Put a bunch of plants at the door during the Dragon Boat Festival. What kind of plants are they? How did this custom come about?

Acorus calamus is a perennial herb. Most of them are wild, but they are also suitable for planting in the green space next to the house. Compendium of Materia Medica says that Acorus calamus is a "prosperous person". "Lu Chunqiu? Ren Di said, "Chang Zhe is the king of a hundred herbs". Folklore believes that the flowers of Acorus calamus are expensive and their taste makes people live longer. In ancient China, Acorus calamus was regarded as the rebirth of stars. " "Spring and Autumn Movement Pivot" says: "Yuxing is scattered into calamus". Legend has it that cattail flowers are loved by people. According to ""records, Emperor Mao's empress Zhang "was drinking tea indoors when she suddenly saw the calamus in full bloom in front of the court, which was not owned by the world. After that, she said to the waiter in surprise,' Did you see it?' I didn't see the clouds. Later, he said,' It's expensive to taste the flowers of calamus'. Because of its food, it gave birth to a great ancestor. "With this myth, legend and record, Acorus calamus is widely used in folk customs and is regarded as an auspicious vegetation to ward off evil spirits. Acorus calamus has medicinal value. " "Herbal Classic" said: "Acorus calamus is mainly used to treat arthralgia due to wind-cold-dampness, cough and asthma, relax pores, tonify five internal organs, clear eyes and ears, and make sounds. Long-term service is in harmony with intellectuals, and they will not forget and be fascinated, thus prolonging life. Good for the soul, high intelligence is not old. " "Collected Taoist scriptures? "Acorus calamus Sutra" says: "Acorus calamus is the essence of aquatic plants and the elixir of the gods." "Its medicine with five virtues and five elements, Julia, safflower, white festival, yellow heart and black root. It can treat all kinds of wind, stubborn joint pain of hands and feet ... strengthen bone marrow, prolong spirit, moisten five internal organs, benefit six internal organs, stimulate appetite and blood vessels, benefit mouth and teeth, clear eyes and ears, soothe skin and eliminate cold and heat ... ".

Folium Artemisiae Argyi and Acorus calamus:

In ancient times, there was a custom of hanging wormwood and calamus in front of the door. Artemisia argyi is a perennial herb. Acorus calamus is a perennial aquatic herb. Both can be used in traditional Chinese medicine. Folium Artemisiae Argyi can be used to make moxibustion strips, which is an indispensable item in acupuncture therapy of traditional Chinese medicine. Burning moxa sticks can treat many diseases with moxibustion. Both Artemisia argyi and Acorus calamus contain aromatic oil, so they can be used as pesticides to kill pests and diseases. During the Dragon Boat Festival, the summer solstice approaches, the weather turns hot, the air is humid, mosquitoes breed and epidemics increase. Ancient people lacked scientific concepts and mistakenly thought that all diseases were caused by ghosts and evil spirits. Therefore, Artemisia argyi and Acorus calamus were tied into human shapes and hung in front of the door in the early days of the festival to drive away ghosts and evil and keep healthy. In fact, it is the fragrance of these two kinds of grass that really purifies the environment and repels the plague. In southern China, people are used to drinking calamus wine during the Dragon Boat Festival, so its medicinal effect is more direct. Usually, Acorus calamus is chopped before the festival, mixed with realgar, soaked in wine, and can be drunk on holidays.

In the Northern and Southern Dynasties, the Dragon Boat Festival was also called "Orchid Bath Festival", and Jingchu had the custom of picking Ai. Ai picking should start before the cock crows. Choose the most humanoid wormwood to take back and hang on the door, or use it for acupuncture. It is said that this kind of wormwood has special curative effect in acupuncture. Most people tie wormwood into the shape of a tiger, or cut it into the shape of a tiger, and then stick wormwood leaves on it to wear during the Dragon Boat Festival. Besides picking mugwort, we also picked calamus to soak in wine.