Seek extinct plants in China, extinct plant species in the world

Due to the scarcity of forest resources and the destruction of wild animal and plant habitats, many rare animals and plants in China are endangered. According to preliminary statistics, 15 to 20 percent of China's animal and plant species are endangered. According to a person in charge of the State Forestry Administration, nearly 200 endemic species have disappeared in China, and some are on the verge of extinction.

For example, the Hainan black-crested gibbon and the Hainan black bear have been greatly reduced, and rare plants such as Wangtian tree and dipterocarp are endangered; Wild animals such as elephants and peacock pheasants have been greatly reduced, and more than 20 species of rare animals such as elk, wild horses, and Xinjiang tigers have become or are basically extinct. Preliminary statistics also show that more than 300 species of terrestrial vertebrates, about 410 species and 13 species of wild plants are endangered in China. The person in charge said that among the 640 endangered species listed in the International Convention on Endangered Species of Wild Fauna and Flora, China accounts for 156 species, accounting for about 24% of the total.

Experts estimate that by 2010, between 3,000 and 4,000 plant species in China will be endangered. Because of the interconnectedness and mutual constraints between species, if one plant goes extinct, 10 to 30 other species that depend on that plant will disappear.

What are the extinct animals?

1. Ancient Chinese fruit The "world's earliest flower" that bloomed in western Liaoning region of China 100 million years ago has recently been confirmed to belong to the Li group, the oldest new group of angiosperms so far.

2. Seed fern: extinct gymnosperms. It may have originated from the pregymnosperm recluse, which appeared in the Late Devonian, was extremely prosperous in the Carboniferous Permian, gradually declined in the Mesozoic, and became extinct in the Cretaceous.

3. Bennecycad: ancient plant, an eye of cycads. Directly derived from the myelin seed fern. Some stems are thick and short, covered by the remaining leaf base of the petiole; Some are thin and branched, with a smooth surface, and live from the Triassic to the Oligocene.

4. Reedwood: Reed is an ancient plant, belonging to the class of Equisetum officinalis, with linear or lanceolate leaves, with a single vein, and the rears are born on the node. There is a large pith in the middle of the stem. Lived from the Early Carboniferous to the Late Permian.

5. Star wood: Star tree may be the most primitive lycopodium plant. About meters high.

The rhizome part and its pseudoroots or roots that protrude downwards are bifid branches, and the upward growth develops into dedicated aerial stems, and the bifurcated lateral branches grow around the stems.

The extinct plants include Chinese pigeon tree, Bennei, cycad, naked fern, reed, seal wood, scale wood, and Lenny fern.

The Chinese pigeon tree, also known as the pear and pigeon tree, is a deciduous tree. It is a relict plant left over from the Tertiary period of the Cenozoic Era 10 million years ago, and during the Quaternary glacial period, most of the dove trees in most areas were extinct one after another. Due to the large mountains and rivers in our country, it has become a natural refuge for various animals and plants, and it is one of the ancient plant eggplant bumps that have survived in the remote mountainous areas of the central and western parts of our country, and botanists call it the pearl in the forest, the living fossil of the plant and the green panda.

Cycad, the name of Chinese herbal medicine. This product is cycad cycad cycad cycansrevolutathunb, which is used as a medicine for leaves, roots, flowers and seeds. Roots and leaves can be picked in four seasons, flowers can be picked in summer, seeds can be picked in autumn and winter, and dried.

The main indications of the tremor function are: leaves: astringent hemostasis, detoxification and pain relief.

It is used for all kinds of bleeding, gastritis, gastric ulcer, hypertension, neuralgia, amenorrhea, cancer.