The Black Walnut or American 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 also known as English Walnut and Persian Walnut.Trees range in height from 70-150 feet and have a diameter of 2-4 feet. The compound leaves are between 1 and 2 feet long. The tree has large, pinnately compound leaves, 12 to 24 inches long with 15 to 23 leaflets. The leaf stems are covered with fine hairs, but are smoother than butternut. The fruit is a large, rounded, brownish black nut with a hard, thick, finely ridged shell enclosing a rich, oily kernel.The nut is black and ridged with the kernel having a high-quality taste. The kernel is edible and highly nutritious.Blackwalnut contains tannins and quinone compounds. These tannins and quinone compounds are the primary components that give this herb the ability to expel worms and other parasites.
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