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Black Walnut

( Juglans nigra )

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Black Walnut
American Walnut
American Black Walnut
Eastern Black Walnut
Juglandaceae
Juglans
Juglans nigra
Linnaeus
ON
MB, QC
Characteristics

Tree

Deciduous

4

Sun

Clay, Sand, Loam

Normal, Moist

No

Yes

No

No
Habitat Considerations

Mixedwood Plains

Woodland, Prairie/Meadow/Field

Woodland, Prairie/Meadow
Design Considerations

2000 cm

5000 cm

Apr - May

Yellow|Green/Brown

No

Yes

Green|Brown

Yes

No

Yes

No

Yes

Yes

No

Squirrels

No
Conservation Status

No


0
Interesting Tidbits

Grows as a non-native in MB. MAY BE FATAL IF EATEN by those with nut anaphylaxis. Certain plants will not grow under Black Walnut trees because of the juglones that the tree puts in the soil. Walnut husks are rich in tannins and toxins. Ground husks have provided insecticides, fish poison and black dye. (Kershaw) Of all the native nut trees of North America, the Black Walnut is the most valuable save only the Pecan, and in the traditions of pioneer life and rustic childhood it is even more famous. In pioneer times nutting parties were the most highly prized of children's festivities in autumn. Walnut is a favourite flavouring for ice cream. (Peattie) Black Walnut is used especially for furniture, gunstocks, and veneer. (Lady Bird Johnson) A brown dye is obtained from the nuts, husks and bark. The green husks can be boiled to provide a yellow dye. Insects are said to avoid the walnut tree, hence it is often used as a poor man's insect repellent. When rubbed on faces, walnut leaves are said to repel flies. Plants produce a deep taproot which makes them very drought resistant when established, though they are intolerant of root disturbance. (Plants for a Future) No universal vegetative indicator of a good walnut site is known, but the presence of Kentucky coffeetree (Gymnocladus dioicus) seems to indicate such a site (10,43). In general, where yellow-poplar, white ash, red oak, basswood, sugar maple, or slippery elm (Ulmus rubra) grow well, black walnut thrives also. (Brinkman)


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