Ulmus × hollandica 'Superba' (English Wikipedia)

Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. 24 (6–8). Arnold Arboretum, Harvard University: 41–80. Retrieved 16 February 2017.
Hanham, F. (1857). A Manual for the Park (Royal Victoria Park, Bath). Longman, London.
"New and splendid ornamental elm - Ulmus montana superba". The Gardeners' Chronicle and Agricultural Gazette: 670. 1845.
Lindley, J., 'The Elm', The Gardeners' Chronicle and Agricultural Gazette, 13 September 1845, p.628, col.3
Rehder, Alfred (1915). "Neue order kritische Gehölze". Mitteilungen der Deutschen Dendrologischen Gesellschaft. 24: 215–219. Retrieved 18 October 2017.
Rehder, Alfred. "Ulmaceae". Bibliography of cultivated trees and shrubs hardy in the cooler temperate regions of the Northern Hemisphere. Jamaica Plain, Massachusetts: The Arnold Arboretum of Harvard University. pp. 135–143. Retrieved 18 October 2017.
Heinricy, B (1908). "Baumpflanzungen in den städten". Die Gartenkunst. 10: 50. Retrieved 17 June 2016.
Elwes, Henry John; Henry, Augustine (1913). The Trees of Great Britain & Ireland. Vol. 7. pp. 1873–1874. Republished 2004 Cambridge University Press, ISBN 9781108069380
Hartwig, Karl Gustav (1913). "Ulmus praestans". Mitteilungen der Deutschen Dendrologischen Gesellschaft. 22: 302.
Berndt, C. (1915). "Notizen über Ulmen". Mitteilungen der Deutschen Dendrologischen Gesellschaft. 24: 288. Retrieved 18 October 2017.
Inman, T. Frederic (1905). "The Elm". Proceedings of the Bath Natural History and Antiquarian Field Club. 10: 37. Retrieved 19 August 2016.
Saunders, William; Macoun, William Tyrrell (1899). Catalogue of the trees and shrubs in the arboretum and botanic gardens at the central experimental farm (2 ed.). Ottawa. pp. 74–75.
Hesse, Hermann Albert (1932). Preis- und Sortenliste. pp. 96–97. Retrieved 18 January 2018.
Hesse, Hermann A., Hauptkatalog 1956/57 (Weener, Ems, 1956); p.141-142
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biodiversitydata.nl

data.biodiversitydata.nl

"Herbarium specimen - E00824747". Herbarium Catalogue. Royal Botanic Garden Edinburgh. Sheet labelled U. montana f. superba (1903 specimen, Breslau); long shoot; "Herbarium specimen - L.1582073". Botany catalogues. Naturalis Biodiversity Center. Sheet labelled U. montana f. superba (1903 specimen, Breslau), includes short shoot; "Herbarium specimen - WAG.1847053". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. x hollandica Mill. var. 'Superba' Rehd. (Wageningen specimen, 1960)* "Herbarium specimen - WAG.1847048". Botany catalogues. Naturalis Biodiversity Center. (Wageningen)
"Herbarium specimen - L.1587031". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. x hollandica Mill. var. 'Superba' Rehd. (Arnold Arboretum specimen, 1930, with fruit)
"Herbarium specimen - WAG.1847052". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. x hollandica Mill. var. 'Superba' Rehd.; synonym U. praestans var. Späth (Haarlem specimen, with fruit); "Herbarium specimen - WAG.1847051". Botany catalogues. Naturalis Biodiversity Center. Sheet described as Ulmus Superba Henry, synonym U. praestans Schoch; "Herbarium specimen - WAG.1847050". Botany catalogues. Naturalis Biodiversity Center. Sheet re-labelled Ulmus × hollandica Mill. 'Superba' Rehd.; Vondelpark, Amsterdam; "Herbarium specimen - L.1587091". Botany catalogues. Naturalis Biodiversity Center. Royal Botanic Garden Edinburgh C2710, specimen originally labelled U. glabra Mill. 'Superba'
"Herbarium specimen - WAG.1911555". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. x hollandica Mill. var. 'Superba' Rehd. (Weener specimen, 1954, from Hesse nursery)
"Herbarium specimen - WAG.1847056". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. x hollandica Mill. 'Superba' (Garfield Park, Washington, D.C., 1966); "Herbarium specimen HUDC00010322" Howard University Herbarium; Sheet described as U. x hollandica Mill. 'Superba'; short and long shoots (Garfield Park, Washington D.C., 1966)

