Observe the plants at home and write a composition.

1. Write an essay on observing plants in 300 words. There are several mimosa plants on the lawn in our community. I pay special attention to them because they are different and arouse my curiosity.

In spring, the mimosa sprouts, green, and the pole is only 1 to 2 decimeters long. In summer, mimosa is luxuriant in foliage and leaves are very strange. It is a very thin stem, and there are some fine things like small needles on both sides, much like the leaves of Metasequoia glyptostroboides. In autumn, mimosa blooms, and small flowers are fluffy, pink and purple. Although it is small and unremarkable, when you look closely, you will find it beautiful and lovely. This is a delicate beauty, very charming. In late autumn and early winter, mimosa will bear fruit, just like lentils, with a green shell outside and seeds inside. After a while, the shell turns brown. Soon, the seeds jumped out of the shell and landed on the soil. When it takes root and sprouts next spring, it will reproduce from generation to generation, and its interest rate is no different from other plants. What makes people wonder is why the leaves droop and close when they touch it. I was puzzled, so I had to look for information on the Internet.

It turns out that mimosa once lived in the desert, and tornadoes often appeared in the desert. When the sand rolled up by the wind touched the leaves of mimosa, mimosa felt very painful and the leaves closed. In the long run, it will become grass that closes as soon as it touches leaves. There is a pouch for storing liquid on the stem of the petiole of mimosa, just like an oil cylinder in a hydraulic press. Usually, the bag is full of liquid. When you touch the leaves, the liquid in the bag flows to the upper and both sides of the leaves, and the leaves close under the action of gravity. Calm down for a while, the liquid slowly flows back into the bag from both sides, and the leaves spread out again.

Sometimes, I touch them on purpose and make fun of them.

My cactus has a flat stem with many thorns on it. I once heard the teacher say that cactus has adapted to the desert climate, its leaves have turned into thorns, its stems have become fat and fleshy, and it has grown a lot of hair. Its stem is enlarged because it needs to store nutrients in rainy season and reduce water evaporation in dry season. I was shocked by its "survival of the fittest".

However, what shocked me even more was an incident that happened in the summer vacation.

I remember that during the summer vacation, my cousin, four years older than me, came to visit, and somehow a sore grew on his foot, which made him cry and scream, which can be said to be fidgeting. Later, my mother didn't know which book to find a remedy: cut cactus into pieces, mash it and apply it to the sore. I cried as soon as I heard it. "Want to cut my baby? No! " My mother and my brother prepared for a long time before I promised them to cut a piece. After a few days, the sore on my cousin's foot really disappeared. I thought, "This method is clever, but my cactus is definitely going to die." A few days later, the "wound" of cactus slowly dried up and healed, leaving only a white scar. At this time, I can't help but respect cactus.

2. Observe the plant composition. Plum blossoms are about 5- 10 meters high, with brownish purple stems and many longitudinal stripes.

Branchlets are green. Leaf blade broadly ovate to ovate, margin serrate.

65438+ 0~2 flowers per node, sessile or short-stalked, the original species is pale pink or white, and the cultivated varieties are purple, red and colored spots to yellowish colors, which bloom in early spring. Plum blossoms can be divided into departments, classes and types.

Such as real plum, apricot, cherry plum, etc. Plum blossom is a small deciduous tree, with grayish brown trunk, slender green hairless branchlets, oval or round leaves, fine teeth on the leaf margin, and flower buds planted in the axils of long branches, with 1~2 flowers per node, fragrant, 5 petals, white to water red, double petals.

Castanopsis fissa is a small deciduous tree with a height of 10 m. Its branches are usually prickly and its crown is not round. Branches are brownish purple, with multiple longitudinal lines, and branchlets are green or with green as the background color, without hair.

Drupe is nearly spherical, grooved, about 1~3 cm in diameter, densely pubescent, acid green, yellow or yellow-green when the fruit matures from April to June, and some varieties are red-green. Acid, edible, can be used to make dried plums, plum sauce, preserved plums, sour plum soup, plum wine and so on. , and can also be used as medicine. Mei Huajiu is very popular in Japan and South Korea.

It tastes sweet and has the effect of smoothing qi, so it is an excellent fruit wine. Plum is a very popular food in China.

