Gourt > Science > Biology > Flora and Fauna > Plantae > Magnoliophyta > Magnoliopsida > Juglandaceae > Juglans > Juglans nigra
The Black Walnut (Juglans nigra L.) is a native of eastern North America, where it grows, mostly alongside rivers, from southern Ontario, Canada west to southeast South Dakota, south to Georgia and southwest to central Texas.
It is a large deciduous tree attaining heights of 30–40 metres. Under forest competition it develops a tall, clear bole; the open-grown form has a short bole and broad crown. The bark is grey-black and deeply furrowed. The pith of the twigs contains air spaces. The leaves are alternate, 30–60 cm long, odd-pinnate with 15–23 leaflets, the largest leaflets located in the centre, 7–10 cm long and 2–3 cm broad. The male flowers are in drooping catkins 8 to 10 cm long, the female flowers terminal, in clusters of two to five, ripening in the autumn into a fruit with a browish-green, semi-fleshy husk and a brown corrugated nut. The whole fruit, including the husk, falls in October; the seed is relatively small and very hard.
The Black Walnut was introduced into Europe in 1629. It is cultivated there as a forest tree for its high quality wood. It is more resistant to frost than the Persian Walnut, but thrives best in the warmer regions of Europe of fertile, lowland soils with a high water table. It is a light-demanding species. The wood is used to make furniture and rifle stocks, and oil is pressed from the seeds.
More on [ Black Walnut ]
It's a Juglans nigra (Black Walnut) http://bit.ly/K8Gpk - thanks @hasenpfeffer @suzannelong @aliasA @chadtweets !
UnionSt (Justin Stn) Mon, 12 Oct 2009 04:16:56 -0000
It's a Juglans nigra (Black Walnut) http://bit.ly/K8Gpk - thanks @hasenpfeffer @suzannelong @aliasA @chadtweets !
Juglans nigra - Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.
Juglans nigra (Black Walnut) - Brief fact sheet and photographs of entire tree, leaves, fruit, twig, and bark.
Juglans nigra (Black Walnut) - Offers brief facts, including characteristics of leaf and fruit. Provides images.
Juglans nigra (Black Walnut) - Brief account includes images and distribution map.
Juglans nigra (Black Walnut) - Habitat, native range, associated forest cover, and detailed facts on reproduction and growth. Includes range map.
Juglans nigra (Black Walnut) - Photos of entire tree, bark, twig, leaf, flower, and fruit.
Juglans nigra (Black Walnut) - Images and description of this species.
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