White sagebrush (Artemisia ludovician) belongs to the Asteraceae (the Aster family). It is a perennial herb that is native from western North America to Mexico. This herb gorws along railroads, roadsides, and sometimes in dry upland areas of prairies, and up to a height of 30-100 cm. The leaves are linear, up to 10 cm long. The stems and leaves are covered with woolly gray or white hairs. The small nodding flower-heads bloom at the upper stem from August to September. Each flower-head is a cup of hairy phyllaries surrounding a center of yellowish disc florets and is about 5 mm wide. This plant had been used by many Native American groups for a variety of medicinal, veterinary, and ceremonial purposes.