is a specific kind of: dicot genus, magnoliopsid genus.

has as a member: walnut, walnut tree | California black walnut, Juglans californica | butternut, butternut tree, Juglans cinerea, white walnut | black hickory, black walnut, black walnut tree, Juglans nigra | Circassian walnut, English walnut, English walnut tree, Juglans regia, Persian walnut.

is a member of: family Juglandaceae, Juglandaceae, walnut family.