Ulmus Davidiana Var. Japonica

Description

Ulmus Davidiana Var. Japonica, commonly known as the Japanese Elm, is a deciduous tree that can grow up to 30 meters tall. It belongs to the Ulmaceae family and is native to East Asia, particularly China, Korea, and Japan. The tree is valued for its ornamental and shade qualities and is commonly used in landscaping.

Taxonomic Information

Domain	Eukaryota
Kingdom	Plantae
Phylum	Spermatophyta
Class	Magnoliopsida
Order	Rosales
Family	Ulmaceae
Genus	Ulmus

Appearance

The Japanese Elm has a rounded shape with a broad canopy of dark green leaves that turn yellow in the fall. The leaves are simple, alternate, and have serrated margins. The tree produces small, reddish-purple flowers in early spring before the leaves emerge. The fruit is a samara, a dry winged seed, that is dispersed by wind. The bark is dark gray and deeply furrowed with prominent ridges.

Care Guide

The Japanese Elm thrives in moist, well-drained soil and full sun to partial shade. It is hardy in USDA zones 5-9. Water the tree deeply once a week during dry periods, and fertilize in the spring with a balanced fertilizer. Prune in the winter to remove dead or diseased branches and maintain its shape.

Common Pests & Diseases

The Japanese Elm is susceptible to Dutch elm disease, a fungal infection that can be fatal. Symptoms include wilting, yellowing, and browning of the leaves. The disease is spread by bark beetles and can be prevented by proper pruning and sanitation practices. Other pests that can affect the tree include aphids, scale insects, and elm leaf beetles.

Habitat

The Japanese Elm is native to East Asia, particularly China, Korea, and Japan. It grows in a variety of habitats, including forests, riverbanks, and hillsides.

Question and Answer

Q: Is the Japanese Elm a fast-growing tree?

A: Yes, the Japanese Elm is considered a fast-growing tree, particularly in its youth.

Q: How often should I water my Japanese Elm?

A: Water deeply once a week during dry periods, but avoid overwatering as it can lead to root rot.

Q: Can the Japanese Elm tolerate shade?

A: Yes, the Japanese Elm can tolerate partial shade, but it prefers full sun.

Q: Is the Japanese Elm resistant to Dutch elm disease?

A: No, the Japanese Elm is not resistant to Dutch elm disease and can be affected by it.

Related Plants

• Ulmus americana (American Elm)
• Ulmus glabra (Wych Elm)
• Ulmus parvifolia (Chinese Elm)

References

• Dirr, M. A. (2019). Manual of woody landscape plants: Their identification, ornamental characteristics, culture, propagation and uses. Timber Press.
• Gleason, H. A., & Cronquist, A. (1991). Manual of vascular plants of northeastern United States and adjacent Canada. The New York Botanical Garden Press.
• Missouri Botanical Garden. (n.d.). Ulmus davidiana var. japonica. Retrieved from https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=287029