- Ulmus pumila var. arborea
Taxobox
status = LC
name = "Ulmus pumila" var. "arborea"
image_caption = var. "arborea", Netherlands. Photo: Ronnie Nijboer, Bonte Hoek kwekerijen
regnum =Plant ae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo =Rosales
familia =Ulmaceae
genus = "Ulmus "
species = "U. pumila"
trinomial = "Ulmus pumila" L. var. "arborea"
trinomial_authority = Litv.
synonyms =
*"Ulmus pinnato-ramosa" Dieck
*"Ulmus turkestanica " Regel"U. pumila" L. var. "arborea" Litv. is endemic to western
Siberia andTurkestan . The tree was introduced to Europe byGeorg Dieck in 1894 as "U. pinnato-ramosa".Description
The tree is distinguished from the species by its greater height. The pinnate leaves are 4 - 7 cm in length, ovate-lanceolate, double-toothed and finely pointed. Var. "arborea" grows very vigorously, and can ultimately make a large tree White, J. & More, D. (2003) "Trees of Britain & Northern Europe", Cassell, London. ISBN 0-304-36192-5 ] . The USA national champion tree in
Detroit ,Michigan , is 45 m tall, with a crown of 34 m width [http://www.northern.edu/natsource/TREESA1/Siberi1.htm] .Pests and diseases
A specimen at the
Ryston Hall [http://www.rystonhall.co.uk/] ,Norfolk ,UK , arboretum, obtained from theSpäth nursery inBerlin before 1914 Ryston Hall Arboretum catalogue, circa 1920] , was killed by the earlier strain ofDutch elm disease prevalent in the 1930s.Cultivation
The tree is still occasionally found in Europe and
North America . Also introduced toAustralia , the tree was listed by nurseries there (as "turkestanica") in the early 20th century, but it is not known whether it still survives in that country. There are no knowncultivar s of this taxon, nor is it known to be available from any nurseries.Accessions
;North America
*Arnold Arboretum acc. nos. 925-83, 698-87.
*Holden Arboretum acc. no. 60-317
*New York Botanical Garden acc. no. 1032/60 ;Europe
*Hergest Croft Gardens , Kington,Herefordshire , UK. One tree, as "U. pinnato-ramosa"; no accession details available.
*Royal Botanic Garden Edinburgh , acc. nos. 19021007, 20021586
*Sir Harold Hillier Gardens ,UK , acc. no. 1977.4795, (as "U. pinnata-ramosa").
*Strona Arboretum [http://arboretum.sggw.pl/wykaz_u.html] , University of Life Sciences,Warsaw ,Poland
*University of Copenhagen Botanic Garden, details not available.References
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