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The American elm is a deciduous tree which, under ideal conditions, can grow to heights of 21 to 35 meters (69 to 115 feet). [3] The trunk may have a diameter at breast height (dbh) of more than 1.2 m (4 ft), supporting a high, spreading umbrella-like canopy.
Tree Family Ulmaceae Archived 4 January 2015 at the Wayback Machine Diagnostic photos of Elm species at the Morton Arboretum "Late 19th and early 20th-century photos of Elm species in Elwes & Henry's Trees of Great Britain & Ireland, v. 7" (PDF). 1913. Archived from the original (PDF) on 3 March 2016 "Elm Photo Gallery".
Ulmus 'Frontier' is an American hybrid cultivar, a United States National Arboretum introduction (NA 55393) derived from a crossing of the European Field Elm Ulmus minor (female parent) with the Chinese Elm Ulmus parvifolia in 1971. Released in 1990, the tree is a rare example of the hybridization of spring- and autumn-flowering elms.
The field elm (Ulmus minor) cultivar 'Atinia' , [1] commonly known as the English elm, formerly common elm and horse may, [2] and more lately the Atinian elm, [3] was, before the spread of Dutch elm disease, the most common field elm in central southern England, though not native there, and one of the largest and fastest-growing deciduous trees in Europe.
Ulmus parvifolia, commonly known as the Chinese elm [2] or lacebark elm, is a species native to eastern Asia, including China, India, Japan, Korea, Vietnam, [3] Siberia and Kazakhstan. [4] It has been described as "one of the most splendid elms, having the poise of a graceful Nothofagus". [5] Chinese elm as bonsai during spring growing season.
Ulmus pumila, the Siberian elm, is a tree native to Asia.It is also known as the Asiatic elm and dwarf elm, but sometimes miscalled the 'Chinese elm' (Ulmus parvifolia). U. pumila has been widely cultivated throughout Asia, North America, Argentina, and southern Europe, becoming naturalized in many places, notably across much of the United States.
The tree succumbed to Dutch elm disease and was felled in 1968. A ring count established that it had begun life in the year 1701. [61] The "Great Elm Tree" at Phillips Academy in Andover, Massachusetts is believed to have been standing for at least 200 years. It is being well cared for and receives regular treatments for Dutch elm disease.
American elm is a vase-shaped, medium to large, deciduous tree. [4] The tree can grow to greater than 30 m in height, and is distinguished by its dense, symmetrical, upright form and dark green foliage, ultimately forming a broad umbrella crown. Crotch angles can be acute, with considerable bark inclusion which can later lead to branch breakages.