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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.
A walnut is the edible seed of any tree of the genus Juglans (family Juglandaceae), particularly the Persian or English walnut, Juglans regia. They are accessory fruit because the outer covering of the fruit is technically an involucre and thus not morphologically part of the carpel; this means it cannot be a drupe but is instead a drupe-like nut.
Juglandaceae (walnut family) 408 Carya tomentosa: mockernut hickory Juglandaceae (walnut family) Juglans: walnuts; Juglans cinerea: butternut; white walnut Juglandaceae (walnut family) 601 Juglans nigra: black walnut Juglandaceae (walnut family) 602 Juglans regia: Persian walnut; common walnut Juglandaceae (walnut family) Lauraceae: laurel family
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 ...
Walnut (Juglans regia) Black walnut (Juglans nigra) J. regia originated in south eastern Europe, western/central Asia, and J. nigra originated in the eastern United States. The fruit is a pseudo-drupe with a green, semi-fleshy husk. [5]
From 1,734 controlled cross walnut seedlings, Serr and Forde selected 10 new English walnut varieties for release in 1968. The Serr variety (named after Serr's death in 1968) now occupies 23,667 acres, or 12 percent, of California walnut acreage. Other varieties selected were Tehama, Gustine, Chico, and Vina.