Everything about Juglans Mandshurica totally explained
The
Manchurian walnut (
Juglans mandshurica Maxim.) is a
deciduous tree of the genus
Juglans (section
Cardiocaryon), native to the
Eastern Asiatic Region (
China,
Russian Far East,
North Korea and
South Korea). It grows to about 25 m.
The
leaves are alternate, 40–90 cm long, odd-pinnate, with 7–19 leaflets, 6–17 cm long and 2–7.5 cm broad (margin serrate or serrulate, apex acuminate). The male
flowers are in drooping catkins 9–40 cm long, the wind-pollinated female flowers (April-May) are terminal, in spikes of 4 to 10, ripening in August-October into nuts, 3-7.5 × 3-5 cm, with densely glandular pubescent green husk and very thick shell.
The tree is exceptionally hardy (down to at least -45°C), has a relatively short vegetation period compared to other walnuts, grows rapidly and is cultivated as an
ornamental in colder temperate regions all over the Northern Hemisphere. The kernels of the nuts are edible, but small and difficult to extract. The timber is in use, but less valuable than that of
English walnut or
black walnut.
The Manchurian walnut contains and exudes much lesser quantities of allelopathic compounds (such as
juglone) than other popular
Juglans species and usually doesn't cause significant
allelopathic effects in cultivation.
Juglans cathayensis, characterized by tomentose leaflets, producing more flowers per spike and growing south of the
Huang He, was sometimes recognized as a species separate from
J. mandshurica.
Further Information
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