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Ulmus laevis Pall., variously known as the European white elm, [2] fluttering elm, spreading elm, stately elm and, in the United States, the Russian elm, is a large deciduous tree native to Europe, from France [3] northeast to southern Finland, east beyond the Urals into Kyrgyzstan and Kazakhstan, and southeast to Bulgaria and the Crimea; there are also disjunct populations in the Caucasus and ...
"Elms resistant to Dutch elm disease" (PDF). Arboriculture Research Note. 2/96. Revised by J.F. Webber. Alice Holt Lodge, Farnham: Arboricultural Advisory & Information Service: 1–9. ISSN 1362-5128; Collin, E. (2001). Elm. In Teissier du Cros (Ed.) (2001) Forest Genetic Resources Management and Conservation. France as a case study.
Ulmus parvifolia, commonly known as the Chinese elm [2] or lacebark elm, is a species native to eastern Asia, including China, India, Japan, Korea, and Vietnam. [3] It has been described as "one of the most splendid elms, having the poise of a graceful Nothofagus".
The Ulmaceae (/ ʌ l ˈ m eɪ s i /) are a family of flowering plants that includes the elms (genus Ulmus), and the zelkovas (genus Zelkova). [3] Members of the family are widely distributed throughout the north temperate zone, and have a scattered distribution elsewhere except for Australasia.
The tree has a high resistance to the fungus Ophiostoma himal-ulmi endemic to the Himalaya and the cause of Dutch elm disease there. However, U. wallichiana was found to be one of the most preferred elms for feeding and reproduction by the adult elm leaf beetle Xanthogaleruca luteola [4] and highly preferred for feeding by the Japanese beetle Popillia japonica [5] in the United States.
A photograph of the tree [78] can be found (plate 402) in Elwes & Henry's Trees of Great Britain & Ireland, published in 1913, wherein it is identified as U. nitens (U. minor subsp. minor). [ 75 ] The Oudemanhuispoort Elm. 34.6 m tall and 4.4 m in girth, this Ulmus × hollandica 'Belgica' in Oudemanhuispoort, Amsterdam , planted in 1895, is the ...
The starting-points for List of elm cultivars, hybrids and hybrid cultivars were fourfold: (1) Green's 'Registration of Cultivar Names in Ulmus ' (1964), [1] based on the contemporary nomenclature of elm species and wild hybrids; (2) Krüssmann's confirmation or correction of cultivar-names in his monumental Handbuch der Laubgehölze (1976); [2] (3) Heybroek's table of Netherlands research ...
In California 'Valley Forge' has also been found to be susceptible to leaf curling aphids (Eriosoma sp.) which produce honeydew [2] The cultivar is only moderately preferred for feeding by the Japanese Beetle Popillia japonica, [4] but the species as a whole is the most susceptible of all the elms to verticillium wilt. [5]