Plums are made by pickling plums with sugar, salt and licorice and then drying them in the sun. Plums can also be used to make bitter or sweet and other foods.

There are more than 300 varieties of plum blossoms. Plum varieties suitable for viewing include Dahongmei, Taigemei, Zhao, Green Sepals and Longyoumei.

Most ornamental plum blossoms are white, pink, red, purple and light green. 65438+February in Southwest China to 65438+1October in the following year, February-March in Central China and March-April in North China.

4~7 days from initial flowering to full flowering, and the last flowering 15~20 days. Plum blossom can be divided into true plum blossom series, apricot plum blossom series and cherry plum blossom series. 65438 0 ~ 2 flowers per node, sessile or short peduncle, 65438 0 ~ 3 cm in diameter, bell-shaped calyx tube, pubescent, ovoid lobes; Petals, the original species is pale pink or white, and the cultivated varieties are purple, red, mottled to light yellow; Stamens are numerous, free, densely pilose in atrium, rarely 2-5 (centrifugal skin) or absent, superior in atrium, long style.

Plum blossom is a long-lived flower, even if it is potted at home, it can often last for more than ten years. There is a plum blossom planted in Jin Dynasty in Huangmei County, Hubei Province, which is still fragrant.

Although plum blossoms have low requirements for soil, it is best to have loose and fertile soil and good drainage. Seedlings can be cultivated in garden soil or humus soil.

Plum blossoms are sensitive to moisture. Although they like moisture, they are afraid of waterlogging. If the basin soil is too wet for a long time, it will lead to deciduous and yellow leaves.

Plum blossoms don't like big fat, so they only need to apply a small amount of thin fat water during the growth period. Plum blossoms can withstand the temperature of-15 degrees.

Prunus mume is mainly propagated by grafting, and sowing, layering and cutting can also be used. Rootstocks are mainly li miao or apricot and peach.

Plum blossom is usually not easy to get sick, but there are also some diseases, such as perforation, anthracnose, powdery mildew, dead branch gummosis, dry rot gummosis and so on. Aphids often harm plum blossoms.

However, dimethoate is not suitable for killing insects, which will cause phytotoxicity to plum blossoms and lead to defoliation. In addition, there is a kind of plum blossom bonsai called plum blossom pile.

Plum blossom mainly contains volatile oil, benzaldehyde, isoeugenol and benzoic acid. Mume mainly contains citric acid and sitosterol, and contains hydrocyanic acid when it matures.

The decoction has inhibitory effect on staphylococcus aureus, Escherichia coli, typhoid fever, paratyphoid fever, dysentery, tuberculosis and other bacteria and dermatophytes, and can reduce the occurrence of anaphylactic shock death in protein of guinea pigs. In addition, plum blossom can extract aromatic oil. According to Zhao Xuemin's Compendium of Materia Medica in Qing Dynasty, "Haicheng people are good at steaming plum and rose dew, which is used as shochu method. A little dew in each pot of wine will be fragrant."

According to the different boiling points of aromatic oil and water, the ancients extracted aromatic oil by fractionation technology and used it as a food additive.

3. Write a composition about observing plants. Last Saturday, my mother took me to a flower shop. When I arrived at the flower shop, there were colorful flowers everywhere, and there were bursts of flowers from time to time. Well done! At this time, my eyes moved to the little mimosa in the corner, which was so small among those tall green plants. I have a strange feeling about it. When I left, I asked my mother to buy a little mimosa.

When I get home, I can't wait to see how shy it really is. Mimosa leaves are green, consisting of dozens of tiny leaves, like a woven shuttle, with a stem connecting the leaves in the middle to string the tiny leaves together. Every branch of mimosa has a small thorn, which will bleed if touched carelessly. Mimosa really looks like a shy girl. I touched it gently, and I will play with it when I have time.

But once, I went to fiddle with the mimosa, only to find that the leaves of the mimosa moved much slower. I kept fiddling with them, and finally the mimosa stopped moving! Is it dead? I was so worried.

I immediately looked through "100,000 Why" and finally found the information and understood the mystery: there was a bag of black beans called leaf pillow under the petiole of mimosa, which contained enough water. When you touch the leaf with your hand, the water in the leaf pillow immediately flows to other places, and the leaf pillow collapses, so the leaf hangs down. When the water in the leaf pillow is used up and it is too late to replenish new water,

Unexpectedly, such interesting knowledge is hidden in a grass. It seems that more observation is needed in daily life!

