What are the extinct trees? What are the extinct plants

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

Among them, the Chinese pigeon tree, also known as the dove 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. Because of the high mountains and rivers in our country, it has become a natural refuge for various animals and plants, and it is one of the ancient plants that survived in the remote mountainous areas of the central and western parts of our country, and botanists call it the pearl in the forest sea, the living fossil of plants and the green panda.

The reed tree is a deciduous tree, and the bark falls off in irregular flakes. Leaves solithin, alternate, clustered on short branches, leaves papery, broadly ovate or nearly heart-shaped, apex acute, base heart-shaped, margins coarsely serrate, petioles 4.5 cm long, flowers heterogeneous, apical inflorescence composed of many male flowers and one bisexual flower.

Causes of the extinction of plants and animals

1. Asteroid impact.

This is the first thing most people associate with the word "extinction", and it is not for nothing that some experts believe that 65 million years ago, a meteor hit the Yucatán Peninsula in Mexico, causing the extinction of the dinosaurs.

2. Climate change.

Even without a major impact from an asteroid or comet, climate change, which could lower global temperatures by 20 or 30 degrees Fahrenheit, poses a constant danger to terrestrial animals. You only have to look at the last ice age, about 11,000 years ago, when various large animal mammals were unable to adapt to rapidly warming temperatures, and they also succumbed to a lack of food and predation by early humans.

3. Disease. While it is unusual to eradicate a particular species with disease alone, the foundation must first be laid through starvation, habitat loss, or lack of genetic diversity, and the introduction of a particularly deadly virus or bacterium at the wrong time can wreak havoc.

What are the sheep's ear garlic: Deforestation has caused the extinction of the orchid family.

Marsh orchid: Wetland development has led to the extinction of the orchidaceae plant.

Orchid: Horticultural collection has led to the extinction of the orchidaceae.

Codonopsis and Silk Grass: The extermination of these two wild plants caused by the excavation of medicinal herbs is Fern, Rainey fern, ancient fern, brown fern, seed fern, Helena olive, Baishanzu fir, Mandala, etc

Silkworm, Fern, Rainey Fern, Ancient Fern, Seed Fern, Bennecycad, Gymnofern, Rhizome.

Sheep's ear garlic: Deforestation has led to the extinction of the orchid family.

Marsh orchid: Wetland development has led to the extinction of the orchidaceae plant.

Orchid: Horticultural collection has led to the extinction of the orchidaceae.

Codonopsis and Silkgrass: The excavation of medicinal herbs caused the extinction of these two wild plants.

Acer family Acer genus.

Deciduous tree, 15 meters high. It is only distributed in the narrow range of West Tianmu Mountain in Zhejiang, and only two plants are found in the outer bend of West Tianmu Mountain, and the growth has declined. Seeds have a high rate of infertility and a weak ability to renew naturally. It is in danger of extinction.

Leguminaceae honey locust genus.

Endangered species. Deciduous tree, 15-20 m high. There were originally 5 old trees in Hunan, and now only 2 remain. The natural regeneration ability is very weak, and the seedling formation rate of artificially propagated seeds is low.

Acer yangjuechi is only distributed in a narrow range of West Tianmu Mountain, Zhejiang, and its number is very small, and its growth has declined. The plant has a high infertility rate and weak natural regeneration ability, and has fallen into the danger of extinction, and is listed as a national second-class protected plant.

A. genus A. spinulaceae.

The stem is generally 10-20 cm in diameter, 1-meter high, and some can reach more than 10 meters. Nowadays, it is only distributed in Guizhou, Sichuan, Guangdong and other places in China, and is a rare and endangered protected plant in China.

Honey locust fluff. When it comes to the endangered status of plant species, there is no more danger than the honey locust fluff. According to the survey, there were 5 old trees of this species in Nanyue Mountain, Hunan, and only 2 of them remain. The wood of this tree is dense, the pods can be used as detergents, and the plant has garden ornamental value.

This species is a primitive species in the legume family, which is of great significance for the study of taxonomic system. In view of the above situation, this species is designated as a national first-class protected plant.

Acacia fluffy is a deciduous tree with a height of 15-20 meters. The trunk and branches are covered with thick, branched woody thorns. The leaves are often clustered at the top of the branches, with an even number of pinnate compound leaves, with 10-16 leaflets. leaflets oblong-ovate, long centimeters, centimeters wide, nearly basal leaflets acute;

There are too many in the world, just talk about our country's:

1 plant of Putuo hornbeam.

2 strains of honey locust.

3 plants of Guangxi Huotong.

3 fir trees.

4 strains of maple spp.

5 plants of Tenmu ironwood.

6 canopy trees.

6 strains of Yunnan tung.

10 knee-shanked trees.

According to the relevant 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, Hainan black-crested gibbons and Hainan black bears have been greatly reduced, rare plants such as Wangtian tree and dipterocarp are endangered, elephants and peacock pheasants have been greatly reduced, and more than 20 kinds of precious and rare animals such as elk, wild horses and Xinjiang tigers have been or are basically extinct. Preliminary statistics also show that more than 300 species of terrestrial vertebrates, about 410 species and 13 types of wild plants are endangered in China.

The person in charge said that among the 640 world's 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 its total. Experts estimate that by 2010, 3,000 to 4,000 species of plants will be endangered in China. 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.

The report, published by the World Resources Conservation Union (IUCN), is the most detailed assessment of plants and animals facing extinction, compiled from 7,000 volunteer experts from around the world. About 1 species or 24% of the mammals that live on Earth today are endangered, the report says. In addition, 12 per cent of birds, 1 4 reptiles, 1 5 per cent of amphibians and 30 per cent of fish are threatened with extinction.

According to the report, the main countries involved are Indonesia, India, Brazil and China. The United States is listed as the number one endangered country for fish and invertebrates, and Malaysia is listed as the most important endangered country for plant species. Since only 4% of the world's known plant species are assessed, the actual number of endangered plants is much higher than the published figures.

The situation is worse than scientists expected.

Burrakit, who is also the director of the Canadian Wildlife Centre, said that in the first decade of the 21st century, many species, including primates, experienced significant declines. He said it was unclear which endangered species were essential to keeping humanity alive.

Experts believe that the main reason for the accelerated extinction of species is the human factor. The growing size of cities, the large-scale deforestation of forests, and the rapid development of agriculture, animal husbandry and fisheries have all caused serious damage to biodiversity. Without greater global support, engagement and funding for nature conservation, many amazing creatures could become extinct in the first few decades of this century, and stopping this trend would require at least 10 times more investment than it does now.

Tell one of them, unique to China, Baishan Zulengshan, there are only 3 in the world, and the others are found by themselves, and there are a lot of one-leaved grasses.

Sheep's ear garlic: Deforestation has led to the extinction of the orchid family.

Marsh Orchid: Wetland development caused Benlan.

Plants of the family are extinct.

Orchid: Horticultural collection has led to the extinction of the orchidaceae.

Codonopsis and Silk Grass: The extermination of these two wild plants caused by the excavation of medicinal herbs is Fern, Rainey fern, ancient fern, brown fern, seed fern, Helena olive, Baishanzu fir, Mandala, etc

This is a pseudo-question. Species are always in flux and in constant extinction. It has been about 3 billion years since the birth of algae plants, and many new species have been born and many species have become extinct.

For higher plants, Quaternary glaciers are the time period when extinct species are concentrated.

The epiphany blooms at 9 o'clock. Long extinct.

The Rwandan water lily was almost extinct.