The natural calendar of Tianfu 丨 The "King of Shancai" that witnessed the changes of the earth for hundreds of millions of years (July 29, 2022)

In the valley, beside the river pond, beside rocks, fern can often be seen. They are clustered together, seemingly ordinary, but they are one of the oldest creatures on the planet.

They coexisted with dinosaurs and witnessed the changes in the earth's hundreds of millions of years.

Why can ferns survive in the natural evolution of hundreds of millions of years?

This is related to its breeding method. The method of breeding is similar to moss, and the spores are used to reproduce offspring. A large fern plant can produce hundreds of millions of spores within a season, and there is a spores. In a dry environment, the mature spore sac is cracked, the spores are released, and the spores walk away with the wind, and when it is landing to a suitable position, it will germinate. And their vitality is very tenacious, even on the rock walls where nutrition and soil are severely lacked, they can grow continuously.

Today, ferns have evolved into various shapes and are widely distributed around the world. There are many types, about 12,000. In China, my country is known as the "fern kingdom". It has a 61 family of 223 genus and about 2600 types of ferns living in the territory. Some of them are very tall, such as 桫椤, up to ten meters high; some are small, similar to moss, such as Tuan ferns, only 5 mm tall. There are also very low reproductive capabilities and very rare. For example, the jade dragon fern, mainly distributed in the altitude of 3700-3800 meters of high mountain rock gaps, is a national first -class protection of wild plants. Therefore, when you see ferns in the wild, do not excavate casually, it is likely that it is the national key protection plant.

Many ferns are still a delicious ingredients, which have the fragrance of wild vegetables and rich nutrition. They are known as the "king of mountain vegetables". There are also many practices. It can be cooled, and can be burned, stir -fry, stew, steamed, etc. with meat or other vegetables. In "Materia Medica Pickling", it is recorded: "Fern, leaves like old fern, roots like purple grass. Shengshan, people make Ru food."

Huang Tingjian's "Spring and Yin" in the Song Dynasty described: "Bamboo shoots are newly born with yellow calves, and fern buds are long -fist. Try to find wild vegetable spring meals, which is February of Jiangnan." Such as children's fist, at this time, the bracken is very crispy and delicious, and the nutritional value is high. When the leaves are liberalized and the stems grow old, they will not be eaten anymore.