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Japanese Walnut

 
Japanese Walnut

 
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The Japanese Walnut (Juglans ailantifolia; synonyms J. cordiformis and J. sieboldiana), is a species of walnut
Walnut

Walnuts are plants in the family Juglandaceae. They are deciduous trees, 10–40 meter s tall , with pinnate leaves 200?900 millimetres long , with 5–25 leaflets; the shoots have chambered pith, a character shared with the wingnut but not the hickory in the same family....
 native to Japan
Japan

Japan is an island country in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, People's Republic of China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south....
 and Sakhalin
Sakhalin

Sakhalin , also Saghalien, is a large elongated island in the North Pacific, lying between 45?50' and 54?24' N. It is part of Russia and is its largest island, administered as part of Sakhalin Oblast....
. It is a deciduous
Deciduous

Deciduous means falling off at maturity or tending to fall off and is typically used in reference to trees or shrubs that lose their leaves seasonally and to the shedding of other plant structures such as petals after flowering or fruit when ripe....
 tree
TREE

TREE was a Boston hardcore punk band formed in the summer of 1990. They were active in the Boston music scene until disbanding in 2002....
 growing to 20 m tall, rarely 30 m, and 40-80 cm stem diameter, with light grey bark
BARK

BARK was an early Electromechanics. BARK was built using standard phone relays, implementing a 32-bit binary machine and could perform addition in 150 ms and multiplication in 250 ms....
. The leaves
Leaf

In botany, a leaf is an above-ground plant Organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the cells containing chloroplast to light over a broad area, and to allow light to penetrate fully into the tissues....
 are pinnate, 50-90 cm long, with 11-17 leaflets, each leaflet 7-16 cm long and 3-5 cm broad. The whole leaf is downy-pubescent, and a somewhat brighter, yellower green than many other tree leaves.






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The Japanese Walnut (Juglans ailantifolia; synonyms J. cordiformis and J. sieboldiana), is a species of walnut
Walnut

Walnuts are plants in the family Juglandaceae. They are deciduous trees, 10–40 meter s tall , with pinnate leaves 200?900 millimetres long , with 5–25 leaflets; the shoots have chambered pith, a character shared with the wingnut but not the hickory in the same family....
 native to Japan
Japan

Japan is an island country in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, People's Republic of China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south....
 and Sakhalin
Sakhalin

Sakhalin , also Saghalien, is a large elongated island in the North Pacific, lying between 45?50' and 54?24' N. It is part of Russia and is its largest island, administered as part of Sakhalin Oblast....
. It is a deciduous
Deciduous

Deciduous means falling off at maturity or tending to fall off and is typically used in reference to trees or shrubs that lose their leaves seasonally and to the shedding of other plant structures such as petals after flowering or fruit when ripe....
 tree
TREE

TREE was a Boston hardcore punk band formed in the summer of 1990. They were active in the Boston music scene until disbanding in 2002....
 growing to 20 m tall, rarely 30 m, and 40-80 cm stem diameter, with light grey bark
BARK

BARK was an early Electromechanics. BARK was built using standard phone relays, implementing a 32-bit binary machine and could perform addition in 150 ms and multiplication in 250 ms....
. The leaves
Leaf

In botany, a leaf is an above-ground plant Organ specialized for photosynthesis. For this purpose, a leaf is typically flat and thin, to expose the cells containing chloroplast to light over a broad area, and to allow light to penetrate fully into the tissues....
 are pinnate, 50-90 cm long, with 11-17 leaflets, each leaflet 7-16 cm long and 3-5 cm broad. The whole leaf is downy-pubescent, and a somewhat brighter, yellower green than many other tree leaves. The flower
Flower

A flower, sometimes known as a bloom or blossom, is the reproduction structure found in flowering plants . The biological function of a flower is to mediate the union of male sperm with female ovum in order to produce seeds....
s are inconspicuous yellow-green catkin
Catkin

