Black Walnut ( lat.Juglans nigra ) - a typical species of trees from the genus Walnut family Juglandaceae .
Fruits and leaves
|International scientific name|
Juglans nigra L. , 1753
Wallia nigra (L.) Alef.
The natural range of the species is North America ( USA and Canada ). In 1629 , black walnut was imported into Europe  .
A tree up to 40 meters high with dark, almost black bark , covered with deep cracks.
Leaves 25-50 cm long, alternate, pinnate, with 11-23 oblong-ovate light green leaves. Leaflets 6-10 cm long, up to 3 cm wide, gradually tapering to the apex, the base is rounded, slightly unequal, the edge is irregularly finely serrated.
Blossoms at the same time as the leaves bloom. Stamen flowers are collected in multi-flowered catkins 6-15 cm long, pistil flowers in brushes of 3-5 flowers.
The fruit is green, spherical or pear-shaped, with a diameter of 3.5-5 cm, covered with glandular hairs. Endocarp (walnut) round or ovoid, pointed at the top, with a thick shell, reminiscent of a walnut .
Black walnut kernels are edible, contain 55–66% fat  .
The wood is hard, dark brown, with a beautiful texture, well polished. It makes furniture, various turning and carved products, plywood for furniture and premises  Due to the content of organic acids, essential oils, bitter glycosides, it has antiseptic and antiparasitic effects , and with respect to helminths, it acts only on mature and intermediate stages .
- For the conventionality of specifying the class of dicotyledons as a superior taxon for the plant group described in this article, see the APG Systems section of the Dicotyledonous article .
- Submissive, 1980 .
- Sokolov, 1951 .
- Schepotiev, 1985 , p. 184-192.
- Sokolov S. Ya. Genus 4. Juglans - Walnut // Trees and Shrubs of the USSR. Wild, cultivated and promising for introduction. / Ed. volumes S. Ya. Sokolov . - M. - L .: Publishing House of the Academy of Sciences of the USSR , 1951. - T. II. Angiosperms. - S. 247-248. - 612 p. - 2500 copies.
- Schepotiev F. L., Richter A. A., Pavlenko F. A. et al. Walnut-fruit forest and garden crops . - 2nd, rev. and additional .. - M .: Agropromizdat, 1985. - 224 p. Archived April 1, 2016 on Wayback Machine
- Jaromir Submissive. The trees around us. - Prague: Artia, 1980 .-- S. 87. - 188 p.
- Black Walnut in the Encyclopedia of Ornamental Garden Plants (Retrieved February 1, 2009)