Ulmus davidiana var. japonica 'JFS-Bieberich'
| Ulmus davidiana var. japonica | |
|---|---|
| Cultivar | 'JFS-Bieberich' = Emerald Sunshine |
| Origin | Sunshine Nursery, Oklahoma, USA |
The Japanese Elm cultivar Ulmus davidiana var. japonica 'JFS-Bieberich' (sold as Emerald Sunshine) was raised by the Sunshine Nursery, Oklahoma, from seed collected in China by proprietor Steve Bieberich.[1]
Description
Emerald Sunshine 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 [1] 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.[2] The tree was summarized by Michael Dirr, Professor of Horticulture at the University of Georgia as 'impressive' [2].
Pests and diseases
Emerald Sunshine 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,[2] 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.[3][4]
Cultivation
Emerald Sunshine 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.[5]
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.
Accessions
North America
- University of Idaho Arboretum. Acc. no. 2006033
Nurseries
- North America
Synonymy
- Ulmus propinqua C. K. Schneid. 'JFS-Bieberich' = Emerald Sunshine
Etymology
Named 'JFS' for the J. Frank Schmidt nursery, Oregon, and 'Bieberich' for the proprietor of the Sunshine Nursery in Oklahoma.
References
- ^ a b Davis, T. (2007). Ulmus 'Emerald Sunshine'. Nursery Management & Production, August 2007
- ^ a b McPherson, G. et al. (2008). National elm trial: Initial report from Northern California. Western Arborist, Fall 2009, 32–36.
- ^ Brady, C., Condra, J., & Potter, D. (2008) Resistance of Landscape-suitable Elm (Ulmus spp.) Cultivars to Japanese Beetle, Leaf Miners, and Gall Makers. 2008 Research Report, Nursery & Landscape Program, 15–16. University of Kentucky.
- ^ Dirr, M. (2009). Breeding, plant introduction, marketing and the essentiality of same to the industry and gardening public.pdf.
- ^ Heybroek, H. M. (1981). The Japanese elm species and their value for the Dutch elm breeding program. Proceedings of the Dutch Elm Disease symposium and workshop. 78–90. October 5–9, 1981, Winnipeg, Manitoba.