Such trees are around 20m high, the trunk diameter of 70cm and 300-350 years old. It's bark is dark red or almost black, with white spots above the clouds. The leaves are oval. Iron birch is the world's most hard wood, is used as a substitute for metal. The Soviet Union had used it to manufacture bearing in the speedboat. Because of the tight texture, it sank when been into the water. Even if it immersion in water a long term, its inside can still remain dry.
The Top of Plants
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peas The oldest crops ：
Peas have more than 11000 years of history, which is the world's oldest crops. Pea is native to southern Europe, the Mediterranean and West Asia, It is a kind of climbing plant. Our country began planting the peas from the Han Dynasty.
The most sensitive tree to fire:Fire extinguishing tree
Scientific name: Lithocarpus glabra Rehd(樟柯树、梓柯树) Distribution :Still at the Africa As long as there are people who light a fire under the tree, it will immediately emits a special liquid and put out it. Proverb: Houses with Fire extinguishing tree, we will not afraid of fire.(盖 房要用梓柯树，不怕火灾安心 住)
In the endless life, its two leaves abrasion on sand ground, But the basal leaves are constantly growing, to supply the leaf ‘s margin loss. Some "elderly" ,have experienced years of wind and frost, the leaf often been torn into many narrow strip veins parallel tendons which like a climb giant octopus on the beach looking far away. The plant mostly grow in Angola and Namibia.
The hardest tree: Iron Birch（铁桦树）
How hard is it? We know the iron is hard. But it is double hardness compare with the iron. Birch’s hardness is the champion in all trees. Using bullet to hit it has the same effect plating the thick steel. Where can you find it? If you want to see the tree, let’s go to the northeast or the North Korea s.t.
Why can the tree extinguish a fire?
The scientists found, it’s because it has a natural automatic “fire extinguisher”. Its branches and leaves are dense, and slender blade drag down, about 2.5 meters long, with a lot of ball whose size is equal steamed bread hidden in. It looks like fruit, but in fact it is the fire “weapon” – section(节苞). The section have many small holes on it, filled with white and transparent liquid, after the analysis scientists found, these liquid contains a lot of carbon tetrachloride, which let the fire go out.
The biggest plant:General Sherman Tree(雪曼将 军树)
There is a vast expanse of forest in the western slope of the Sierra Nevada in California,this piece of vast woodlands make up by the giant sequoias,is known as the "giant sequoias Empire". 100 years ago, the giant trees was found.Due to its particular leaves, it is called the "the mammoth tree" or "California Song".
Why does it gives out light?
In fact, the tree itself is not luminous, but a kind of fungi parasitic on it, Armillariella tabescens (假 蜜环菌) make it. The fungus growth and reproduce by absorbing and decomposing the tree’s cellulose and lignin. At night, they emits baby blue light.
2013-4-26
Main parameters Age Height above the bottom Ground circumference 3200 years 83.8 m 31.3 m
The maximum diameter of the bottom
Average crown width
The brightest tree : Magic Tree
How about see a book without light at night? Yes, you can.
In Africa’s(or North America) primeval forest, glowed a luminous tree. During the daytime, this tree looks have no different with general ones. But, at night, its trunk and branches are shining fluorescent light, under which you can see 5 small size of script word.
If poisoned, you will dead after 20 minutes to 2 hours. Use the red back bamboo grass( 红背竹竿草) quickly, only this can solve the poison.
Height: Up to 30m
The most poisonous tree: Antiaris toxicaria(箭毒木or见血封喉)
Antiaris toxicaria’s milky sap containing highly toxic. Upon contact with the human and animal wound, it can cause the poison heart attack vascular closure, blood coagulation, and choked to death. It is reported that the beast who was shot would dead as the uphill road run seven steps, the downhill road run eight steps, the campaign run nine steps. It is known as the “an unsettled state of mind and nine not to live ”by the indigene.
11.1 m
32.5 m
Trunk estimated volume
Trunk estimated weight
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