Ulmus parvifolia 'Sempervirens'

The Chinese Elm cultivar Ulmus parvifolia 'Sempervirens' is an American introduction from south China,^[1] commonly known by the synonym 'Evergreen'. It was first listed by Bailey & Bailey in Hortus Second, 747, 1941.^[2]

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.^[3]

Cultivation

The tree remains in commercial cultivation in the USA. Wilkinson states that it was cultivated in Florida.^[1] 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.^[4]
• Ulmus parvifolia sempervirens 'True Green': Monrovia Nursery Catalogue, 1971.

Accessions

North America

• Bartlett Tree Experts, North Carolina, US. Acc. no. 1451
• Brooklyn Botanic Garden Archived 2016-02-01 at the Wayback Machine, 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.