Ulmus bergmanniana var. lasiophylla C. K. Schneid. (Hairy-leaved Bergmann's elm) is endemic to China, on mountain slopes at elevations of 2100–2900 m in Gansu, Shaanxi, north-west Sichuan, south-east Xizang (formerly Tibet), and north-west Yunnan.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.
Description The tree is distinguished by Fu (2002) as having "Leaf blade adaxially with densely curved pubescence. Flowers and fruits February - April".Campbell University Herbarium specimen. Sheet labelled U. bergmanniana var. lasiophylla Schneid., flowers from Morton Arboretum (2011)
Cultivation Var. lasiophylla is cold hardy; in artificial freezing tests at the Morton ArboretumShirazi, A. M. & Ware, G. H. (2004). Evaluation of New Elms from China for Cold Hardiness in Northern Latitudes. International Symposium on Asian Plant Diversity & Systematics 2004, Sakura, Japan. the LT50 (temp. at which 50% of tissues die) was found to be - 27.7 °C. There are no known cultivars of this taxon, nor is it known to be in commerce.
Accessions
North America Chicago Botanic Garden, US. No accession details; planted in West Collections Area. Morton Arboretum, US. Acc. no. 45–95. Collected from the wild at an unrecorded site in China. United States National Arboretum, Washington, D.C., US. Acc. nos. 76218, 68978.
Europe Glendoick Gardens, Perthshire, UK; two trees (2017), source 'SSNY 205'. Grange Farm Arboretum , Lincolnshire, UK. Acc. no. 1057. Royal Botanic Garden Edinburgh, UK. Acc. no. 19933397. Wild collected in Kunming, China, by Gothenburg Expedition.
References
External links efloras.org: U. bergmanniana var. lasiophylla leaves and fruit illustration efloras.org: U. bergmanniana var. lasiophylla description