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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 ...
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 ...
Ulmus minor Mill., the field elm, is by far the most polymorphic of the European species, although its taxonomy remains a matter of contention.Its natural range is predominantly south European, extending to Asia Minor and Iran; its northern outposts are the Baltic islands of Öland and Gotland, [2] although it may have been introduced by humans.
It is commonly known as Spanish elm, Ecuador laurel, [4] cypre [3] or salmwood. [3] ... as it has overtaken natural forests by multiplying at a faster rate than being ...
Ulmus americana, generally known as the American elm or, less commonly, as the white elm or water elm, [a] is a species of elm native to eastern North America. The trees can live for several hundred years. It is a very hardy species that can withstand low winter temperatures, but it is affected by Dutch elm disease.
The tree's natural range in eastern England overlaps with that of wych elm (Ulmus glabra), the two species hybridizing to produce elms of the Ulmus × hollandica group. Nursery cultivars in this group with English U. minor subsp. minor in their parentage include 'Vegeta', 'Cicestria', and 'Smithii'.
The American Elm cultivar Ulmus americana 'Jefferson' was cloned from a tree growing near a path in front of the Freer Gallery of Art, close to the Smithsonian Institution Building ("The Castle") on the National Mall in Washington, D.C. [1] The United States National Park Service, which had planted the tree during the 1930s, cloned it in 1993 after screening tests showed that it possessed an ...
Ulmus mexicana, the Mexican elm, is a large tree endemic to Mexico and Central America. It is most commonly found in cloud forest and the higher elevations (800–2,200 m (2,600–7,200 ft)) of tropical rain forest with precipitation levels of 2–4 m (79–157 in) per year, [2] ranging from San Luis Potosi south to Chiapas in Mexico, and from Guatemala to Panama beyond.