Why do showy flowers usually have no fragrance?

There are two types of plant pollination, same-pollination and cross-pollination; Among them, cross-pollination mainly relies on insects to transport pollen, which is called insect-borne flowers; Those that rely on wind to transport pollen are called wind-borne flowers. 1.The characteristics of adaptation to wind pollination are:

The flowers are small, not distinct, and mostly densely formed into spike-like inflorescences or soft inflorescences; The pollen is light, large, dry, smooth and easy to be blown by the wind; The flower column tends to be long, and the stigma is swollen or branched in a pinnate shape, which rises above the outside of the flower, increasing the chance of receiving pollen; Many of them have the habit of flowering with preceding leaves, and because the flowering period often precedes the occurrence of branches and leaves, the pollen emitted by the wind will not be blocked by the branches and leaves. In addition, the perianth of the aeolian flower is often degraded or absent, and does not have fragrance and nectar glands. Most of the grasses, as well as the Salix family, Juglans and Shellaceae, belong to the wind pollinators.

2.Most of the insect-borne flowers have a bright and beautiful perianth, aromatic or other smells, or nectar glands. The pollen grains are usually large, with protrusions or patterns on the surface, and the pollen is not easy to be blown away by the wind when the anthers are cracked, and they are often glued into lumps, which are easy to adhere to the insect body, and the pollen amount is generally less than that of wind-borne flowers.

Another characteristic of insect pollination is that the flowers that bloom during the day are mostly bright colors such as red and yellow, and the flowers that bloom at night are mostly white, so that they can be easily identified by insects that are active at night. Insect flowers are mostly bisexual flowers, and under the condition that a certain number of insects are present, the pollinator of hermaphroditic flowers is 1 times more than that of unisexual flowers. The structure of insect-borne flowers is often adapted to the characteristics of specific pollinators, such as sage, rape, sunflower, and apple.

Whether the flowers are fragrant or not mainly depends on whether there are oil cells in the flowers and whether they have glycosomes. Since the volatile oils of different plant varieties contain different substances, some flowers smell good and some don't.

The reason why flowers have a fragrance is because there are oil cells in the flowers that produce fragrance. Oil cells can secrete aromatic oils, which are continuously secreted through oil pipes, and can volatilize with water at room temperature, exuding an attractive aroma, so aromatic oils are also called volatile oils. Because the volatile oil of each flower is different, the aroma emitted by each flower has its own characteristics.

Aromatic oils dissipate quickly in the sun.

Therefore, when the sun is good, the fragrance of the flowers is stronger and spreads farther. Although some flowers do not have oil cells, their cells will continue to secrete some aromatic oils during the process of metabolism. There are also some flowers whose cells do not secrete aromatic oils, but contain a glycosome, which, although it itself does not have an aroma, but when it is broken down by yeast, it also gives off a fragrance.

The fragrance of the flower** has an oil cell in the petals, which constantly secretes aromatic oils with fragrance. Because aromatic oils are easily volatile, when the flowers bloom, the aromatic oils will be emitted along with the moisture, which is what people smell of flowers. There are also some flowers in nature that, although they do not have oil cells in their petals, they also smell like a lot.

It turns out that their cells contain a substance called glycosomes, which do not have a fragrance by themselves, but can also emit an aromatic odor when they are broken down by enzymes. Different flowers have different abilities to secrete aromatic oils and decompose glycosomes, which is why some flowers have a strong fragrance and some have a light floral fragrance. Generally speaking, white flowers and light yellow flowers have the strongest aroma, followed by purple flowers, yellow flowers, and light blue flowers have the lightest fragrance.

But there are exceptions, for example, white peony is not as fragrant as purple rose, because the intensity of the floral fragrance is related to the variety of flowers. Floral fragrance is needed for succession Some flowers are more fragrant when exposed to sunlight, such as sunflowers. Some flowers only give off a strong aroma on rainy days or at night, such as nightshade and gardenia.

Why is there such a difference? Because it is its own need for various plants and flowers to emit different fragrances. In a word, they are all for the needs of seed propagation and generation, and they are all the result of adapting to the environment.

Fragrance can attract insects, and insects play a role in spreading pollen on the stamens, achieving the purpose of pollination, seed setting and passage. Therefore, we must understand that flowers do not bloom because they are to be appreciated, and flowers are not fragrant because they are to be comfortable.

Not all flowers are fragrant Most people think that flowers are fragrant, right? This is not the case. It is said that there are more than 200,000 species of flowering plants on the earth, but only a small number of flowers can emit fragrance.

And any kind of flower, color, fragrance, rhyme is not much, a very small number of flowers still have a smell, such as Houttuynia cordata flowers are very smelly. Color has an effect on floral fragrance Red, orange, yellow, green, blue, purple, and many colors of flowers. So, do different colors of flowers have an effect on the smell of flowers?

