Because different plants have different physiological characteristics and live in different environments, these three factors are different. These three factors are reflected in a specific leaf, that is, each leaf has its own unique shape, more specifically, each leaf has its own unique vein structure.

From the perspective of vegetative organs, leaves can grow into anything as long as they can produce nutrition, but from the perspective of the whole plant, the growth of leaves must be in line with the maximization of the interests of the whole plant. When designing leaves, plants must consider three important factors, namely, the quality of materials needed to make leaves, the life of leaves and the efficiency of absorbing and transforming sunlight.

Extended data

The shape of the blade is mainly determined by the aspect ratio and the position of the widest part. Common shapes are scales, stripes, spines, needles, cones, needles, spoons, ovals, rectangles, diamonds, hearts, kidneys, ellipses, triangles, circles, sectors, swords and so on.

1, scale shape

Small leaves are like scales and are born close to branchlets. They are called scales, such as cypress plants ?

Step 2 strip

Also known as linear, the blade is long and narrow, the length is more than 5 times of the width, the width of the whole length is almost equal, and the leaf margins on both sides are nearly parallel. Such as Metasequoia glyptostroboides, Ophiopogon japonicus and Abies. ?

3. Spiny shape

It is strip-shaped, but its top is narrow and has a prickly tip. Such as juniper and cypress.