Although the leaves of these phoenix trees are all over the ground, the leaves on the trees are still lush, as if the season is nothing to them, and it is not necessary to strictly follow the footsteps of time, but it still maintains the summer scenery. There will be a lot of fallen leaves on the ground after the storm in summer, won't there? It's just that the leaves have turned yellow, and now they are really like the palms of maple leaves, red and yellow in ginkgo orchards, like fans.

maple leaf

The maple leaf is palmately 5-lobed, with a length of 13cm and a width slightly larger than the length. The three largest lobes have several prominent teeth, the base is heart-shaped, the upper part is medium green to dark green, and the lower part is hairy, which turns from yellow to orange or red in autumn. The bark is grayish brown and smooth, and furrows and scales appear with the growth of tree age. The flowers are yellow-green, small and headless, hanging on slender stems, and open with tender leaves in spring, showing an open inflorescence. The fruit has parallel wings and is 2.5 cm long. Height 30 meters, wide column, deciduous.

Yinxingyuan

The color of Ginkgo Garden is light green, which is different from the leaves of Fraxinus mandshurica. It consists of leaves and petioles, and there is a big wave at the top of the leaves. The whole looks like a fan. Ginkgo orchards sprout every spring. In summer, leaves grow into small fans. In autumn, leaves fall like leaves of Fraxinus mandshurica. When the breeze blows, they chase and play like lovely butterflies. This scene is really intoxicating. In winter, leaves that fall to the ground will be submerged by dust.

Sweet chestnut leaves

Hollyleaf

Hollyleaf is serrated or spiny, while Hollyleaf is very small.

Fraxinus mandshurica

The leaves of Fraxinus mandshurica are dark green, with veins in the middle and many small serrations at the edges. If the leaves stand up, they will look like tumblers. The leaves of Fraxinus mandshurica bloom every spring, wither in the hot sun in summer, turn yellow in autumn, fall from trees, become bare in winter, just like an old man with hair, and finally all his hair falls out.

autumn leave

In my eyes, autumn is a festival when the earth and leaves meet. Some of them danced and threw themselves into the embrace of the earth, while others shuttled across the sky and started their own thrilling voyage.

One day, I went to a small park by bike. There is a natural lake next to the park, and there are several pots of big trees in Kobanawa. The breeze is blowing, and the air is filled with the fragrance of flowers and plants, which is really interesting. At this time, a small leaf fell from the sky. I quickly stepped forward, stretched out my hands and caught this lovely little thing. I compared the leaves of several big trees and wanted to help them find their own "home". But after searching for a long time, I found nothing. I seem to have lost confidence. Maybe this is an orphan. I picked up this poor leaf and looked at it carefully. It looks like a small fan, a bit like ginkgo, but it is not. It also has a beautiful coat. Look, it's red with yellow and yellow with red. How beautiful! It feels slippery and cold. This is ... I smell a fragrance. What is this? I feel strange.

Is this the smell of leaves? I can't believe that the leaf in my hand has such great charm, but I still can't help putting it in front of my nose. Oh, my God, it's really it! I am surprised that a leaf can give off such a charming fragrance. It smells good, doesn't it? ...

As I thought about it, I walked to the small trees by the lake. Great! I helped him find a home! I am extremely happy, but it seems a little reluctant to think that this lovely little thing will leave me. But I can't. I know it needs home, too. I had to reluctantly put it on the branch. Although it is yellow, at least you can feel the warmth of home.

I think: people often praise the beauty of flowers, the straightness of trees and the selfless dedication of grass, but they have never seen the charm of leaves, but in my heart, leaves are the most beautiful.

I love leaves, and I love leaves in autumn more.

tree leaf

Composition of leaves

A complete leaf includes the following three parts:

Leaves-mostly wide and flat, suitable for receiving sunlight.

Petiole-supports the leaf and connects it to the stem.

Stipules-protect young leaves. (Some plants have no stipules, and some plants have long lost stipules. )

leaf vein

Veins are veins with different thicknesses covering the leaves. There are two kinds of veins:

Reticular veins-the veins of leaves are interlaced with each other to form a network. Most dicotyledonous plants have reticular veins on their leaves.

Parallel veins-the veins are not staggered and generally distributed in parallel. Most monocotyledonous plants have parallel veins.

Species of leaves

According to the number of leaves on the petiole, leaves can be divided into two types:

Single leaf-there is only one leaf on each petiole, as shown on the right.

Compound leaves-there are many leaflets on each petiole, as shown on the right.

Leaf morphology

Oval shape: it is oval in shape, widest in the middle and round at the top and base, such as the leaves of camphor tree, rubber tree, osmanthus, tea tree, black date and primrose.

Heart-shaped: it looks like a heart, with a wide round base and a slightly concave top, such as sweet potato, morning glory and bauhinia. Cannabis leaf. If the heart is inverted, it is called inverted heart, such as the leaflets of Oxalis.

Palm shape: the leaves are divided into three or five parts, forming a deep notch, like the palm, such as the leaves of cotton, castor, grape, maple and phoenix tree.

Fan-shaped: shaped like an unfolded folding fan, with a wide and round top and tapering towards the bottom, such as Ginkgo biloba leaves.

Diamond: A Syrian square with equilateral leaves, such as diamond leaves and tallow leaves.

Needle-shaped: Also known as spear-shaped, the leaf base is wide, the apex is gradually pointed, and the length is about 3-4 times of the width, such as the leaves of peach, willow and bamboo. If it is inverted, it is called inverted needle, such as tillering leaves.

Oval shape: shaped like an egg, with a wide bottom and a narrow top, such as the leaves of mulberry, sunflower and sunflower. If the egg is upside down, it is called upside down, such as the leaflets of magnolia and peanut.

Round: shaped like a disk, almost equal in length and width, such as the leaves of the trollius chinensis.

Needle-like: leaves are slender as needles, such as Pinus tabulaeformis, Pinus massoniana and Pinus bungeana.

Scales: Scaly, as the leaves of Platycladus orientalis.

Spoon-shaped: spoon-shaped, with a rounded top and tapering towards the bottom, as in cabbage and plantain leaves.

Triangle: the base is wide and flat, and the three sides are close, such as buckwheat leaves.

The role of leaves

Leaves are the main organs of plants for photosynthesis and nutrient production. Release oxygen for human beings, provide food, shelter from wind and shade.

Leaves turn red: Because anthocyanins increase, acidic leaves turn red. There are also "maple leaves, cypress leaves and persimmon leaves" and so on.

Leaves turn yellow: chlorophyll is destroyed, leaving only lutein. Common ones are "laurel leaves, ginkgo leaves, poplar leaves and phoenix leaves".

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