Ulmus laevis var. celtidea explained

Ulmus laevis var. celtidea Rogow. [: like [[Celtis australis|''Celtis'']], the leaves] is a putative variety of European White Elm first described by Rogowicz,[1] who found the tree in 1856 along the river Dnjepr[2] near Chernihiv in what is now northern Ukraine. The type specimen is held at the National Herbarium of Ukraine.[3] The variety was first named as Ulmus pedunculata var. celtidea.[2] Litvinov (1908) considered it a species, calling it Ulmus celtidea Litv., a view not upheld by other authorities.[4]

Similar trees were later found near Briansk in Oryol Oblast, but featured larger leaves.[5]

Description

The leaves are oblong-lanceolate, but only about 25mm in length, long-acuminate at the apex, and coarsely, sharply serrate, cuneate and sub-equal at the base. The samarae were also notably smaller than the species.[6] A 1906 herbarium specimen (leaves and fruit) in the Berlin Botanical Museum labelled U. celtidea Litv., from Orel province, Russia, has, however, leaves to 2 or 3 inches.[7]

Cultivation

One specimen which grew at the Strona Arboretum, University of Life Sciences, Warsaw, Poland, (as Ulmus celtidea Litv.) died circa 2006. The tree was grown from seed collected from a tree at the Arboretum of the Forest-Technical Academy in St. Petersburg in 1961; it is not known whether this source is still alive. No cultivars or hybrid cultivars are known.

Accessions

North America

Europe

Synonyms

External links

Notes and References

  1. Rogowicz, A. S. (1869). Fl. Kief. 229, 1869.
  2. Heybroek, H. M., Goudzwaard, L, Kaljee, H. (2009). Iep of olm, karakterboom van de Lage Landen (:Elm, a tree with character of the Low Countries). KNNV, Uitgeverij.
  3. http://www.nbuv.gov.ua/herbar/vask_e.htm Specimen at the Herbarium of P. Rogowich, National Herbarium of Ukraine
  4. https://archive.org/details/mobot31753003542013/page/264 Rehder, Alfred, 'New Species, varieties ... from the collection of the Arnold Arboretum', Journal of the Arnold Arboretum, vol.19, 1938, p.264
  5. Chitrovo, Bull. Soc. Nat. Orel i. 50, 1907
  6. Elwes, H. J. & Henry, A. (1913). The Trees of Great Britain & Ireland. Vol. VII. pp 1848–1929. Private publication. http://fax.libs.uga.edu/QK488xE4/7tgbi/
  7. https://ww2.bgbm.org/Herbarium/specimen.cfm?Barcode=B100278978 Herbarium specimen labelled U. celtidea Litv., from Orel province, Russia, 1906; Berlin Botanical Garden, specimen B100278978
  8. https://bioportal.naturalis.nl/en/specimen/L.1581966 Herbarium specimen labelled U. pedunculata Foug. var. glabra, Kew; bioportal.naturalis.nl, specimen L.1581966