The phrase "enriched flour" means that certain nutrients have been added back into the flour after they were removed during processing. Full definition
Folic acid can be found in foods such as: Brewers yeast, wheat germ, fortified cereals, whole grains, bananas, blackberries, strawberries, yogurt, asparagus, green beans, peas, avocados, broccoli, cauliflower, Brussels sprouts, raw spinach, dark leafy greens, mushrooms, orange juice, sunflower seeds, egg yolks, lentils, beans, split peas, barley, brown rice, liver and baked goods made with enriched flour. (modernmom.com)
White enriched flour starts out the same as whole wheat flour, but the bran and the germ are removed during milling, leaving the light white endosperm. (healthyeating.sfgate.com)