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.".

Pests and diseases

The tree was heavily damaged by the Elm Leaf Beetle Xanthogaleruca luteola in trials in Oklahoma

Cultivation

The tree is not known to have been introduced to Europe but specimens are grown in North America, and in Australia 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