juglans

Noun

Meaning

A genus of valuable trees, including the true walnut of Europe, and the America black walnut, and butternut.

Source: Webster's dictionary

The highest values of 25–400 mg/kg have been found in nuts of the walnut (Juglans) and hickory (Carya) genera. Source: Internet

The Black Walnut Juglans nigra is usually used. Source: Internet