Ulmus glaucescens var. lasiocarpa

Ulmus glaucescens var. lasiocarpa

Taxobox
status = LC
name = "Ulmus glaucescens" var. "lasiocarpa"
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Rosales
familia = Ulmaceae
genus = "Ulmus"
species = "Ulmus glaucescens"
trinomial = "Ulmus glaucescens" var. "lasiocarpa"
trinomial_authority = Rehder

"Ulmus glaucescens" var. "lasiocarpa" Rehder, named the Hairy-fruited Glaucescent Elm in the USA, is found along rivers and mountain slopes at elevations between 2500 m - 2600 m in the provinces of Hebei, Henan, Liaoning, Nei Mongol, Ningxia, eastern Qinghai, and Shanxi.

Description

The variety is distinguished by a "samara densely pubescent when young, with scattered hairs when mature. Fl. and fr. March - May."Fu, L., Xin, Y. & Whittemore, A. (2002). Ulmaceae, in Wu, Z. & Raven, P. (eds) "Flora of China", Vol. 5 (Ulmaceae through Basellaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA. [http://flora.huh.harvard.edu/china/PDF/PDF05/Ulmus.pdf] ] .

Pests and diseases

The tree was heavily damaged by the Elm Leaf Beetle "Xanthogaleruca luteola" in trials in Oklahoma [http://www.sunshinenursery.com/survey.htm] .

Cultivation

The tree is not known to have been introduced to Europe but specimens are grown in North America, and in AustraliaSpencer, R., Hawker, J. and Lumley, P. (1991). "Elms in Australia". Australia: Royal Botanic Gardens, Melbourne. ISBN 0724199624.] in cool, humid montane conditions near Adelaide. There are no known cultivars of this taxon, nor is it known to be available from any nurseries.

Accessions

North America

*Morton Arboretum, Illinois, acc. no. 537-76, raised from seed sent by the Beijing Botanical Garden.

Australasia

*Mount Lofty Botanic Garden, Piccadilly, South Australia. One tree, raised from seed sent by the Beijing Botanical Garden, planted out c. 1984, and 4.5 m high with a d.b.h. of 30 cm in 2008.

References


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