Morton Accolade™ is an elm cultivar derived from a hybrid planted at the Morton Arboretum in 1924, which itself originated as seed collected from a tree at the Arnold Arboretum in Massachusetts. although this tree was originally identified as Ulmus crassifolia, it is now is believed to have been a hybrid of the Japanese Elm Ulmus davidiana var. japonica and Wilson's Elm, the latter now sunk as another form of Ulmus davidiana var. japonica.

This tree at the Morton Arboretum is noted for its resemblance to the American Elm Ulmus americana, its upright-arching branches creating the familiar vase-shape. Moreover, in its 80+ years it had survived three epidemics of Dutch Elm Disease there unscathed. However, two trees included in trials at the University of Minnesota were found to be afflicted by the disease in 2004, although one appears to have recovered completely. 'Morton' has now been cloned and promoted by the Chicagoland Grows corporation as a potential substitute for the innumerable American Elms lost to disease.

'Morton' is reputed to grow well in almost all soils save those excessively wet, and is notably drought-tolerant and winter hardy. The tree grows vigorously at first, gaining as much as one meter per annum, but slows to approximately half that rate with maturity. Thus, a typical 20 year-old tree could be expected to have reached 10 m in height with a crown about 5 m in width. 'Morton' has also proved to be highly resistant to elm yellows and the elm leaf beetle. It is currently being evaluated in the National Elm Trial coordinated by Colorado State University.

Hybrid cultivars
Morton Accolade™ was crossed with the hybrid cultivar 'Morton Plainsman' Vanguard™. A selection of the resultant seedlings was marketed under the name 'Charisma', later changed to 'Morton Glossy' Triumph™. --From Wikipedia

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