I like pitcher plants best.

Nepenthes is very special, very different from other plants. Nepenthes grow on the shelf with long and wrinkled leaves. Wearing a green dress, insect traps hanging from the bottom of leaves, like a pig cage, like a small bottle, more like a delicate small hip flask, a bulging belly and a cute little hat. I gently touched the cage and smelled it.

One day, when I was reading an encyclopedia, I suddenly saw a secret hidden in an insect trap! Sweet nectar is constantly oozing from the edge of the bag mouth, which is very attractive. These nectaries are secret weapons for Nepenthes to attract mosquitoes and other pests! Look, mosquitoes may be hungry. As soon as it smells honey, it will fly into the mouth of pitcher plants, so it will stop at the edge of pitcher plants to suck nectar. The edge of Nepenthes is very smooth, and the insects falling on it slide into the insect trap of Nepenthes like a slide. Nepenthes immediately covered its "hat" for fear that mosquitoes would escape. Finally, mosquitoes were "eaten" by Nepenthes. After a few weeks, the poor insects were left with only hard shells. Nepenthes is great!

Nepenthes and I also have stories. Once I went to the botanical garden to observe plants, many mosquitoes rushed at me, and I don't know how much blood I sucked. When I came to Nepenthes, I found a few mosquitoes missing. I didn't know this was the magical effect of Nepenthes until I looked carefully. I really admire this strange plant! I like pitcher plants more and more.

4. A paper on observing plants. Writing 600 words is urgent. The cactus I raised has a flat stem with many thorns on it. I once heard the teacher say that the leaves of cactus have become thorns in order to adapt to the desert climate, and the stems have become fat and fleshy, and a lot of hair has grown. Its stem is very fat, because it wants to store nutrients in rainy season and reduce water evaporation in dry season. I think this is a "survival of the fittest" strain. What shocked me even more was an incident that happened in the summer vacation. I remember that during the summer vacation, my cousin, who is four years older than me, came to visit, and somehow a sore grew on his foot, which made him scream. Later, my mother found a prescription from a book: cut the cactus into pieces, mash it and apply it to the sore. I cried as soon as I heard this. "Want to cut my baby?" No way! "My mother and my brother prepared for a long time to allow them to cut a piece. After a few days, the sore on my cousin's foot really disappeared. I thought, "this method is quite effective, but my cactus is definitely going to die." "After a few days, the" wound "of cactus slowly dried up and healed, leaving only a white scar. At this time, I can't help but respect cactus.

5. Observe how to write the composition of plants.

Xu Jingde of Sichuan Pengshan Qinglong Junior High School

When writing a composition, the teacher will tell us to be good at observation. Some students said that observation is not just watching. Who can't read? What is "good at not being good at"? Actually, observe. The observation required in this composition has a deep connotation!

Let's look at a composition first.

Sample text

narcissus

Zhang Huaiyue, a student in Class 134, Meishan City, Sichuan Province.

On Monday, we came to the classroom early and smelled a faint fragrance before we entered the door.

Ran into the classroom, "wow"-there was a pot of blooming daffodils on the table: green leaves set off yellow and white flowers, as if scattered on the green lake. It's refreshing to stretch your neck and smell its flowers.

Daffodils have roots like garlic, and their leaves are light green, like green garlic seedlings. Its leaves are full and delicate, as if water would flow out at the touch.

Its flower has two layers, the outer layer is white with six petals, and the inner layer is yellow, like a crown made of gold. The flower heart has four stamens, three golden stamens and a white pistil. Stamens guard the pistil, as if loyal servants were surrounded by a beautiful princess.

In a blooming flower, I found a small bud, which was hidden among the flowers like a little girl. Flowers are her big sister, urging her to "open, open!" " ""no, sisters, I haven't slept enough. "Kobanawa bones are coquetry.

I like daffodils! It adds a lot of vitality to our classroom.

The comment on this composition was written by seven-year-old Zhang Huaiyue, a student in Class One, Grade Three, Meishan City, Sichuan Province. In 400 words, the daffodils are vividly written, and a pot of blooming daffodils seems to be in front of us. The composition is successful, and its success is largely due to the observation of the little author.

