Genus: Juglans (walnuts) Life
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Archaeoplastida >
Chloroplastida
>
Charophyta > Streptophytina > Plantae (land plants)
> Tracheophyta (vascular plants) > Euphyllophyta > Lignophyta (woody plants)
> Spermatophyta (seed plants) > Angiospermae (flowering
plants) > Eudicotyledons > Core Eudicots > Rosids >
Eurosid I > Order: Fagales > Family: Juglandaceae
Twenty-one species (Northern Hemisphere and South America),
of which six are cultivated in southern Africa, including the
Walnut Juglans regia.
Species cultivated in southern Africa
List from Glen (2002).
Juglans ailantifolia (Japanese
walnut)
Native to Japan. |
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Juglans hindsii
Native to California. |
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Juglans mandschurica (Manchurian
walnut)
Native to northeastern China and Korea. |
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Juglans microcarpa
(Small-fruited walnut)
Native to western USA and Mexico. |
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Juglans nigra (Black walnut)
Native to eastern USA. |
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Juglans
regia (Walnut, English walnut)
Juglans regia is native to the region in Eurasia extending from the
Near East through to the Himalayas and on to Western China. Walnuts must
have been harvested from earliest times but the earliest records of actual
growing of orchards of walnut trees go back to classical Greek and Roman
times. Besides the nuts, trees are also a source of high quality wood used
for furniture and gunstocks. Growing of walnuts in Europe began in the
1500's. They are now grown worldwide and the largest production is from
California. |
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