Ulmus glaucescens var. lasiocarpa
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| Ulmus glaucescens var. lasiocarpa | |
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| Ulmus glaucescens var. lasiocarpa |
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Ulmus glaucescens var. lasiocarpa Rehder, named the Hairy-fruited Glaucescent Elm in the USA, is found along rivers and mountain slopes at elevations of 2500–2600 m in the provinces of Hebei, Henan, Liaoning, Nei Mongol, Ningxia, eastern Qinghai, and Shanxi.
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Description
The variety is distinguished by a "samara densely pubescent when young, with scattered hairs when mature. Fl. and fr. March–May.".[1]
Pests and diseases
The tree was heavily damaged by the Elm Leaf Beetle Xanthogaleruca luteola in trials in Oklahoma [2].
Cultivation
There are no known cultivars of this taxon, nor is it known to be in commerce.
Accessions
North America
- Morton Arboretum, Illinois. Acc. no. 537-76: two trees raised from seed sent by the Beijing Botanical Garden, one in the China garden, central section, another along the Du Page River.
- U S National Arboretum [3], Washington, D.C., USA. Acc. no. 76255.
Europe
- Grange Farm Arboretum, Sutton St James, Spalding, Lincolnshire, UK. Grafted tree. Acc. no. 700.
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 13 cm in 2008.
