''Ulmus minor'' 'Umbraculifera Gracilis'

Ulmus minor 'Umbraculifera Gracilis'
'Umbraculifera Gracilis', Royal Botanic Gardens, Edinburgh
Species Ulmus minor
Cultivar 'Umbraculifera Gracilis'
Origin Späth nursery, Berlin, Germany

The Field Elm cultivar Ulmus minor 'Umbraculifera Gracilis' was obtained as a sport of 'Umbraculifera' by the Späth nursery of Berlin c.1897.[1][2] It was marketed by the Späth nursery in the early 20th century,[3] and by the Hesse Nursery of Weener, Germany, in the 1930s.[4]

Description

The tree is distinguished by its long oval crown,[1][5] but with thinner branches and smaller leaves than 'Umbraculifera'.[6]

Pests and diseases

The cultivar is susceptible to Dutch elm disease.

Cultivation

The only known surviving specimens are in the United States, and Scotland (see 'Accessions'). Henry (1913) mentions no example at Kew.[1] A specimen obtained from Späth stood in the Ryston Hall arboretum, Norfolk,[7] in the early 20th century.[8] Three trees supplied by Späth to the Royal Botanic Garden Edinburgh in 1902 as U. campestris umbraculifera gracilis[9] survive in Edinburgh (2018). A herbarium specimen from Amsterdam labelled U. carpinifolia Gled. f. 'Gracilis' var. (Späth) Rehd. matches the Edinburgh trees. The two in RBGE (one of which is base-grafted) were long known by an updated version of Melville's name for them, U. plotii × U. carpinifolia [10] [:U. minor subsp. minor × U. minor var. lockii).[11] It is known that Melville renamed some of Späth's trees at RBGE in 1958.[12] The two he called U. carpinifolia Gled. × U. plotii Druce, were, according to one RBGE herbarium sheet, formerly called U. campestris umbraculifera (see 'External links'),[13] the name of their parent tree not present in RBGE. Taken together, the evidence suggested that the three Edinburgh trees (the third is on Bruntsfield Links) were the clone Späth supplied as U. campestris 'Umbraculifera gracilis', an identification confirmed in 2016 by RBGE.[14] It is not known why Melville was permitted to disregard the trees' documented Central Asian provenance, and pronounce them hybrids of Plot Elm, a local variety of English field elm.

Other herbarium leaf-specimens labelled U. carpinifolia Gled. cv. 'Gracilis' var. Späth, however, from Dahlem and Haarlem, appear to show a clone different from the Amsterdam specimen (see External links).

Synonymy

  • Ulmus carpinifolia var. gracilis: Krüssmann , Handbuch der Laubgehölze 2: 534, 1962.
  • Ulmus camp. umbraculifera nova[15]

Accessions

North America

Europe

Nurseries

Europe

References

  1. 1 2 3 Elwes, Henry John; Henry, Augustine (1913). The Trees of Great Britain & Ireland. 7. p. 1893.
  2. ↑ kiki.huh.harvard.edu,
  3. ↑ Katalog (PDF). 108. Berlin, Germany: L. Späth Baumschulenweg. 1902–1903. pp. 132–133.
  4. ↑ Hesse, Hermann Albert (1932). Preis- und Sortenliste. pp. 96–97. Retrieved 18 January 2018.
  5. ↑ Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. Arnold Arboretum, Harvard University. 24 (6–8): 41–80. Retrieved 16 February 2017.
  6. ↑ Krüssmann, Johann Gerd (1984). Manual of Cultivated Broad-Leaved Trees and Shrubs. 3. p. 406.
  7. ↑ rystonhall.co.uk/
  8. ↑ Ryston Hall Arboretum catalogue. c. 1920. pp. 13–14.
  9. ↑ Accessions book. Royal Botanic Garden Edinburgh. 1902. pp. 45, 47.
  10. ↑ bioportal.naturalis.nl
  11. ↑ "Herbarium specimen - WAG.1853131". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. carpinifolia Gled. f. 'Gracilis' var. (Späth) Rehd. (Amsterdam specimen)
  12. ↑ bioportal.naturalis.nl
  13. ↑ "Herbarium specimen - L.1586788". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. carpinifolia Gled. × U. plotii Druce (RBGE specimen, 1958)
  14. ↑ "List of Living Accessions: Ulmus". Royal Botanic Garden Edinburgh. Retrieved 21 September 2016.
  15. ↑ Späth, F. (1896). "Einige neue und seltene gehölze der Späth'schen Baumschule". Mitteilungen der Deutschen dendrologischen gesellschaft. 5: 28. Retrieved 21 December 2016.
  16. ↑ Centrum voor Botanische Verrijking vzw: Voorraadlijst, accessdate: November 2, 2016
  17. ↑ Baumschulen Bauch GbR: Sortimentsliste 2016-17, accessdate: November 2, 2016
  • "Herbarium specimen - WAG.1853131". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. carpinifolia Gled. f. 'Gracilis' var. (Späth) Rehd. (Amsterdam specimen)
  • "Herbarium specimen - WAG.1853132". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. carpinifolia Gled. f. 'Gracilis' var. (Späth) Rehd. (Amsterdam specimen)
  • "Herbarium specimen - L.1586788". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. campestris umbraculifera (RBGE specimen C2717); renamed U. plotii × U. carpinifolia by Melville.
  • "Herbarium specimen - L.1586789". Botany catalogues. Naturalis Biodiversity Center. Cultivar name not given (RBGE specimen C2714); renamed U. plotii × U. carpinifolia by Melville
  • "Herbarium specimen - E00824800". Herbarium Catalogue. Royal Botanic Garden Edinburgh. Cultivar name not given (RBGE specimen C2714); renamed U. plotii × U. carpinifolia by Melville
  • "Herbarium specimen - E00824851". Herbarium Catalogue. Royal Botanic Garden Edinburgh. Sheet described as U. campestris umbraculifera gracilis (RBGE specimen, 1902)
  • "Herbarium specimen - E00824850". Herbarium Catalogue. Royal Botanic Garden Edinburgh. Sheet described as U. campestris umbraculifera gracilis (RBGE specimen, 1902)
  • "Herbarium specimen - E00824849". Herbarium Catalogue. Royal Botanic Garden Edinburgh. Sheet described as U. campestris umbraculifera gracilis (RBGE specimen, 1902)
  • "Herbarium specimen - WAG.1853133". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. carpinifolia Gled. var. 'Gracilis' var. (Späth) Rehd.; formerly named U. scabra Mill. × U. campestris var. umbraculifera and as U. umbraculifera gracilis (Haarlem specimen)
  • "Herbarium specimen - L.1586951". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. carpinifolia Gled. cv. 'Gracilis' var. Späth; formerly known as 'U. montana umbraculifera gracilis' (Dahlem Hortus specimen, 1925)
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