Alsophylla, also known as tree fern, can reach a height of 8 meters and belongs to the fern family. Most of the existing ferns are dwarf herbaceous plants, and only a few survived the changes in the continent. One of them is the fern plant. It is the only woody fern left today. It is extremely precious and is classified as a fern. A national first-class protected plant.

Alpinia alba prefers a warm and humid climate. It is distributed in Yunnan, Guizhou, Sichuan, Tibet, Guangxi, Guangdong, Taiwan and other places in my country. It often grows in moist places such as under forests or riversides. From the appearance, it looks like a coconut tree. Its trunk is cylindrical, upright and tall. There are many large and long pinnate leaves on the top of the tree. If you turn its leaves over, you can see many stars on the back. A group of dotted sporangia containing many spores. It has no flowers, fruits and seeds; it relies on spores to reproduce.

The spores of ferns are different from the seeds of common plants. They cannot take root and germinate and grow into new plants if they fall on suitable soil. Instead, it first sprouts and grows into a heart-shaped sheet called a prothallus. The protothallus is green, with rhizoids growing underneath, and can live independently. Usually, there are cervical egg apparatus and sperm apparatus on the prothallus. When the sperm organ matures, the sperm can swim in the water or combine with the egg cell in the egg organ to form a zygote. The zygote will continue to absorb nutrients from the prothallus and continue to develop to form a new cynoderma plant.

The tall tree has a beautiful body and is a good garden ornamental tree. Cypress also has great medicinal value. The stems of C. alba are rich in starch. In addition to being edible or used to make vases and other utensils, they can also be used as medicine. In traditional Chinese medicine, they are called dragon bone wind. It is slightly poisonous and can dispel rheumatism, strengthen muscles and bones, clear away heat and relieve cough.