A North American native plant first grown by farmers in Mexico, Corn (Zea mays) has been harvested for over 7000 years. By the time Columbus arrived in the New World, Corn was being grown from Canada to the tip of South America, but was largely unknown in Europe. Columbus recorded in his journal the many virtues of corn as taught by the Indians. Corn, with all its uses, has spread around the world. Cornsilk is the fine, silky yellowish threads that stick out from the tip of an ear of corn. It may be used fresh or dried, usually by the sun, and has a long history of health virtues. It is also used in cosmetics as a fine-grade, soothing face powder. Alvita. Natural herb teas that are good for you and the environment.