How Walnuts Can Boost Fertility and 17 Other Healthy Reasons Walnut is an edible kernel of the fruit from trees belonging to Juglandaceae family, in the genus: Juglan. Apart from walnuts, this tree nut family includes Brazil nuts, cashews, hazelnuts (filberts), macadamia nuts, pecans, pine nuts, and pistachios. Black and white walnuts are native to North America, specifically the Central Mississippi Valley and Appalachian area. They played an important role […]