Stenotus lanuginosus is a species of flowering plant in the aster family known by the common names woolly mock goldenweed and woolly stenotus. It is native to the western United States, especially the inner Pacific Northwest, where it grows in cold, dry regions such as sagebrush plateau and high mountain slopes in subalpine and alpine climates. It is a perennial herb usually forming a compact tuft of herbage with a fibrous root system. The leaves are linear to widely lance-shaped leaves and measure up to 10 centimeters long. They are coated in white woolly fibers and are generally glandular. The inflorescence is a solitary flower head with woolly or hairy green phyllaries. The flower head contains yellow disc florets and several yellow ray florets each about a centimeter long.