Myristica fragrans (scientific name: Myristica fragrans) is an evergreen tree plant belonging to Myristica family. Small trees; young branches slender. It is a famous tropical spice and medicinal plant. In winter and spring, the fruits are harvested when they are ripe.Its seed kernel can be used as medicine to treat deficiency diarrhea, cold diarrhea, abdominal pain, vomiting and so on; external use can be used as a parasite repellent to treat rheumatic pain and so on. In addition, it can also be used as condiment and industrial oil raw material. Limonella is an important medicinal plant.