Ulmus parvifolia 'Sempervirens'

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'.

Ulmus parvifolia 'Sempervirens'
'Sempervirens' at Huntington Botanic Garden, Pasadena, California (circa 1951).
Species	Ulmus parvifolia
Cultivar	'Sempervirens'
Origin	US

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 , New York, US. Acc. no. X00486.

Nurseries

North America

• C J Growers, San Diego, California, US.
• ForestFarm , Williams, Oregon, US. (as 'Evergreen').
• Monrovia Nursery , Azusa, California, US.

References

1. "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
2. 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.