The ancient name is "apiacea" (qìn). It is the dried above-ground part of Artemisia annua L., family Compositae. It is used for clearing heat, removing vapor, and stopping malaria. It is used in treating summer fever, yin deficiency fever, night fever and early coolness, bone vapor and labor fever, malaria, cold fever, damp-heat and jaundice. It is a cheap anti-malarial drug.