Through investigation and research, someone obtained such a table: Color White, Yellow, Red, Blue, Purple, Green, Tea, Orange Total Scented 362 136 161 54 40 22 7 4 186 Unfragrant 891 801 752 533 260 129 10 44 3349 Smelly 12 14 9 7 7 2 1 2 54 This table tells us that the number of scented white flowers is very large.

Orange flowers are almost unscented. There seem to be very few brown flowers, but the proportion of scented flowers in brown flowers is the highest.

There is a kind of oil in the petals, which will continuously secrete aromatic oil with a fragrant flavor. Aromatic oil is easy to volatilize, so there will be a floral fragrance in the air, and some flower seed oil cells are underdeveloped, so the fragrance is very weak and peppermint is a truth, peppermint has a gland on the leaves, called the aromatic gland, the taste is very strong, if the gland is broken, it will smell a very strong mint smell

Non-system partition, then right to run "Install System." exe", press enter directly to confirm the restore operation, and confirm the automatic installation operation again (pay attention to back up the important data of the C drive before execution).

Some flowers are very fragrant, and some flowers are not very fragrant.

The floral fragrance is because there is a lot of pollen.

Brightly colored flowers are generally not very fragrant, because color alone is enough to attract insects to act as a medium for them.

Most of the white light-colored flowers are strangely fragrant, and there is no gorgeous appearance, so they can only rely on the "strange fragrance" contained in them to attract insects to sit on the medium.

In short, it is for the sake of reproduction and continuation.

Flowers, like people, are good and bad! There's no why, it's a fact!

Because fragrance is useless to some flowers, why should it waste energy to make flowers fragrant?

Yes. It's so fragrant. Some are fake, some are true.

People often refer to flowers as fragrant flowers. However, not all flowers are fragrant, and some beautiful flowers have a smell. Flowers or leaves such as five-color plum, Haizhou Changshan, and dragon spit pearl often have some unpleasant odors; When the leaves of Houttuynia cordata are crushed, you will smell a fishy smell.

These odors are dispersed into the air, which can protect the plant itself from being eaten by certain pests. The smell of some flowers attracts insects that fly into the flowers to help spread pollen, so that they can produce full seeds.

The fragrance of the flower mainly comes from the glands at the base of the petals and the volatile oils secreted by the petal cells. In the wind-borne flowers (about 1 10 angiosperms), most of them do not have a perianth, so they have no fragrance. (Although maple and maple have flower perianths, there are no nectar glands and volatile oils, so there is no floral fragrance).

Only insect-borne flowers will have a fragrance. Almost all wind flowers are unscented, and some insect flowers only have bright colors and no fragrance.

Everything has its own laws of growth.

The fragrance of some flowers is faint and people's nose can't ask.

It constantly secretes aromatic oils with a scent.

That's determined by the stamens that have flowers.

Flowers all have their own aroma, but the degree of aroma they contain is different. The fragrance of some flowers is faint and people's nose can't ask.

1. Tulip: Tulip is a perennial herbaceous plant of the lily family and tulip genus, and its own flowering has no fragrance.

2. Poppy: The flowers of poppies are solitary at the tips of stems and branches, and have no fragrance.

3. Vermilion: Vermilion is a perennial herbaceous plant of the family Lycoris and Vermilion, with 6-8 leaves and 2-4 flowers.

4. Crab claw orchid: Crab claw orchid is an epiphytic succulent plant of the cactus family and the genus Crab Claw Orchid.

5. Others: sunflowers, a bunch of red, morning glory, dandelion, etc.

In the laws of survival in nature, the evolution of living things constantly discards the unnecessary parts of themselves and moves in the direction. Each organism's own organs, smell, and behavior have their own characteristics and values. For plants, the flowers of the plants are not for people to see, but for the beautification of nature, and the colors and smells are just ways to attract moisture from insects.

Many insects in nature collect pollen with color as the target, and they can accurately tell if the plant pollen is what they need by the color, but they don't care about the taste of the flower! For colorful plants, a strong smell may seem superfluous, and over time, this aspect of the function gradually degrades!

Some insects in nature are not very sensitive to color and cannot distinguish the color of the flower and find the desired flower, but are very sensitive to odors and can even distinguish very subtle differences. Insects, with their keen sense of smell, are able to find the flowers they need accurately and quickly, and for plants with strong aromas, it doesn't matter if they have gorgeous flowers. So in the long process of biological evolution, gorgeous flowers gradually degenerate.

Some plants in nature are more extreme, without gorgeous flowers, without a charming floral fragrance, relying on natural wind and water to spread pollen. As a result, these flowers do not have bright colors and do not have a fragrance.

