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Walnuts Inside of a walnut in growth Three-segment walnut Walnut shell inside its green husk Artistic depiction of two walnuts (Adriaen Coorte, 1702). A walnut is the edible seed of any tree of the genus Juglans (family Juglandaceae), particularly the Persian or English walnut, Juglans regia.
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.All species are deciduous trees, 10–40 metres (33–131 ft) tall, with pinnate leaves 200–900 millimetres (7.9–35.4 in), with 5–25 leaflets; the shoots have chambered pith, a character shared with the wingnuts (Pterocarya), but not ...
Juglans nigra, the eastern American black walnut, is a species of deciduous tree in the walnut family, Juglandaceae, native to central and eastern North America, growing mostly in riparian zones. Black walnut is susceptible to thousand cankers disease , which provoked a decline of walnut trees in some regions.
Diseased trees usually die within several years. Completely free-standing trees seem better able to withstand the fungus than those growing in dense stands or forest. In some areas, 90% of the butternut trees have been killed. The disease is reported to be spreading rapidly in Wisconsin. By contrast, black walnut seems to be resistant to the ...
Juglans regia, the common walnut [1] or Persian walnut [2] amongst other regional 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.
Juglans major (literally, the larger walnut), also known as Arizona walnut, [1] is a walnut tree which grows to 50 ft tall (15 m) with a DBH of up to 0.61 metres (2 ft) at elevations of 300–2,130 m (1,000–7,000 ft) in Texas, Oklahoma, New Mexico, Arizona, and Utah. [4] It also occurs in Mexico as far south as Guerrero. [5]
Juglans californica, the California black walnut, also called the California walnut, or the Southern California black walnut, [1] is a large shrub or small tree (about 20–49 feet (6.1–14.9 m) [3]) of the walnut family, Juglandaceae, endemic to the Central Valley and the Coast Range valleys from Northern to Southern California.
Walnut tree species make up the genus Juglans, which belongs to the subtribe Juglandinae. Genera and species. Image Genus Living species Cyclocarya Iljinsk.
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