books.google.com

Boulger, George Simonds (1881). McLaren, John (ed.). "On British Elms". Transactions of the Royal Scottish Arboricultural Society. 9. Edinburgh: 39. Retrieved 18 October 2017.
Loudon, John Claudius (1838). Arboretum et fruticetum Britannicum. Vol. 3. p. 1404.

dendron.dk

Christensen, Tove (1990). "Roadside Trees - Stories of destiny Frederiksberg Allé and Dalgas Boulevard" (PDF). Dansk Dendrologisk Årsskrift. 8: 19–23.

dingeo.dk

'Superba' ('Praestans') avenue (bottom left), Dalgas Boulevard, Copenhagen, c.1930s

hathitrust.org

babel.hathitrust.org

Spath, L (1912). "Ulmus praestans = U. montana superba". Möllers Deutsche Gärtner-Zeitung. 27 (15): 177. Retrieved 17 October 2017.

kbhbilleder.dk

'Superba' ('Praestans') avenue, Dalgas Boulevard, Copenhagen, c.1932; kbhbilleder.dk

kew.org

epic.kew.org

"ePIC - Detailed results from Living collection for ulmus". epic.kew.org. Retrieved 2017-10-19.

naturalis.nl

bioportal.naturalis.nl

U. × hollandica 'Superba' Rehd., received as U. praestans from Späth, Berlin, naturalis.nl, specimen WAG.1847052

rbge.org.uk

data.rbge.org.uk

"Herbarium specimen - E00824747". Herbarium Catalogue. Royal Botanic Garden Edinburgh. Sheet labelled U. montana f. superba (1903 specimen, Breslau); long shoot; "Herbarium specimen - L.1582073". Botany catalogues. Naturalis Biodiversity Center. Sheet labelled U. montana f. superba (1903 specimen, Breslau), includes short shoot; "Herbarium specimen - WAG.1847053". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. x hollandica Mill. var. 'Superba' Rehd. (Wageningen specimen, 1960)* "Herbarium specimen - WAG.1847048". Botany catalogues. Naturalis Biodiversity Center. (Wageningen)
"Herbarium specimen - E00824746". Herbarium Catalogue. Royal Botanic Garden Edinburgh. Sheet described as U. montana superba (Royal Botanic Garden Edinburgh specimen, 1902, from Späth); "Herbarium specimen - E00824743". Herbarium Catalogue. Royal Botanic Garden Edinburgh. Sheet described as U. montana superba (Royal Botanic Garden Edinburgh specimen, 1902, from Späth)

elmer.rbge.org.uk

"List of Living Accessions: Ulmus". Royal Botanic Garden Edinburgh. Retrieved 21 September 2016.

uni-heidelberg.de

digi.ub.uni-heidelberg.de

Schoch, G. von (1900). "Baumpflanzungen in den städten". Die Gartenkunst. 2: 66. Retrieved 17 June 2016.

vplants.org

"Herbarium specimen - WAG.1847056". Botany catalogues. Naturalis Biodiversity Center. Sheet described as U. x hollandica Mill. 'Superba' (Garfield Park, Washington, D.C., 1966); "Herbarium specimen HUDC00010322" Howard University Herbarium; Sheet described as U. x hollandica Mill. 'Superba'; short and long shoots (Garfield Park, Washington D.C., 1966)

wikimedia.org

commons.wikimedia.org

Katalog (PDF). Vol. 108. Berlin, Germany: L. Späth Baumschulenweg. 1902–1903. pp. 132–133.
Accessions book. Royal Botanic Garden Edinburgh. 1902. pp. 45, 47.

wur.nl

edepot.wur.nl

F. J., Fontaine (1968). "Ulmus". Dendroflora. 5: 37–55. Retrieved 30 August 2017.
Heybroek, Hans M. (1963). Iepen in Sleeswijk. p. 176. Retrieved 30 August 2017.