Ulmus glaucescens var. lasiocarpa
Ulmus glaucescens var. lasiocarpa Rehder, named the hairy-fruited glaucescent elm in the United States, is a Chinese tree 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.
| Ulmus glaucescens var. lasiocarpa | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Rosales |
| Family: | Ulmaceae |
| Genus: | Ulmus |
| Species: | |
| Variety: | U. g. var. lasiocarpa |
| Trinomial name | |
| Ulmus glaucescens var. lasiocarpa | |
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, US. 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.
- United States National Arboretum, Washington, D.C., US. Acc. no. 76255.
Europe
- Grange Farm Arboretum, Lincolnshire, UK. Two grafted trees from cuttings ex Morton. Acc. no. 700.
Australasia
- Mount Lofty Botanic Garden, Piccadilly, Australia. One tree, raised from seed sent by the Beijing Botanical Garden, planted out c. 1984, 4.5 m high, d.b.h. 13 cm in 2008.
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References
- 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.
- "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
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