Chiba University Matsudo/Kashiwa Campus Plant Database

Genus ja:

Genus en: Elm

# spp.: N/A (from genus_families table) | 16 (from names table)

Pub year:

Accepted: Accepted

Family: Ulmaceae

Family ja: ニレ

Infra familial classification:

Distribution en: N. temperate, N. Mexico

Description en: Genus of about 45 species of deciduous, rarely semi-evergreen trees and, very rarely, shrubs, occurring in woodland, thickets, and hedgerows in N. temperate regions. They have alternate, ovate to elliptic, obovate, or rounded, toothed leaves, usually with very unequally sized bases, and often attractively coloured in autumn. Clusters of tiny, bell-shaped flowers, each with 4-9 segments joined at the bases, are usually produced from axillary buds in spring, but sometimes from leafy buds in autumn; the flowers are very quickly followed by fruits, each consisting of a seed surrounded by a green to brown, rounded to elliptic, membranous wing. Cultivated for their habit and foliage, elms are mainly grown as specimen trees. U. x hollandica ’Jacqueline Hillier’ is suitable for a shrub border and for hedging.

Hardiness en: Fully hardy.

Cultivation en:

Propagation en: Sow seed in containers outdoors in autumn or spring. Take greenwood cuttings in summer, or remove rooted suckers in autumn. Bud weeping trees in summer, or graft in winter.

Pests en: Dutch elm disease is usually fatal; U. x hollandica ‘Jacqueline Hillier’, U. parvifolia and its cultivars, U. pumila, and U. ‘Sapporo Autumn Gold’ are partially resistant. A number of Asiatic species are, at present, the most disease-resistant. Elms may also be affected by honey fungus. Aphids, leafhoppers, and gall mites may be a problem.

Description ja:

Comment:

Comment ja: ニレ，オヒョウ

Type species:

Phylogenetic definition:

Update information: Created: 2007-12-06 12:51; Updated: 2022-03-09 15:20