| Ulmus davidiana var. japonica 'JFS-Bieberich' | |
| Variety: | Ulmus davidiana var. japonica |
| Cultivar: | 'JFS-Bieberich' = |
| Origin: | Sunshine Nursery, Oklahoma, US |
Ulmus davidiana var. japonica 'JFS-Bieberich' (sold as ) is a Japanese Elm cultivar that was raised by the Sunshine Nursery, Oklahoma, from seed collected in China by proprietor Steve Bieberich.[1] proved only moderately successful in the US National Elm Trial, averaging a survival rate of 70% overall.[2]
attains a height of 9 m and develops a neat vase shape, the crown < 7.5 m in width borne by a stout stem. The cultivar has thick, deep-green leaves http://www.jfschmidt.com/pdfs/emeraldsunshineelm.pdf turning dull yellow in the fall. Trees planted as part of the National Elm Trial at the Bowley Plant Science Teaching Center, U C Davis, in northern California grew comparatively slowly, increasing in height by 1 m and d.b.h. by 1.6 cm per annum.[3] The tree was summarized by Michael Dirr, Professor of Horticulture at the University of Georgia as 'impressive' http://www.greenbeam.com/rs/nm_pdfs/16338_013.pdf.
is resistant to Dutch elm disease and Elm Yellows (Phloem necrosis). Foliage of trees under assessment at the aforementioned National elm trial site at U C Davis suffered minimal damage caused by the elm leaf beetle Xanthogaleruca luteola,[3] whilst damage caused by Japanese Beetle in trials at the University of Kentucky was found to be slight, owing to the dense pubescence on the underside of the leaves.[4] [5]
is tolerant of high pH levels and soil compaction; it is also very resistant to desiccating winds.[1] The species does not sucker from roots.[6]
The cultivar is represented in Europe by five young grafted trees at the Noordplant nursery, Glimmen, The Netherlands; it is not known to have been introduced to Australasia.
Named 'JFS' for the J. Frank Schmidt nursery, Oregon, and 'Bieberich' for the proprietor of the Sunshine Nursery in Oklahoma.