| 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, 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
- 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
- ^ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
- ^ Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. Arnold Arboretum, Harvard University. 24 (6–8): 41–80. Retrieved 16 February 2017.
External links
- http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/cultivars/ulmus_parvifolia.htm Ulmus parvifolia cultivar list.