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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 ...
The trees are wind-pollinated, and the flowers are usually arranged in catkins. The fruits of the Juglandaceae are often confused with drupes but 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 ...
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Walnut tree species make up the genus Juglans, which belongs to the subtribe Juglandinae. Genera and species. Image Genus Living species Cyclocarya Iljinsk.
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.
It is a deciduous tree growing to 20 m (66 ft) tall, rarely 30 m (98 ft), and 40–80 centimetres (16–31 in) stem diameter, with light grey bark. The leaves are pinnate, 50–90 cm (20–35 in) long, with 11–17 leaflets, each leaflet 7–16 cm (3– 6 + 1 ⁄ 2 in) long and 3–5 cm (1–2 in) broad.
J. cinerea is a deciduous tree growing to 30 metres (98 ft) tall, rarely more. [5] Butternut is a slow-growing species, and rarely lives longer than 75 years. It has a 40–80 cm (16–31 in) stem diameter, with light gray bark.
There are also 270 coral species spread over an area of 1,000 hectares (2,500 acres). In addition, the marine fauna and flora are of 1,323 species including 44 species in the Red Data Book of Vietnam. The park has the richest diversity of 153 species of mollusc species, reported to be the highest for any island in Vietnam.