Illicium is a precious forest tree belonging to the Magnoliaceae, Illicinae subfamily and Illicium genus. Fennel oil can be distilled from the peel, seeds, and leaves. Anise oil is found in the fresh peel. The fresh peel contains 5 to 6 fennel oil, the fresh seeds contain 1.7 to 2.7, and the fresh leaves contain 0.75 to 0.9. Fennel oil is then synthesized into anisaldehyde and anisyl alcohol. These aromatic plants are used in food, beer, cosmetics and seasonings. They are my country's traditional export commodities and enjoy a good reputation in the international market. The octagonal branches are dense and slightly drooping, and the octagonal star-shaped fruit is reddish brown. It is also a good fruit-viewing plant. Anise is an evergreen tree with irregular cracks in its bark, dense branches, extending horizontally, and new branches that are soft and drooping. The single leaves are alternate, with smooth leaf surfaces and transparent oil glands, and new branches are soft and slightly drooping. Single leaves alternate. The leaf surface is smooth with transparent oil glands, and the back of the leaf has sparse bristles. The flowers are bisexual and solitary in the leaf axils. The fruit follicle is reddish brown, radiating star-shaped, mostly with eight corners. The top of the follicle is pure or blunt-pointed, slightly recurved. The diameter of the fruit is 3.5 cm. It will crack when mature. The seeds are broad oval, smooth and brown. luster. In this genus, there are thick-skinned anise (fruiting capsules 12 to 14, woody) and Mangcao (fruiting capsules 10 to 13, woody, with a long and curved tip at the top). They are highly poisonous and cannot be eaten. They must be treated carefully. the difference. Anise is a shade-tolerant tree species and is not suitable for sunlight all day long. It is suitable for shady slopes or sheltered habitats. It will wither in habitats with strong sunlight. Star anise branches are brittle and easily broken by wind. Suitable for acidic soil with deep soil and good drainage. The suitable annual average temperature for octagonal anise is 20-23°C. The extreme minimum temperature of -3°C will cause frost damage. If the temperature is -5°C, the tree will be frozen when it grows up. It can only be grown in pots in the Yangtze River Basin and areas north of it. Star anise has high requirements for moisture. The annual rainfall in its main production areas in western and southern Guangxi is more than 1,000 mm. It is suitable for growing in low mountainous and hilly areas with an altitude of 300 to 700 meters in the northern edge of the mid-subtropical and south subtropical latitudes of 23° to 25° north. . Star anise is mainly propagated by sowing. It is necessary to choose a good seed-collecting mother tree and let the fruits continue to grow until November before harvesting. Pick the seeds before they are fully mature and not cracked, and spread them indoors to cause the fruits to crack and the seeds to fall off. In areas with frost in winter, it is advisable to stratify and then sow in spring. In areas without frost damage, it can be sown as it is harvested. The germination rate is high, and seedlings can also be raised in protected areas. For sowing, build a shade shed and cover with a sunshade net, and use drill sowing. The seeding rate is 7 to 8 kg per 667 square meters. The germination rate is 50 to 70%. The seedling height can reach 40 to 50 cm in the current year, and the ground diameter is 0.4 to 0.5 cm. Use 23-year-old seedlings for the upper pot. Use a 50-60 cm round pot or planting trough. The pot soil is prepared with 6 parts of leaf mold soil, 2 parts of manure and 2 parts of sand. Adjust the pH to 5-6. After planting, cut the top 40 to 60 centimeters above the ground. Use the leaves 6 years ago and start bearing fruit after 7 to 8 years. They bloom twice a year. The first flower blooms from February to March, and the fruits are harvested from August to September. The fruits are large. Hao is the genuine product, also known as big fruit and big red fruit, accounting for 80-90% of the annual output; it blooms for the second time from August to September, and the fruit is picked from March to April of the following year. It is called four-season fruit, flower red, horn red, and the fruit is small and quality. Poor, accounting for 10-20% of the output, it is a defective product. After the fruit is harvested, soak it in boiling water until it turns red and then dry it in the sun. The dry fruit rate is 25-30%.