Ulmus parvifolia 'Seiju'

The Chinese Elm cultivar Ulmus parvifolia 'Seiju' is a dwarf variety, a sport of 'Hokkaido'.[1]

Ulmus parvifolia 'Seiju'
Seiju Elm bonsai
Species	Ulmus parvifolia
Cultivar	'Seiju'
Origin	US

Description

'Seiju' is described as smaller than Catlin and faster growing than Hokkaido, distinguished from the latter by its larger leaves.[2]

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 is commercially available in the United States and Australia where it is popular as a bonsai subject.[4] The tree was also listed in the UK until 2002.

Accessions

North America

• Bartlett Tree Experts, US. Acc. no. 2004–519
• Missouri Botanical Garden, St. Louis, Missouri, US. Acc. nos. 1999–1924, 1999–1925, 2003–2731.
• Smith College, US. Acc. no. 29788

Europe

• Grange Farm Arboretum , Sutton St. James, Spalding, Lincs., UK. Acc. no. 836.

Nurseries

North America

(Widely available)

Australasia

• Yamina Rare Plants , Monbulk, Melbourne, Australia.

References

1. Santamour, Frank S.; Bentz, Susan E. (May 1995). "Updated Checklist of Elm (Ulmus) Cultivars for use in North America". Journal of Arboriculture. 21 (3): 122–131. Retrieved 20 June 2016.
2. Photograph of 'Seiju' branch and leaves
3. "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
4. Young, H. C. & Young, S. (1980), Intern. Bonsai, 2(3): 28, 1980