Apex with or without glandular points. Inflorescence droops and leaves often open first; Male inflorescence opens earlier than female inflorescence; Bract apex acute or dehiscent, membranous, caducous, disk tilted cup-shaped; Male flowers have many stamens, inserted in the disk, dark red anthers, short filaments, free; Ovary with short style and dehiscent stigma. The capsule burst. The seeds are small and numerous, and the cotyledons are oval.
Extended data:
growing environment
Poplar is a forest tree species scattered in temperate and cold temperate zones in the northern hemisphere. In China, it is distributed between 25 ~53 degrees north latitude and 80 ~ 134 degrees east longitude, that is, it is distributed in central China, north China, northwest China and northeast China. The rest of the world is generally distributed in the range of 30 degrees to 72 degrees north latitude.
Poplar (Latin name: Populus L.) belongs to the genus Populus, with about 65,438+000 species. There are about 62 species (including 6 hybrids) in China, of which 57 species are distributed in China and about 4 species are introduced and cultivated. In addition, there are many varieties, variants and introduced strains.
The classification system of Populus is divided into five schools: Takamahaka School, Poplar School, Black Poplar School, Turanga School and Poplar School. Trunk usually ends straight; Bark is smooth or longitudinally dehiscent, usually grayish white. Mainly distributed in Central China, North China, Northwest China, Northeast China and other vast areas.
Main value
The industrial utilization of poplar mainly includes: large-diameter poplar is mainly used to produce plywood, laminated veneer lumber and furniture; Small-diameter poplar is used to produce fiberboard, particleboard, paper making and matches.
Generally, large plant spacing is used for planting. In developing countries, close planting is the main method, and the rotation period is short, producing medium-diameter wood for civilian use. There are some transitional types between the two.
Poplar can be widely used in ecological protection forest, three-north protection forest, agriculture and forestry protection forest and industrial timber forest. Poplar is an excellent tree species for road greening and landscape. Its characteristics are tall and majestic, neatly marked, fast forest formation, sandstorm prevention and waste gas absorption.
plant culture
literature
Xiao Baiyang was written by Liang Shangquan and composed by Shi Xin. Yan Weiwen first sang in 1984 Spring Festival Evening.
Other Literature: Hu Yangshu and Praise of Poplar.
romaunt
Magpie and poplar
During the Yongle period of the Ming Dynasty, Huang's father and son left Peixian County, Jiangsu Province with tears in their eyes, and moved to Lubei Plain, where they settled on the east bank of the Siniumiao River. Plant a small poplar around the bay pit in front of the door. They grew wildly with joy, and the slender and weak tree in the middle lost at the starting line, unable to catch up with each other step by step.
People can live under people, but trees can't grow under trees. Poor little poplar can only grow slowly by a little sunshine scattered in the dense branches and leaves of big trees. In a few years, the poplars next to it became useful, making the skinny poplars jealous.
Misfortune is a blessing, joy is a worry, and it is excellent. The Huang family expanded their house by adding more people. The required wood is searched in the forest, and it is dug from the beam to the purlin in turn. Poplar trees were cut down one by one and turned into furniture purlins in the hands of carpenters. When the young poplar saw the sunshine, it shook its body, grew thick and tall, and finally a nest of magpies flew to settle down.
Little poplar is full of joy and pride, and worries come from it. I survived because of my weakness. Seeing that there are fewer trees bigger than myself every day, bad luck will befall me and I will be unhappy all day. The magpies are also worried about the "violent demolition" they will face. They are in the same boat and appreciate each other, so let's chat and plan together.
Mother Magpie said that I have been to many places and found that people don't cut down locust trees easily. Poplar said that the locust tree had a good life and took a scary name when it was born. Locusts and wooden ghosts also say that if they grow thick, they can become immortals. For the sake of health, people dare not provoke. Sophora japonica grows slowly and is not easy to become a useful tree. Our life is cheap, and our name is cheap. It is easy to grow up and become a useful person. People will kill us easily without thinking or scruples.
