The hybrid elm cultivarUlmus 'Hamburg' was originally raised by the Plumfield Nurseries, Fremont, Nebraska, circa 1932, after its discovery by Mr. Lloyd Moffet in a bed of Siberian ElmUlmus pumila seedlings from Tekamah.[1] It was later marketed by Interstate Nurseries, Hamburg, Iowa, from 1948, as 'Interstate's New Hamburg Hybrid Elm'. Green stated that it was originally said be a hybrid of Ulmus pumila (female parent) and Ulmus americana,[2] but the Hamburg Nurseries of Iowa made no such claim for it in their catalogues from 1948 onwards.[3][4][5] It is now considered more likely that Ulmus rubra was the male parent, as it was also known as 'Hybrid Chinese Elm',[2] and therefore probably synonymous with Plumfield Nurseries' 'Hybrid elm' of the same date, a known crossing of U. pumila and U. rubra,[6][7] – and so, perhaps, also synonymous with Ulmus × intermedia 'Fremont', an elm of the same parentage found a little later in Plumfield Nurseries.
An U. pumila × U. rubra parentage would, by present classification, make the cultivar Ulmus × intermedia 'Hamburg' .
A similar erroneously conjectured crossing with U. americana occurred at Plumfield Nurseries in the 1930s, with their so-called "Wheatley hybrid elm" (apparently not the European 'Wheatley'), briefly marketed in 1934: "Our variety, an attractive round-headed rapid growing tree, with medium sized glossy leaves; originally imported from Holland and hybridized with American white elm, Ulmus americana ".[8]
'Hamburg' has been described as a hardy, very rapid grower, with much stronger branching than the Siberian Elm.[9][10] Hamburg Nurseries described it as "a shapely tree with large, dark green leaves".[5] Leaves 3 to 4.5 inches long, 1.5 to 2 inches wide.[11]
Pests and diseasesedit
'Hamburg' had not (by 1995) been widely tested for resistance to Dutch elm disease.[9]
Cultivationedit
Largely confined to the United States, several were introduced to the UK. A tree in Exeter University Botanic Gardens, Exeter, Devon, however, at one time listed as 'Hamburg Hybrid' (TROBI Champion, 17 m high, 55 cm d.b.h.), has since been found to be Ulmus laevis. 'Hamburg' is not known to have been introduced to Australasia.
Notable treesedit
Two well-grown specimens, planted in 1953 and therefore among the earliest specimens sourced from the Hamburg Nurseries, stand (2022) in Arnold Arboretum, Massachusetts, USA.[11]
Synonymyedit
'Hamburg Hybrid Elm': Interstate Nurseries, Hamburg, Iowa, Catalogue, Spring 1949.
'Hybrid Chinese Elm': Plumfield Nurseries, Fremont, Nebraska.[7]
^L.A. Moffet, manager, Plumfield Nurseries, Fremont, Nebraska: Wholesale trade list for nurserymen, florists and dealers: February 10, 1934; p12
^ abSantamour, Frank S.; Bentz, Susan E. (May 1995). "Updated Checklist of Elm (Ulmus) Cultivars for use in North America". Journal of Arboriculture. 21 (3): 122–131. Retrieved 20 June 2016.
