Pyrethrum (scientific name: Pyrethrum cinerariifolium Trev.) is a perennial herb of the Compositae family, which can reach 60 cm in height. The rhizome is short. The stems are erect, and the basal leaves survive in the flowering stage, ovate or elliptic, and bipinnately divided. One time is completely split, lateral lobes ovate or elliptical; all leaves have petioles, basal leaves are silver-gray on both sides, and the heads are solitary and stem apex or stem, arranged in loose corymbs.