It's not as good as those jujube pears, which are full of thorns and can't be made into materials, but they are safe. Father Magpie flew all over the north and south, and he was well informed. He said, be content, old Yang Jie. Look at nanmu sandalwood and Huang Huali wood, which is not more expensive than you? Almost completely cut down by humans. Haven't you heard that "musk deer dies first, and silkworm dies early because of silk"? Let's stop complaining, it's no use complaining.
Folk story: Poplar will ascend to heaven without moths.
Lv Si has a dutiful son. Every time he goes out, he wants to buy something to take to his mother.
His filial piety touched two immortals: Lv Dongbin and Han Zhongli. These two immortals opened a biscuit shop in Lvsi Street, and the biscuits they sold were very strange. There is a big bowl in San Qian, and many people have bought it. He baked it when he sold it, and people who eat morning tea come to buy it every day. There are also two sesame cakes only the size of copper coins. How much are they? Five yuan each.
Someone asked, "well, your big sesame seed cake only costs three yuan, but how come the small one costs five yuan?" Two immortals reported to him, "That's it, don't buy it." He has a truth: it is not too expensive to buy for the elderly; Buy it for palmers and I won't sell it to you! In this way, three times today, four times in the Ming Dynasty, two small baked wheat cakes can't be sold, and they are all hairy standing there.
One day, the dutiful son passed by and wanted to buy sesame cakes. He asked, "Boss, how much are the biscuits?" ? "
"The big one costs three dollars, and the small one costs five dollars."
"I bought two expensive ones for my mother."
The two immortals knew that the dutiful son had come. There is an elixir in those two biscuits. If you keep giving it to his mother, you will become immortal standing there. Just say, "Your mother is old, just bring one. Eat by yourself and buy three yuan each. "
The dutiful son thought about it, but I didn't eat it either, so I bought an expensive one and gave it to my mother. He paid five yuan, picked up the baked wheat cake and put it in his arms. This is a terrible thing. The sesame seed cake in the cotton-padded jacket is too hot, and my chest is burning, as if it were going to be cooked. Where is this miracle? I saw the boss holding a poker and biscuits in the stove, but it was very hot and the hair on it was gone. Why is it so hot?
He took out the sesame seed cake. Oh, this sugar is dripping from his fingers and claws. His hands are too hot. Alas, it burns your chest and hands in your arms. If you put it away, your mother will have nothing to eat. How can you make a picture? At this time, he found that the sugar was burning people. He saw a poplar tree beside the ditch with a walnut scar on its bark, which could be used for wiping.
He ran over and squeezed the sugar out of the sesame cake and spread it all on the poplar. Now that the sesame cake is not hot, he brought it back and told his mother to eat it while it was hot. The old man has a heart attack and is very relaxed. After eating this, all the diseases disappeared and her spirit was shaken. She said, "Son, this is the elixir of life. I feel much better after eating. " In fact, those sweets are the real elixir. She didn't eat them.
Let's talk about poplars again. When they reached the elixir of life, they fled upward in the wind until they reached the sky. Taibai Venus is standing in the worse gate, huh? How did poplars grow into the sky? Oh! I know, Han Zhongli, Lv Dongbin's mother, spent her filial son in Lvsi Street, but the elixir of life was eaten by poplars. Poplar will become immortal after a long time and will last forever. We must find a way to do this.
There are trees in the sky, too Are there no trees on the moon? He got a willow cow from a tree, sharpened it on a poplar and sharpened his eyes. Oh, wow, the juice came out, and the poplar slowly shrank and stopped growing. This eye is at the foot of the head, and the poplar head hangs down and dies. Since then, poplars have fallen to the ground and sprouted branches, which are not straight.
So we have a saying here: "Poplars don't rot, support the sky, and then someone rot!" " "
References:
Baidu encyclopedia-poplar