"Western fern", scientific name Pteridium aquilinum (linnai) Kuhn subsp. aquilinum, is a large perennial herbaceous fern of the genus fern (Pteridium) of the fern family (Pteridophyta), the true fern class (Filicopsida), the fern family (Filicales), the fern family (Pteridiaceae). It is one of the most common wild ferns in temperate to subtropical regions of the northern hemisphere, with both ecological value and toxicity risk, and carries historical literature.

Cyclosorus interruptus (Willd.) H. Ito is a perennial herbaceous plant of the genus Cyclosorus in the family Araceae. The rhizome is long and transverse, with gray white long hair and brown scales at the top; Leaves sparse, with black brown base, ovate lanceolate or oblong lanceolate; The lateral central feather is nearly linear lanceolate, with triangular lobes; The leaf veins are clearly visible below, the leaves are almost leathery, and the sporangia are located in the middle of the lateral veins. There are sterile zones on both sides of the feather axis; The cap of the cyst is sparsely covered with soft hairs, light brown in color, and disappears into the cyst when mature.

Dryopteris filix mas (L.) Schott is a plant species belonging to the family Dryopteridaceae and the genus Dryopteris. The plant is about 50-120 centimeters tall. Produced in the northwest and north of Xinjiang, distributed in Europe, North America, Central Asia, and the northern temperate zone. Growing in coniferous forests or by small rivers at an altitude of 1500-1900 meters, it is distributed in groups. The medicinal use of ferns has a long history in China, such as Guanzhong, which had been used as a medicinal plant for over 2000 years and had insecticidal effects; After liberation, with the continuous development of medical research in our country, a large number of valuable medical discoveries have been made.

Dryopteris filix mas (L.) Schott is a plant species belonging to the family Dryopteridaceae and the genus Dryopteris. The plant is about 50-120 centimeters tall. Produced in the northwest and north of Xinjiang, distributed in Europe, North America, Central Asia, and the northern temperate zone. Growing in coniferous forests or by small rivers at an altitude of 1500-1900 meters, it is distributed in groups. The medicinal use of ferns has a long history in China, such as Guanzhong, which had been used as a medicinal plant for over 2000 years and had insecticidal effects; After liberation, with the continuous development of medical research in our country, a large number of valuable medical discoveries have been made.

Polypodia vulgaris L. and Polypodia virginianum L. are the rhizomes of water dragon orthopedic plants. The multi legged fern is distributed in the northeastern part of Xinjiang, China. The Northeast multi legged fern is distributed in Northeast China, North China, and other areas. It has the effect of clearing heat, removing dampness, and detoxifying. Commonly used for damp heat gonorrhea, rheumatoid arthritis, boils, abscesses, rubella itching, and traumatic injuries.

Polypodia vulgaris L. and Polypodia virginianum L. are the rhizomes of water dragon orthopedic plants. The multi legged fern is distributed in the northeastern part of Xinjiang, China. The Northeast multi legged fern is distributed in Northeast China, North China, and other areas. It has the effect of clearing heat, removing dampness, and detoxifying. Commonly used for damp heat gonorrhea, rheumatoid arthritis, boils, abscesses, rubella itching, and traumatic injuries.

Hypolepis Bernh is a genus in the family Hypolepidae, consisting of approximately 50 species of plants. It is a pan tropical plant, with a greater presence in the tropical regions of the New World, extending southward to South Africa and northward to Japan. The Flora of China records that there are currently 8 species in China, mainly found in tropical and subtropical regions.

The East China Dryopteris is a plant of the genus Dryopteris in the family Cyperaceae, with short and upright rhizomes and thicker fleshy roots; The total petiole is short, the leaf blade is slightly pentagonal, gradually pointed, and three lobed; Feathers are opposite or nearly opposite, slanting out, closely attached to each other, with handles, and each pair on top has no handles. The base has the largest pair, slightly forming an equilateral wide triangle; The leaves are made of grass and turn green after drying. The veins are distinct and extend straight to the serrations. The East China Dryopteris is distributed in Anhui, Jiangsu, Jiangxi, Guizhou, Fujian and other places in China. Habitat: grows under forests, beside shrubs, and in damp and shady areas along roadsides.