What plant will slowly put away its leaves when you touch it, very slowly?

Mimosas close when they touch a leaf, where the "principle" is really interesting.

Mimosa's leaves shrink because there is a large vascular bundle in the center of the leaf pillow, which is surrounded by parenchyma with many intercellular spaces. When the vibration is transmitted to the leaf pillow, the cell fluid in the parenchyma cells in the upper half of the leaf pillow is discharged into the intercellular space, so that the turgor pressure of the upper half of the cells in the leaf pillow decreases, while the lower half of the parenchyma cell space still maintains the original turgorical pressure, resulting in the leaflet erect and the two leaflets closed, and even the whole leaf hangs down.

This special ability of mimosa has its historical roots. Its home is in Brazil, tropical South America, where there are frequent winds and rains. Whenever the first drop of rain hits the leaves, it immediately closes its leaves and the petioles droop to avoid the damage caused to it by the storm.

It is an adaptation that adapts to changes in external environmental conditions. In addition, the movement of the mimosa can also be seen as a form of self-defense, as soon as the animal touches it, it closes its leaves, and the animal does not dare to eat it anymore.

Roll cypress ** appreciation (19 photos).

perennial herbaceous plant, 5 18 cm high, main stem erect, often single, with many fibrous roots on the stem; The upper part is clustered in a whorl-like cluster, mostly branched, and the branches are bifurcated several times. The leaves are scaly, divided into middle and lateral leaves, densely covered with shingles, the two rows of middle leaves are slightly narrower than the lateral leaves, the surface is green, the leaf edge has a colorless membranous margin, and the apex is gradually pointed into a colorless elongated mango. The sporangia are solitary in the leaf axils of the sporophylls, monoecious, irregularly arranged, and the large sporangia are yellow, with 4 yellow macrospores inside.

Microsporangia are orange-yellow, with most orange microspores.

The main difference between cushion juniper and cypress is that fibrous roots are scattered. The middle lobes (ventral lobes) are in two rows, ovate-lanceolate, arranged straight upwards.

The left and right sides of the blades are unequal, and the inner edge is straighter. The outer edge is often thickened by the inward fold and is in the shape of a full margin. The peculiarity of the curly cypress is that it is extremely resistant to drought and "death" and resurrection.

However, it grows in a very special environment, often growing in dry rock crevices or on barren rocky slopes. In such an environment, there is no guarantee of moisture, and only some passing water flows quickly when it rains. However, with the survival skills of living with water and "dying" without water, the curly cypress not only does not die in drought, but has been passed down from generation to generation.

When it is alive, the branches and leaves of the curly cypress are stretched and green, and they try to absorb rare water. Once it loses moisture**, the branches and leaves are clumped together and lose their green color, as if they are dead. With the presence or absence of water in the environment, the life and "death" of the curly cypress are also alternated, so it is also called the yang grass, the soul grass, the longevity grass, and the evergreen in the folk.

Scientists call the grass a "resuscitation plant," as if it fell asleep during a drought and woke up again when it encountered water.

I used to see people selling it in the township market, 30 yuan a catty, and the pharmacy should sell it.

Because mimosas are so showy. As soon as I heard him, he blushed.

It's called a mimosa, so it will shrink together.

Because, mimosa is native to the tropics , where there are many storms, and when a storm blows the leaflets, it immediately closes the leaves, protecting them from the ravages of the storm.

Because mimosa leaves are delicate.

I'll tell you a lot of things.