Juglans ailantifolia
Japanese walnut ( Juglans ailantifolia )
The Japanese walnut ( Juglans ailantifolia ), also known as Siebold walnut, is a native deciduous tree species in Japan from the kind of walnuts ( Juglans ) in the family of the walnut family ( Juglandaceae ).
Dissemination
The home of the Japanese walnut is located in Japan and Sakhalin. In the northeastern United States it is often planted to replace the stocks of there native butternut that are heavily damaged by a triggered by the fungus Sirococcus clavigigenti - juglandacearum fungal disease. The Japanese walnut is immune to this fungal disease. In Central Europe, the tree is rarely seen.
Description
The Japanese walnut reached a tree a height of about 18 meters. It is a deciduous tree; the bark is striped light and dark gray and has shallow furrows on. The pinnate leaves are very large with 80 to 100 cm in length; they have 11 to 17 leaflets. The young branches and the leaf stem are short, but densely hairy; The hair is a dark reddish and sticky. The leaves are on top of bare, on the bottom, however, hairy on the nerves. The leaves are finely toothed and glossy green; The individual leaflets are 7-16 cm long and 3-5 cm wide.
The male catkins are 13 to 30 cm long. The female flowers appear in June to about 10 cm long upright inflorescences. The nut fruits are globose, thick and sticky hairy; they are usually grouped into 4 to 10, about 4 to 5 cm are large and tasty.
Use
The wood is light and of a lower quality than that of genuine walnut, but is also used for furniture.
System
The first description under the name Juglans ailantifolia comes from the French botanist Carrière Élie Abel and was published in 1878.
There are two varieties:
- Juglans ailantifolia var ailantifolia ( Syn: J. cordiformis var ailantifolia ( Carr. ) Rehd, J. sieboldiana Maxim. . )
- Juglans ailantifolia var cordiformis ( Makino ) Rehder ( Syn: J. coarctata Dode, J. cordiformis Maxim, J. lavalleei Dode, J. sieboldiana var cordiformis Makino, J. subcordiformis Dode. ).
The Japanese walnut hybridized (especially in North America ) are often closely related with the butternut; the hybrids are as Juglans × bisbyi Rehd. referred to.
Swell
- Alan Mitchell, translated and edited by Gerd Krüssmann: The forest and park trees in Europe: a field guide for dendrologists and nature lovers. Paul Parey, Hamburg and Berlin, 1975, ISBN 3-490-05918-2.