How does the little author observe it?

First of all, she observed with her eyes, carefully and carefully. Not only did it achieve multi-level, multi-angle and multi-faceted, but also paid attention to the comparison in observation.

The little author first observed the whole from a distance: "A pot of blooming daffodils: green leaves set off yellow and white flowers, as if stars were scattered on a green lake." Then look carefully, observe the roots and leaves: "The roots of daffodils are like garlic, and the leaves are light green, like green garlic seedlings. Its leaves are full and tender, as if they would come out at the touch. " Then, it is closer to some observation flowers: "Its flower has two layers, the outer layer is white with six petals, and the inner layer is yellow, like a crown made of gold." The flower heart has four stamens, three golden stamens and a white pistil. "I also observed a bud hidden in a blooming flower. During the observation, not only the shape and color of stamens were observed, but also the number of stamens was observed. When observing, the author also pays attention to comparison in observation and observation in comparison, so that there is a metaphor that "green leaves set off yellow and white flowers, like stars scattered on a green lake" and "the roots of daffodils are like garlic".

Secondly, the little author also mobilized his nose to participate in the observation. Otherwise, how can there be "sweet" and "cool" sentences? If we observe something with taste and temperature like food, we need to mobilize our nose, tongue and skin to observe it together!

Finally, and most importantly, the little author mobilizes his brain to participate in observation, and observes the scenery with emotional thoughts, which is full of emotion. "Stamens guard the pistil, just like a loyal servant surrounded by a beautiful princess." "It (flower bone bud) is hidden among flowers, like a little girl. Flowers are her big sister, urging her: "Open, open! """No, girls, I haven't slept enough." Small flowers and bones are coquetry. "Such a description, if you don't use emotional observation, obviously does not exist.

It was the successful observation of the little author that brought this successful composition.

The success of this composition tells us that the observation required by the composition is an important part, but the observation required by the composition needs to mobilize the five senses of eyes, ears, nose, tongue and skin to participate with the brain, and it needs to be fully invested.

If you are as observant as a small author, you will also write a successful composition like a small author.

6. Observation Diary Plants write ten articles in a row to observe cacti.

There is a strange plant in my home. Its name is cactus. Do you know how the cactus got its name? To tell you the truth: because it looks like a human palm, people call it cactus!

Cactus is green when it first grows, and its body is covered with many small thorns. Those thorns feel soft. When the breeze blows, the prickles of cactus dance with the wind. How beautiful!

In a short time, the cactus becomes emerald green, which makes people look so dazzling, so comfortable and so fresh. The small soft thorns on its body have also hardened, just like steel needles. After a while, it grew another flower bone. Slowly, it grew bigger and bigger, and finally a big red flower appeared, which looked really beautiful! According to my grandmother, it is not easy for cactus to bloom, because cactus only blooms once in many years.

The appearance of cactus is not very beautiful, but every piece of cactus is a treasure!

7. Observation diary plant 100 word observation-mimosa

My favorite plant is of course mimosa!

Mimosa is produced in tropical South America. In spring, mimosa sprouts, small, green and lovely; In summer,

Mimosa grows bright green leaves; In autumn, the mimosa blooms, pink and furry, like a little hedgehog; In winter, mimosa bears round fruit like soybean seeds. Its characteristic is that as long as you touch its leaves, it will bow its head shyly like a little girl and look sweet.

What a lovely mimosa! He is one of my favorite plants.

Chapter 2: Observation-Seven Stars

Today, I carefully observed seven more stars.

I found that the mouth of Qixingzi is like a sucker, which can absorb plastic products such as plastic pots and plastic bottles.

I fiddled with its body with a small stick, and the seven stars swam quickly under the plastic bottle.

Its body is longer than loach and thicker than loach.

Seven stars have no gills. It breathes through seven small holes on both sides of its body.

The teeth in its mouth are not as small as goldfish or as big as sharks. Its teeth are very strange and grow horizontally.

Today, I have gained a lot. In the future, I will collect some information about Qixingzi and learn about other small animals.

Chapter III: Observation-Evergreen

That day, my grandfather and I came to the yard with 1000 red flowers. We dug many small holes in the ground, buried the seeds in the soil, compacted them with soil and watered them with water. I am just waiting to see how it grows.

