Tetradymia argyraea is a species of flowering plant in the aster family known by the common names spineless horsebrush and gray horsebrush. It is native to western North America from British Columbia to California to New Mexico, where it grows in sagebrush, woodlands, forest, scrubby open plains, and other habitat. It is a bushy shrub growing to 60 to 80 centimeters in maximum height with multibranched woody or semi-woody stems that grow from taproots. It is coated in woolly fibers with hairless strips at intervals along the branches. It has no spines. The lance-shaped leaves are no more than 4 centimeters long and woolly or silver-haired in texture. Longer-lived leaves are alternately arranged along the stem and smaller, shorter-lived leaves occur in clusters near the axils of the primary