| Valsa ambiens | |
|---|---|
 | |
| Valsa ambiens on apple branch | |
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Sordariomycetes |
| Order: | Diaporthales |
| Family: | Valsaceae |
| Genus: | Valsa |
| Species: | V. ambiens |
| Binomial name | |
| Valsa ambiens (Pers.) Fr., (1849) | |
| Synonyms | |
Cryptodiaporthe populina(Fuckel) Petr., (1921) | |
Elms are deciduous and semi-deciduous trees comprising the flowering plant genus Ulmus in the plant family Ulmaceae. The genus first appeared in the Miocene geological period about 20 million years ago, originating in what is now central Asia. These trees flourished and spread over most of the Northern Hemisphere, inhabiting the temperate and tropical-montane regions of North America and Eurasia, presently ranging southward in the Middle East to Lebanon, and Israel, and across the Equator in the Far East into Indonesia.
The cedar elm cultivar Ulmus crassifolia 'Brazos Rim' was cloned from a tree growing at the Sunshine Nursery, Clinton, Oklahoma.
The Japanese Elm cultivar Ulmus davidianavar.japonica 'Mitsui Centennial' is a cold-resistant selection raised at the Morden Experimental Station, Manitoba, Canada, in the 1970s.
The Chinese Elm cultivar Ulmus parvifolia 'Chessins' is a compact Lacebark Elm used in landscaping.
The Chinese Elm cultivar Ulmus parvifolia 'Pathfinder' is another development by A. M. Townsend of the USDA National Arboretum registered in 1990.
The hybrid elm cultivar Ulmus × intermedia 'Lincoln' was selected from crossings of the Slippery, or Red, Elm Ulmus rubra and the Siberian Elm Ulmus pumila made in Aurora, Illinois, circa 1958 and patented in 1983 by Samuel Clegg of Clegg Landscaping, Plainfield, IL and Charles McFarland of Urbana, IL.
The Chinese Elm cultivar Ulmus parvifolia 'Cork Bark' is a North American clone.
The Chinese Elm cultivar Ulmus parvifolia 'Yatsubusa' is a dwarf variety.
The American Elm cultivar Ulmus americana 'L'Assomption' was selected from seedlings grown from X-irradiated seed at the eponymous experimental station in Quebec before 1965.
The American Elm cultivar Ulmus americana 'Jackson' was cloned from a selection made at Wichita, Kansas, which had reputedly shewn no signs of Dutch elm disease damage at >50 years of age.
Ulmus parvifolia 'D. B. Cole' is a Chinese Elm cultivar that was listed in the Arborvillage Farm Nursery Holt, Missouri, Catalogue of Fall 1991–Spring 1992, p. 21.
The Chinese Elm cultivar Ulmus parvifolia 'Prairie Shade' is an American clone selected in 1973 in Oklahoma.
The Chinese Elm cultivar Ulmus parvifolia 'Red Fall' is an American clone selected by S. Bieberich of the Sunshine Nursery, Clinton, Oklahoma.
The Chinese Elm cultivar Ulmus parvifolia 'State Fair' was cloned from a tree growing in the grounds of the Oklahoma State Fair, Oklahoma City.
The Chinese Elm cultivar Ulmus parvifolia 'Stone's Dwarf' was commercially released in the US in 1978.
The Chinese elm cultivar Ulmus parvifolia 'The Thinker' was selected by M. Hayman from a tree on the campus of the University of Louisville, Kentucky.
The Chinese Elm cultivar Ulmus parvifolia 'Orange Ribbon' was tested in the United States for cold-hardiness. The name is considered invalid by some, for want of fuller description.
The Chinese Elm cultivar Ulmus parvifolia 'Select 380' was tested in the United States for cold-hardiness. The name is considered invalid by some for want of fuller description.
The Chinese Elm cultivar Ulmus parvifolia 'Jade Empress' is an American selection.
Elmer, the Great is a 1933 American pre-Code comedy film directed by Mervyn LeRoy, starring Joe E. Brown and Patricia Ellis.
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