Walnut trees are any species of tree in the plant genus Juglans, the type genus of the family Juglandaceae, the seeds of which are referred to as walnuts.

Juglans regia, known by various common names including the common walnut, [1] English walnut, [2] [3] [4] or Persian walnut [2] [5] amongst other names, is a species of walnut. It is native to Eurasia in at least southwest and central Asia and southeast Europe, but its exact natural area is obscure due to its long history of cultivation.

Jan 31, 2023 · Black walnut (Juglans nigra) and butternut (Juglans cinerea) are the landscape plants most recognized by gardeners as being problems for their other plants. However, English or Persian walnut (J. regia) and hickories (Carya) also produce juglone but to a lesser degree.

About 99% of all commercially produced walnuts are grown in California. It is also grown in many areas of the United States as an ornamental tree. The genus name, Juglans, is derived from two Latin words, jovis, which means Jupiter, and glans meaning an acorn or nut.

The Juglandaceae are a plant family known as the walnut family. They are trees, or sometimes shrubs, in the order Fagales. Members of this family are native to the Americas, Eurasia, and Southeast Asia.

Juglans nigra, commonly known as Black Walnut, is a large, deciduous hardwood tree native to central and eastern North America. It is prized for its dark, richly grained wood and edible nuts.

Juglans is easy to distinguish from Carya by its chambered pith, seen by splitting a twig lengthwise, and from the remaining genera by its wingless fruits containing large, thick-shelled nuts. The recent work of Kozlowski et al. (2018) gives a …

The walnut/butternut group (Juglans spp.) contains 15 species which grow in South America [6], Eurasia [4] and North America [6]. The word juglans is the classic Latin name of walnut, meaning nut of Jupiter.

Juglans regia belongs to family Juglandaceae that originated in Persia (Grilo & Wang, 2021) and grows in almost all parts of the world with a temperate climate. Walnut is one of the most important nuts worldwide, which in 2019, world production (in shell) was 4.5 million tonnes, with China contributing 56% of the total, followed by the United ...

Juglans regia Linnaeus, the walnut of commerce, is widely cultivated in California; it is easily distinguished from native species by its leaves with 5-11 broad, entire leaflets and nuts with thin rugulose shells, not grooved or ridged.