Euphorbia peltata is an annual amaranthaceae herb, native to tropical areas. There are often varieties of bracts in cultivation, the pink one is called Qianrifen, and the white one is called Qianribai. . Flowers of different colors have different names.

A week later, I was surprised to find that green shoots appeared in the bare soil. Xiaoya is sticking her head out of the soil, tilting her head shyly and looking at the world around her curiously. Careful observation shows that the bud of each seed has two petals, which grow up day by day and gradually straighten the waist.

On the eleventh day, the first pair of small oval leaves grew out of the thousand-day red. Now twenty days have passed, and some amaranth has grown seven leaves, which are ten centimeters high. They are covered with thick fine hairs and feel furry. It suddenly occurred to me that their growth rate is so amazing, when will they bloom? With this question, I checked the information, and it takes about 80 to 1 16 days to bloom. It seems that it will take at least two months to see the beautiful thousand-day red!

Chapter 4: Observation-Zizhu Flower

Mother planted a purple bamboo flower at home, and I watered it every weekend. This weekend, I went to fetch water as usual, and when I was free, I squatted down to observe the purple bamboo flowers carefully.

The stems of Zizhu flowers are cut like bamboo, and the leaves are a little long and oval, and the color is very deep purple. Some people feel as if they are black, and the leaves are alternate leaves (here and there, asymmetrical).

Purple bamboo flowers grow very fast. I remember that three months ago, the purple bamboo flower was just 6.3 cm. In order to measure the height of purple bamboo flowers, I specially inserted a bamboo pole and marked it on the table. Today, take a closer look at "Ah, purple bamboo flowers grow so fast!" "I shouted in surprise. In three months, the purple bamboo flower has almost doubled, and now it is almost as tall as the bamboo pole I inserted.

Purple bamboo flowers are beautiful, but they last only two days. The flowers are dark pink, the core is yellow, and there is a little green, which is very beautiful. Its petals are small, but many, several layers inside and outside!

Bamboo blooms and grows taller and taller. My mother said that planting purple bamboo flowers is in the hope that my study can also be like this kind of purple bamboo flowers.

Chapter 5: Observation-hyacinthus orientalis

Today, I found a bud in hyacinthus orientalis changed from lavender to purplish red. A few days later, the purple bud suddenly bloomed first. It's like a red trumpet, and it sounds like a shy flower in March. One, two, three. . There are more and more flowers in hyacinthus orientalis, more and more pink smiling faces, and longer and longer poles supporting buds!

Now, this potted flower in our house is very bright. They are beautifully dressed, slim and fragrant, which brings us a beautiful and fragrant spring!

8. Write a 70-word composition on observing plants.

We live in a colorful world of plants,

Usually pay more attention to observation,

In order to get to know each one.

Only by writing a composition can we correctly reflect the phenomenon of plants.

Observing and understanding a plant can generally adopt the following methods:

1

According to field observation.

That is, first look at the whole, and then look at the roots, stems, branches, leaves and fruits in a certain order.

Observe three parts. For example, bamboo nodes have underground roots and fibrous roots; The bamboo pole is cylindrical and medium.

Empty and knotty; The leaves are long and narrow and the veins are parallel; Bamboo teeth are called bamboo shoots;

60

Old bamboo will blossom and bear fruit only when it is over 20 years old.

Fruit. The shape of bamboo is clear, straight and upright.

2

Observe in stages.

We should have a comprehensive understanding of a plant,

Long-term observation is needed according to the progress of plant growth.

because

For the development, growth, development, fruiting and decline of plants in nature, the morphology of each period is different.

Yes

For example, the newly grown leaves of Parthenocissus tricuspidata are bright red.

Grow up and turn into a tender green.

Leave in a few months

The longer the seeds, the longer the vines. Parthenocissus tricuspidata stems have petioles, with six or seven protruding from the opposite side.

Dendritic filaments,

Every silk is like a snail's antenna.

The new filaments are also bright red,

This is the foot of Parthenocissus tricuspidata.

When the foot touches the wall, the heads of six or seven filaments become small disks, which hold the wall and hold the tender stems tightly.

