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Ulmus laevis var. celtidea
Variety of elm
Ulmus laevis var. celtidea Rogow. [: like 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 25 millimetres (1 in) 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
- Morton Arboretum, US. Acc. no. 1302-27 Grafts (6) from Arnold Arboretum of Harvard University (received as Ulmus laevis var. celtidea).[4]
Europe
- Royal Botanic Gardens Wakehurst Place, UK. Acc. no. 1973-21047, as Ulmus laevis var. glabra obtained from a grafted tree grown at Kew now lost; provenance notes of the latter have not survived either.
Synonyms
References
- ^ Rogowicz, A. S. (1869). Fl. Kief. 229, 1869.
- ^ a b 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. ISBN 9789050112819
- ^ Specimen at the Herbarium of P. Rogowich, National Herbarium of Ukraine Archived 2010-01-28 at the Wayback Machine as Ulmus effusa Will. f. celtidea Rogow.
- ^ a b Rehder, Alfred, 'New Species, varieties ... from the collection of the Arnold Arboretum', Journal of the Arnold Arboretum, vol.19, 1938, p.264
- ^ Chitrovo, Bull. Soc. Nat. Orel i. 50, 1907
- ^ Elwes, H. J. & Henry, A. (1913). The Trees of Great Britain & Ireland. Vol. VII. pp 1848–1929. Private publication. [1]
- ^ Herbarium specimen labelled U. celtidea Litv., from Orel province, Russia, 1906; Berlin Botanical Garden, specimen B100278978
- ^ Herbarium specimen labelled U. pedunculata Foug. var. glabra, Kew; bioportal.naturalis.nl, specimen L.1581966
External links
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