Ulmus 'Densa'

Ulmus 'Densa'
'Densa'
GenusUlmus
Cultivar'Densa'
OriginC. Asia

The elm cultivar Ulmus Densa was described from specimens growing near Ashkabad as U. densa Litv. in Schedae ad Herbarium Florae Rossicae (1908).[1] Litvinov, reporting it growing wild in the mountains of Turkestan, Ferghana, and Aksu, as well as in cultivation, considered it a species, a view upheld by the Soviet publications Trees and Shrubs in the USSR (1951)[2] and Flora of Armenia (1962),[3] and by some current plant lists.[4][5][note 1] Other authorities take it to be a form of U minor, distinctive only in its dense crown and upright branching.[6][7][8] The Moscow State University herbarium gives (2020) Ulmus minor as the "accepted name" of U. densa Litv..[9][10]

Litvinov considered U. minor 'Umbraculifera', with its "denser crown and more rounded form", a cultivar of U. densa,[6] calling it U. densa var. bubyriana. Rehder (1949) and Green (1964), ignoring reports of the wild form, considered U. densa a synonym of 'Umbraculifera'.[11][12] The U. densa photographed by Meyer in Aksu, Chinese Turkestan on his 1911-12 expedition does not appear to be the tidy grafted cultivar 'Umbraculifera' and was said to be named 'Seda'.[13][14] Zielińksi in Flora Iranica (1979) considered 'Umbraculifera' an U. minor cultivar.[15]

In its natural range U. densa overlaps with U. pumila. The extent of hybridization between the two is not known.

  1. ^ Schedae ad Herbarium Florae Rossicae, VI. 163-165 (1908)
  2. ^ Sokolov, S. Ya (1951). Деревья и кустарники СССР [Trees & Shrubs in the USSR] (in Russian). Vol. 2. Moscow. pp. 504–505.{{cite book}}: CS1 maint: location missing publisher (link)
  3. ^ Takhtajan, Armen Leonovich (1962). Флора Армении [Flora of Armenia] (in Russian). Vol. 4. Yerevan. pp. 341–342.{{cite book}}: CS1 maint: location missing publisher (link)
  4. ^ The Plant List: Ulmus densa Litv., accessdate: December 14, 2016
  5. ^ Tropicos: Name - Ulmus densa Litv., accessdate: December 14, 2016
  6. ^ a b Elwes, Henry John; Henry, Augustine (1913). The Trees of Great Britain & Ireland. Vol. 7. p. 1893.
  7. ^ De Langhe, Jan (7 April 2016). Vegetative key to species European cultivation (Ulmaceae) (PDF). Ghent: Ghent University Botanical Garden. p. 5. Retrieved 18 December 2016.
  8. ^ Plantarium: Ulmus densa - Галерея субтаксонов - Плантариум (in Russian), accessdate: December 18, 2016
  9. ^ Moscow State University herbarium, Specimen MW0591858, plant.depo.msu.ru
  10. ^ Moscow State University herbarium, Specimen MW0591857, plant.depo.msu.ru
  11. ^ Alfred Rehder (1949). "Bibliography of cultivated trees and shrubs hardy in the cooler temperate regions of the Northern Hemisphere". Arnold Arboretum of Harvard University. p. 142.
  12. ^ Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. 24 (6–8). Arnold Arboretum, Harvard University: 41–80. Retrieved 16 February 2017.
  13. ^ Meyer's photograph (5675) of Ulmus densa Turkestan. Aksu, Turkestan. February 1911
  14. ^ Meyer's photograph (5676) of Ulmus densa Turkestan. Aksu, Turkestan. February 1911
  15. ^ J. Zielińksi, 'Ulmaceae', Flora Iranica, ed. K. H. Rechinger (Graz, 1979)


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