Tillandsia usneoides, commonly known as Spanish moss or Old Man's Beard, is a flowering plant native to the Americas, known for its slender, cascading, silver-grey appearance. It's an air plant, meaning it absorbs nutrients and water from the air and rainfall rather than the soil. It's used for decorative purposes in gardens and floral arrangements, as well as for stuffing mattresses and cushions, packing material, and even in traditional medicine.