Pecan trees are nut trees native to USA, quite large trees, sending down a very deep taproot to find underground water, extremely long lived – some wild trees estimated at over 1000 years old, trees adapt well to most climates. Are less bitter and have more sweetness than the walnut, and can be substituted in most recipes, useful for everything from stews to pies, cakes, fillings, soups, ice cream, candies