Juglans ailantifolia new leaves appear. The female flowers have pink/ red pistils. The fruit is a nut, 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. The edible nuts have an oily texture. The husks are also used to make a yellowish dye. The very bold, decorative leaves and the attractive catkins produced in spring make it an excellent ornamental tree for planting in parks and large gardens. Unlike the closely related and very similar North American butternut, Japanese walnut is resistant to the canker disease
Fruit anatomy the inner part of the peel and is commonly removed before eating. In citron fruit, where the mesocarp is the most prominent part, it is used to produce succade. Endocarp (from Greek: "endo-", "inside" + "-carp", "fruit") is a botanical term for the inside layer of the pericarp (or fruit), which directly surrounds the seeds. It may be membranous as in citrus where it is the only part consumed, or thick and hard as in the stone fruits of the family Rosaceae such as peaches, cherries, plums, and apricots. In nuts, it is the stony layer that surrounds the kernel