| Ulmus parvifolia 'Sempervirens' | |
|---|---|
'Sempervirens' at Huntington Botanic Garden, Pasadena, California (circa 1951). | |
| Species | Ulmus parvifolia |
| Cultivar | 'Sempervirens' |
| Origin | US |
The Chinese Elm cultivar Ulmus parvifolia 'Sempervirens' is an American introduction from south China, commonly known by the synonym 'Evergreen'. It was first listed by Bailey & Bailey in Hortus Second, 747, 1941.
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.
Cultivation
The tree remains in commercial cultivation in the USA. Wilkinson states that it was cultivated in Florida. 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
- Bartlett Tree Experts, North Carolina, US. Acc. no. 1451
- Brooklyn Botanic Garden [1], New York, US. Acc. no. X00486.
Nurseries
North America
- C J Growers, San Diego, California, US.
- ForestFarm [2], Williams, Oregon, US. (as 'Evergreen').
- Monrovia Nursery [3], Azusa, California, US.
References
- ^ a b Wilkinson, Gerald, Epitaph for the Elm (London 1978), p.87
- ^ Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. 24 (6–8). Arnold Arboretum, Harvard University: 41–80. Retrieved 16 February 2017.
- ^ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
- ^ Krüssmann, Johann Gerd, Handbuch der Laubgehölze (Vol. 3) (Paul Parey, Berlin and Hamburg, 1976); trans. Michael E. Epp, Manual of Cultivated Broad-Leaved Trees and Shrubs (Vol. 3) (Batsford, Timber Press, Beaverton, Oregon, 1984-6), p.411
External links
- http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/cultivars/ulmus_parvifolia.htm Ulmus parvifolia cultivar list.
