Field wormwood (Artemisia campestris) belongs to the Asteraceae (the Aaster family). It is a biennial or perennial herb that is native to Kagoshima prefecture, Okinawa, Taiwan and a wide region of Eurasia and North America. This herb grows in river banks, sea coasts, dry sandy soils in steppes, rocky slopes, and waste areas, and up to a height of 30-80 cm. The stem is much branched. The leaves are mostly basal and cauline leaves are narrow pinnately lobed. They are densely to sparsely white-pubescent. The pale yellow numerous flower-heads bloom in the terminal long spikes from July to September.