The Langya Mountain ElmNot yet published (2025): a photograph of the cultivar's fruit and one of the bark of the original specimen. cultivar Ulmus chenmoui 'JAB Morton' (sold as ) was selected by nurseryman Jim Barborinas at Urban Forest Nursery, Mount Vernon, Washington,About Urban Forest Nursery, Inc. & Urban Forestry Services, Inc. Urban Forest Nursery & Services, Mount Vernon, Washington from seedlings sourced from Dr. George Ware of Morton Arboretum, and released in 2003 by J.F. Schmidt & Co. of Boring, Oregon.Ulmus chenmoui 'JAB Morton' , J. Frank Schmidt & Son Co., Boring, Oregon The variety is notable for its resistance to Dutch elm disease, its red-tinged fall colourNorthwest Shade Trees U. chenmoui 'JAB Morton', Northwest Shade Trees, J.F. Schmidt & Co (rare in elms where yellow is the norm), and its hardiness (USDA Zone 5). It was the first putative U. chenmoui commercial cultivar to be introduced in the West.
Not to be confused with Ulmus 'Morton'.
Description is a small to medium-sized tree notable for its early fast growth, when it is vase-shaped, but smaller maturing size, when it becomes more rounded in shape, growing to 35 ft tall by 30 ft wide. Its spring leaves are flushed with pink or red before turning green in summer. Fall leaves are yellow tinged with rusty-red. The fissured, shaggy bark is a feature of the species.Photographs labelled U. chenmoui on Plant Photo Bank of China, ppbc.iplant
Pests and diseases Resistant to Dutch Elm disease and elm leaf beetle.Summer 'JAB Morton', 'Summer Elixir' Elm, Utah State University Botanical Centre
Cultivation The cultivar, in nurseries in the northwest US, was planted in two US arboreta in 2022 (see 'Accessions').
Etymology The cultivar name 'JAB Morton' combines the nurseryman's initials with the source arboretum.
Accessions Dawes Arboretum, Newark, Ohio, US. 1 tree, accession number D2022-0031.001, planted 2022.U. chenmoui 'JAB Morton' , Dawes Arboretum, Newark, Ohio J.C. Raulston Arboretum, North Carolina State University, Raleigh, North Carolina, US. 1 tree, accession number 220426, planted 2022.U. chenmoui 'JAB Morton' , J.C. Raulston Arboretum, North Carolina State University, Raleigh, North Carolina
Nurseries North America Northwest Shade Trees (J. Frank Schmidt & Son Co), Salem, Oregon Job's Nursery, Pasco, WashingtonU. chenmoui 'JAB Morton' , Job's Nursery, Pasco, Washington Urban Forest Nursery, Mount Vernon, WashingtonU. chenmoui 'JAB Morton' , Urban Forest Nursery, Mount Vernon, Washington
Notes
References
External links Kim Shearer, 'George Ware and the Thornhill Elm: A Vision of Trees for the Future'; Arnold Arboretum, 16 June 2021; on the George Ware–J.Frank Schmidt partnership