Lingzhang Herb (Latin name: Lysimachia foenum-graecum Hance), also known as vanilla, pellitory, rows of grass, etc., for the primrose family pearlwort perennial herb, plant height up to 60 cm, dry with a strong aroma. Stem herbaceous, green. Leaves alternate, leaf blade broadly ovate, apex acute or slightly obtuse, herbaceous, flowers single axillary; pedicel slender, corolla yellow, anther base cordate, pollen globose. Capsule subglobose, gray-white, flowering and fruiting from May to September. Ling Xiangqiang is distributed in Guangxi, Guangdong, and Yunnan. Preferring a cool, moist environment, it grows well under broad-leaved forests with a relative humidity of 60-80%, with a suitable growing temperature of 5-30°C, requiring loose, thick, gray-black or brown-black soil. The whole grass contains similar coumarin aromatic oil, can be extracted as a flavor, used as tobacco and balsam and other spices; dry products into the box can prevent moth-eaten clothing; and for medicinal purposes, with the dispersal of wind and cold, the efficacy of the obscenity of the treatment of cold and flu, headache, on the gas lumbar pain, chest congestion and abdominal distension, spermatorrhea, roundworms, and so on, it is a valuable aromatic plants.