^Ulmus 'Hamburg' in Handbuch der Ulmengewächse, www.ulmen-handbuch.de [1]
^ abU. rubra x U. pumila ('Hamburg'); ulmen-handbuch.de
April 12, 2024
ulmus, hamburg, hybrid, cultivar, originally, raised, plumfield, nurseries, fremont, nebraska, circa, 1932, after, discovery, lloyd, moffet, siberian, ulmus, pumila, seedlings, from, tekamah, later, marketed, interstate, nurseries, hamburg, iowa, from, 1948, i. The hybrid elm cultivar Ulmus Hamburg was originally raised by the Plumfield Nurseries Fremont Nebraska circa 1932 after its discovery by Mr Lloyd Moffet in a bed of Siberian Elm Ulmus pumila seedlings from Tekamah 1 It was later marketed by Interstate Nurseries Hamburg Iowa from 1948 as Interstate s New Hamburg Hybrid Elm Green stated that it was originally said be a hybrid of Ulmus pumila female parent and Ulmus americana 2 but the Hamburg Nurseries of Iowa made no such claim for it in their catalogues from 1948 onwards 3 4 5 It is now considered more likely that Ulmus rubra was the male parent as it was also known as Hybrid Chinese Elm 2 and therefore probably synonymous with Plumfield Nurseries Hybrid elm of the same date a known crossing of U pumila and U rubra 6 7 and so perhaps also synonymous with Ulmus intermedia Fremont an elm of the same parentage found a little later in Plumfield Nurseries Ulmus Hamburg GenusUlmusCultivar Hamburg OriginUSAn U pumila U rubra parentage would by present classification make the cultivar Ulmus intermedia Hamburg A similar erroneously conjectured crossing with U americana occurred at Plumfield Nurseries in the 1930s with their so called Wheatley hybrid elm apparently not the European Wheatley briefly marketed in 1934 Our variety an attractive round headed rapid growing tree with medium sized glossy leaves originally imported from Holland and hybridized with American white elm Ulmus americana 8 Contents 1 Description 2 Pests and diseases 3 Cultivation 4 Notable trees 5 Synonymy 6 Accessions 7 ReferencesDescription edit Hamburg has been described as a hardy very rapid grower with much stronger branching than the Siberian Elm 9 10 Hamburg Nurseries described it as a shapely tree with large dark green leaves 5 Leaves 3 to 4 5 inches long 1 5 to 2 inches wide 11 Pests and diseases edit Hamburg had not by 1995 been widely tested for resistance to Dutch elm disease 9 Cultivation editLargely confined to the United States several were introduced to the UK A tree in Exeter University Botanic Gardens Exeter Devon however at one time listed as Hamburg Hybrid TROBI Champion 17 m high 55 cm d b h has since been found to be Ulmus laevis Hamburg is not known to have been introduced to Australasia Notable trees editTwo well grown specimens planted in 1953 and therefore among the earliest specimens sourced from the Hamburg Nurseries stand 2022 in Arnold Arboretum Massachusetts USA 11 Synonymy edit Hamburg Hybrid Elm Interstate Nurseries Hamburg Iowa Catalogue Spring 1949 Hybrid Chinese Elm Plumfield Nurseries Fremont Nebraska 7 Accessions editNorth AmericaArnold Arboretum US Acc nos 520 53 666 50 References edit Interstate s New Hamburg Hybrid Elm Inter State Nurseries Hamburg Iowa spring 1950 catalogue p 34 a b Green Peter Shaw 1964 Registration of cultivar names in Ulmus Arnoldia 24 6 8 Arnold Arboretum Harvard University 41 80 Retrieved 16 February 2017 Interstate s New Hamburg Hybrid Elm Inter State Nurseries spring 1948 catalogue p 34 1949 Photograph of young Hamburg Interstate s New Hamburg Hybrid Elm Inter State Nurseries Hamburg Iowa spring 1949 catalogue p 34 a b Inter State Nurseries Hamburg Iowa spring 1950 catalogue p 34 Plumfield Nurseries Fremont Nebraska 1942 catalogue p 20 a b Plumfield Nurseries Fremont Nebraska 1943 catalogue p 22 L A Moffet manager Plumfield Nurseries Fremont Nebraska Wholesale trade list for nurserymen florists and dealers February 10 1934 p12 a b Santamour Frank S Bentz Susan E May 1995 Updated Checklist of Elm Ulmus Cultivars for use in North America Journal of Arboriculture 21 3 122 131 Retrieved 20 June 2016 Ulmus Hamburg in Handbuch der Ulmengewachse www ulmen handbuch de 1 a b U rubra x U pumila Hamburg ulmen handbuch de Retrieved from https en wikipedia org w index php title Ulmus 27Hamburg 27 amp oldid 1118866983, wikipedia, wiki, book, books, library,
