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The Japanese Elm cultivar Ulmus davidiana var. japonica ' Discovery' is a cold-resistant selection from Canada, raised along with 'Freedom' in the 1980s by Dr Wilbert Ronald, of Jeffries Nurseries Ltd. and Rick Durand of Shade Consulting Services, Portage la Prairie, Manitoba.
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.
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.
Ulmus 'Urban' is an American hybrid elm cultivar selected from the progeny of a controlled crossing of the Siberian Elm Ulmus pumila (female parent) with the Dutch clone '148' (U. × hollandica 'Vegeta' × U. minor '28') [1] [2] in 1958 by Toru Arisumi of the USDA at Columbus, Ohio. Clone '148' had been sent to the US from the Netherlands in ...
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 'dwarf' elm cultivar Ulmus 'Jacqueline Hillier' ('JH') is an elm of uncertain origin. It was cloned from a specimen found in a private garden in Selly Park , Birmingham , England, in 1966. [ 1 ] [ 2 ] [ 3 ] The garden's owner told Hillier that it might have been introduced from outside the country by a relative. [ 4 ]
The Chinese Elm cultivar Ulmus parvifolia 'Hallelujah' is one of three American introductions made circa 1992 that were selected for their cold hardiness (USA zone 4 tolerant). 'Hallelujah' is known to have withstood -37 °C (-35 °F) in Missouri. The tree was first listed by the Arborvillage Nursery, Holt, Missouri, in its 1993–1994 ...
The Field Elm cultivar Ulmus minor 'Sarniensis', known variously as Guernsey elm, Jersey elm, [1] Wheatley elm, [2] [3] or Southampton elm, [4] was first described by MacCulloch in 1815 from trees on Guernsey, [5] and was planted in the Royal Horticultural Society's gardens in the 1820s. [3]