... method: HPLC Botanical Name: Lepidium apetalum Willd./Descurainia sophia (L. ) Webb ex PrantlAbout Pepperweed Seed Extract: Pepperweed Seed or Tansymustard Seed ... ripe seed of Lepidium apetalum Willd. or Descurainia sophia (L. ) Webb ex Prantl. (Fam. Cruciferae).Functions: To quench fire in the ...