On the wall. In this way, I climbed onto the roof one by one. The feet that didn't touch the wall withered in a few days. already

Thin, small disks touch the wall,

All turned gray,

Stick firmly to the wall.

Parthenocissus tricuspidata has dense leaves in summer.

Layer; Autumn leaves are yellow and withered; In winter, the walls are full of houses, leaving only withered vines criss-crossing. Spring breeze in the coming year

Blow, die, resurrect.

three

, comparative observation.

There are many kinds of plants in nature, and some plants with similar shapes can only be compared.

Can tell.

For example,

Roses,

Ross,

Roses belong to the same category,

They are all ornamental flowers.

They are colorful,

Rich in flavor and similar in shape. If we compare the three kinds of flowers together, we can find out their differences.

Similarity leaves are different, the leaves of Chinese rose flowers, each stem.

3 - 5

Slice, smooth; rose

5 - 9

Pieces, pilose; rose

5 - 9

Flaky, veined, wrinkled. Different flowers, roses, single flowers, long flower stalks, colors, flower diameters.

five

Cm or above; Roses, flowers clustered in cones, corymbs, flower diameter.

three

About cm; Roses, flowers

Single species or ethnic groups, there are two kinds of red and white, with short flower stalks. The thorns and fruits of these three kinds of flowers are also different.

The above are common methods for observing plants.

You can use it flexibly when observing.

Use these methods carefully.

After observing the plants, write down the observed things in a certain order. This is an organized and informative article.

Real articles.

9. Observation Month of Plant Composition 12

Today, I took a piece of garlic and gently peeled off a layer of white skin. Then I found an empty mineral water bottle, cut off the big piece on it, leaving only the bottom part; Then pour in half the water, and then put the garlic in. Know what I'm doing? Yes, I'm kind of garlic.

March 65438, 2003

Today, I found that garlic is a little green on its head. Garlic is going to sprout! I quickly changed a bottle of water and found that the roots had grown. I took a ruler and measured it. The root is only a little long, about1mm.

March 2005, 65438

Today, I came to see my garlic. Ah, the garlic bud was a little hazy the day before yesterday, so I couldn't see it clearly. Now the green shoots have been drilled out, there are two * * *, about 7 mm long. Afraid of insufficient nutrition in the water, I changed the water again.

March 65438, 2007

Today, we found that the green bud of garlic is very long, about 1 cm long, and the other one grows faster, with a total length of1.3cm.. When changing water, it was found that the garlic root was 4 mm long and * * * was 5 mm long.

March 65438, 2009

I changed the water to garlic today. It was found that the bottom of garlic was soaked in water, and a thin layer of white skin was tightly attached to garlic, which was fleshy, while the upper part of garlic was still so white without being soaked in water. But I found the white skin protruding a little. I guess it may be sprouting again.

March 22(nd)

Today, a small green bud with a length of about 3 mm was found on a small spot with white skin protruding. I was so happy that I quickly changed the water for fear that the nutrients in the water could not satisfy the growth of garlic. I also found that two small green shoots grew 1 cm, the tallest 2.5 cm and the shortest 2 cm. Garlic roots have also become spiral.

March 23

Today, it is found that the green shoots of garlic are 3 mm long, 2.9 cm at the highest, 2.3 cm in the middle and 6 mm at the shortest. I can't measure garlic roots with a ruler, because the roots are twisted. I estimate that they are 6 mm long.

March 24

Today, I found that one of the three green shoots was drilled, and it was less than 1 mm, so change the water quickly. I took a ruler, the longest of which is 3 cm long. I thought: How did this garlic sprout suddenly grow so fast? The day is getting longer. I don't know what's going on.

March 25

Today, it was found that the tallest garlic bud was 5 mm long, the little green bud just emerged was 2 mm long, and the two in the middle were 3 mm long. Finally, I changed the water again.

Friendly care from friends and meticulous care from relatives. Emotions and sorrows are all your moods. Write a calm mood and enjoy the beautiful things around you without any ups and downs in the day. What moves you and makes you angry can be recorded in the mood diary. Write whatever you want, and ask your heart if you want to keep a diary! Let the Internet record my mood diary, collect other people's mood diaries, and let him stay on this webpage no matter whether he is in a good mood or in a bad mood, leaving the most authentic memories.