.[2] DescriptionThe tree is briefly described as 'of Northern origin' and 'somewhat vase-shaped' in the Plumfield Nursery wholesale trade list.[1] CultivationThe Plumfield Nursery ceased trading circa 1980; bereft of any known resistance to Dutch elm disease it is unlikely the tree remains in cultivation in North America or beyond. EtymologyThe tree was named for the town of Sheyenne in North Dakota, itself named for the Great Plains tribe of Cheyenne (sic). References1. ^1 Moffet, L. Plumfield Nursery Spring 1957 Wholesale Trade List. Plumfield Nursery, Fremont, Nebraska. {{Elm species, varieties, hybrids, hybrid cultivars and species cultivars |state=collapsed}}2. ^{{cite journal |last1=Santamour |first1=Frank S. |last2=Bentz |first2= Susan E. |date=May 1995 |title=Updated Checklist of Elm (Ulmus) Cultivars for use in North America|url=http://joa.isa-arbor.com/request.asp?JournalID=1&ArticleID=2673&Type=2|journal=Journal of Arboriculture |volume=21 |number=3|pages=122–131 |access-date=20 June 2016}} 3 : American elm cultivar|Ulmus articles missing images|Ulmus |
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