Ulmus parvifolia 'Sempervirens' explained
| Ulmus parvifolia 'Sempervirens' |
| Species: | Ulmus parvifolia |
| Cultivar: | 'Sempervirens' |
| Origin: | US |
The Chinese Elm cultivar Ulmus parvifolia 'Sempervirens' is an American introduction, commonly known by the synonym 'Evergreen', and may also be in synonymy for U. parvifolia 'Pendens'.
Description
Semi-evergreen to evergreen depending on climate, it is described as having a rounded crown and gracefully arching branches bearing deep-green foliage.
Pests and diseases
The species and its cultivars are highly resistant, but not immune, to Dutch elm disease, and unaffected by the Elm Leaf Beetle Xanthogaleruca luteola.[1]
Cultivation
The tree was first listed by Bailey & Bailey in Hortus Second, 747, 1941,[2] and remains in commercial cultivation in the USA. It is not known to be in cultivation in Europe or Australasia.
Synonymy
- Ulmus parvifolia 'Evergreen': Plant Buyer's Guide, ed. 5, 253, 1949.
- Ulmus parvifolia 'Pendens', possible synonym.
- Ulmus parvifolia sempervirens 'True Green': Monrovia Nursery Catalogue, 1971.
Accessions
North America
Nurseries
North America
- C J Growers, San Diego, California, US.
- ForestFarm http://www.forestfarm.com/search/search.asp?aPage=1&index=genus&field-keywords=ulmus&Go.x=7&Go.y=6, Williams, Oregon, US. (as 'Evergreen').
- Monrovia Nursery http://www.monrovia.com/PlantInf.nsf/08510e01e61cc962882571a9005a9153/27bfb2bac6693a018825684d00725e5a!OpenDocument&Highlight=0,ulmus, Azusa, California, US.
External links
- http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/cultivars/ulmus_parvifolia.htm Ulmus parvifolia cultivar list.
Notes and References
- Web site: Elm Leaf Beetle Survey. 17 July 2017. https://web.archive.org/web/20110719132152/http://www.sunshinenursery.com/survey.htm. 2011-07-19.
- Green . Peter Shaw . Peter Shaw Green . 1964 . Registration of cultivar names in Ulmus. Arnoldia . 24. 41–80 . 6–8 . . 16 February 2017.
