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Juglans nigra |
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Black Walnut |
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North
America |
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Upright, rather open, with
spreading branches. |
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50-75 feet tall (up to 150 feet),
with a spread of 40-80 feet |
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Plants are
monoecious. Males
flowers are in a pendulous catkin, the females
are borne in a small spike. The flowers are not
showy. |
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Leaves are alternate, pinnately
compound with 15-23 leaflets, each being 2-5
inches long, with a rounded base, acuminate
apex and irregularly serrate margins, fragrant
when crushed. |
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Fall color is yellow-green to
yellow-brown. |
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Buds are oval, grayish, ⅓
inch long, with a silky-downy covering. |
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Stems are distinctly chambered,
with broad leaf scars, the upper margin notched
enclosing axillary bud. |
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Fruit is a drupe, with the
outer layer semi-fleshy, the inner being hard
and thick-walled, the seeds being edible,
ripening in late September-October |
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Walnut Toxicity |
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Not a good
ornamental. The green hulls of J. nigra are the
source of one of the oldest dyes in
North
America for dark brown and black. |
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