A catkin or ament is a slim, cylindrical flower cluster, with inconspicuous or no petals, usually wind-pollination but sometimes insect pollinated ....
s produced in spring at the same time as the new leaves appear. The fruit
Fruit

The term fruit has different meanings dependent on context, and the term is not synonymous in food preparation and biology. In botany, which is the scientific study of plants, fruits are the ripened Ovary of flowering plants....
 is a nut
Nut (fruit)

Nut is a general term for the large, dry, oily seed or fruit of some plant. While a wide variety of dried seeds and fruits are called nuts, only a certain number of them are considered by biologists to be true nuts....
, produced in bunches of 4-10 together; the nut is spherical, 3-5 cm long and broad, surrounded by a green husk before maturity in mid autumn.

Uses

The nuts have an oily texture. The husks are also used to make a yellowish dye.

The very bold, decorative leaves make it an excellent ornamental tree
Ornamental plant

Ornamental plants are typically grown in the flower garden or as house plants. Most commonly they are grown for the display of their flowers. Other common ornamental features include leaves, scent, fruit, Plant stem and bark....
 for planting in park
Park

A park is a Environmental protection, in its natural or semi-natural state or planted, and set aside for human recreation and enjoyment....
s and large garden
Garden

A garden is a planned space, usually outdoors, set aside for the display, cultivation, and enjoyment of plants and other forms of nature. The garden can incorporate both natural and man-made materials....
s.

Unlike the closely related and very similar North America
North America

North America is the northern continent of the Americas, situated in the Earth's northern hemisphere and almost totally in the western hemisphere....
n Butternut
Butternut (tree)

Juglans cinerea, commonly known as Butternut or White Walnut, is a species of walnut native to the eastern United States of America and southeast Canada, from southern Quebec west to Minnesota, south to northern Alabama and southwest to northern Arkansas.Snow, cited above, says "New Brunswick to Georgia, westward to Dakota and...
, Japanese Walnut is resistant to the canker
Canker

Canker and anthracnose are general terms for a large number of different Plant pathology, characterised by broadly similar symptoms including the appearance of small areas of dead tissue, which grow slowly, often over a period of years....
 disease
Disease

A disease or medical condition is an abnormal condition of an organism that impairs bodily functions, associated with specific symptoms and Medical signs....
 caused by the fungus
Fungus

A fungus is a Eukaryote organism that is a member of the Kingdom Fungi . The fungi are a monophyletic group, also called the Eumycota , that is phylogeny distinct from the morphologically similar slime molds and water molds ....
 Sirococcus clavigignenti-juglandacearum. This has led to its being planted as a replacement for Butternuts in North America. The two species hybridise readily; the resulting hybrid Juglans x bixbyi is also resistant to canker and is likewise planted as a replacement for Butternuts. Japanese Walnut is distinguished from Butternut by its larger leaves and round (not oval) nuts.

The wood
Wood

Wood is an organic material; in the strict sense wood is produced as secondary xylem in the stems of woody plants, notably trees but also shrubs, etc....
 is light and takes polish well, but is of much lower quality than Persian Walnut
Persian Walnut

Juglans regia , is the original walnut tree of the Old World. It is native in a region stretching from the Balkans eastward to the Himalayas and southwest China....
 wood. It is often used to make furniture
Furniture

Furniture is the mass noun for the movable objects which may support the human body , provide storage, or hold objects on horizontal surfaces above the ground....
.

Cultivars

The Heartnut is a cultivar
Cultivar

A cultivar is a cultivated plant that has been selected and given a unique name because of its decorative or useful characteristics; it is usually distinct from similar plants and when Plant propagation it retains those characteristics....
 of Japanese Walnut distinguished by its fruit, which is heart-shaped in cross section, easier to crack, and able to yield an unbroken nut meat when cracked. The Heartnut is a sweet nut without a bitter aftertaste often intrinsic with Black and Persian Walnuts.

Diseases

The only significant disease Japanese Walnuts are susceptible to is the Walnut Bunch Disease.

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