Whether it's bright colors or tangy aromas, it's the result of nature's evolution. A particular color or petal is enough to attract insects. Then a strong aroma is useless.

Similarly, bright colors are not so important because of the special smell that the flowers emit that accurately convey the message that the flowers invite insects. Xiang Xuelan will not forget as long as she sees that friend. The flowers are gorgeous, and the floral fragrance is a faint cardiopulmonary aroma.

It is interesting, with bright flowers and a variety of colors intertwined. It can be said to be a famous product of flowers. Some friends especially like Xiangxuelan, and they can raise dozens of pots at home.

This fragrance is refreshing, and when placed indoors, you can see what people like. Especially cold-tolerant, autumn and winter bulbs, in early spring, flowers are in full bloom, cold-resistant and drought-resistant, and are typical lazy flowers.

Needless to say, orchids are generally held in winter and spring, and the aroma of orchids is incomparable. Chunlan, Jianlan, and peony in spring are all blooming in spring. You can smell the fragrance of your home at any time.

Placing it at home can improve the style, the hometown of Gulead Qing has a good temperament, and it is more difficult for Qi Xian to plant orchids. This belongs to the more delicate flowers, indoor maintenance, must increase the humidity of the air. Watering should also be done well, so as not to dry out the yellow leaves.

Moisture is just right.

Because these bright flowers have been given more of their nutrients to the color, its aroma is slightly less than the first mountain faction, and those light-colored flowers, it has more nutrients left on the fragrance.

Because brightly colored flowers can spread pollen by color, while light-colored flowers rely on aroma to spread pollen.

Because the darker the flower, the more it will hide the fragrance, and it is very bright from a distance, but the closer people go, the lighter the fragrance will become.

This is absorbed by the light source, because they are not the same color on the light source, and the maturity is not the same.

In life, we can find that many very colorful flowers are not scented, but the flowers that grow very elegant have a very pleasant fragrance, why is this?

It turns out that the color and smell of flowers are both tools for plants to attract insects to spread pollen.

Many insects can identify exactly the flowers they need by their color alone, and the insects don't care about what the flowers smell. And some insects are very sensitive to the smell of flowers, even the slightest difference can be distinguished. With this keen sense of smell alone, you can accurately trace the flower you want; As for whether the flowers are beautiful or not, I don't care.

There is a general tendency in the evolution of organisms to keep discarding what is superfluous. A specific color or petal is enough to attract the insects you need, so the strong aroma is redundant; In the same way, since the special smell of flowers can accurately convey the message that flowers invite insects, bright colors are completely unnecessary.

Some of the flowers emit a very bad smell. In addition to heather, there are also some flowers that are unbearable. Next I will list a few flowers that taste extremely bad to your question:

Most of the flowers are praised as beautiful and fragrant, but there are also some flowers that emit a very bad smell. In addition to heather, there are also some flowers that are unbearable. Next I'm going to list a few flowers that smell extremely bad to your question.

1.Clematis: Clematis is a beautiful aquatic plant, but its flowers give off a foul-smelling smell that some people describe as rotting meat.

2.Nightshade: Nightshade is a white flower, but its fragrance has been described as a suffocating heavy smell, and some people even feel dizzy.

3.Malan flowers: Blooming in the summer, the flowers are small but have a very unpleasant smell, some describe it as the smell of urine.

4.Sunflower: Sunflower is a tropical plant whose flowers have a very pungent smell, and some people even describe it as smelling like a chemical.

Ma Lanhua: Also known as "Ma Lan", its flowers are lilac or white and have an aromatic smell, but the smell of the buds is quite pungent and is said to make people dizzy.

5.Rhubarb: Also known as "yellow paulownia flower", the trembling sail flowers are very small, pale yellow or green, and the flowers are clustered into conical inflorescences. It smells so bad that it has been described as "stinky".

6.Water hyacinth: The flowers of water hyacinth are very small, pale yellow or white in color, and usually grow in water. Its smell is so foul that some have described it as "the smell of carrion".

7.Aloe Vera Flower: Also known as "aloe flower", aloe vera flower has a pale yellow or green color and is shaped like a bell. Its smell is so pungent that some have described it as "like carrion".

8.Snow Lotus: The Snow Lotus is an alpine plant that has white or pink flowers that resemble roses in shape. It emits a smell similar to rotten eggs, which makes people shudder.

9.Foul-smelling sage: The flowers of foul-smelling sage are purple or white in color and resemble lavender in shape. It smells so bad that it has been described as "the smell of dead rats".

10.Razor beans: The flowers of razor beans are yellow or white in color and resemble a fan in shape. It smells so pungent that some people describe it as "smelling like stinky socks".

In short, in addition to heather, there are many flowers in the world that exude an unpleasant smell, and although these flowers are not loved by people, their presence also brings us a colorful and diverse natural landscape.