Pine and cypress leaves are slender and needle-shaped, usually consisting of 2-3 needles. These cones are monoecious and monoecious. Most cones are composed of seed scales and lignified when they mature. When the cone is mature, the seed scales open and the seeds fall off; But the scales of some trees remain closed for a long time.

Pine cones usually bloom in spring and summer, but after the pollen reaches the female cones, it will not germinate until the early summer of the following year, so that the female flowers will fertilize and develop into cones (commonly known as pinecones or cones, not fruits). The cones mature after autumn, and the seed scales open, and each seed scale has two seeds.

Function:

1, dust retention and sterilization to alleviate urban air pollution.

2. Release beneficial molecules and activate the air.

3, sound absorption and noise reduction, alleviate urban noise.

Extended data:

Growth habit

Pine trees are very adaptable to the land environment. They can tolerate the low temperature of -60℃ or the high temperature of 50℃, can grow in bare mineral soil, sandy soil, volcanic ash, calcareous soil, limestone soil and various soils from calcareous soil to red soil, and are drought-tolerant, barren and sunny, so they are famous pioneer trees.

Pine and cypress were originally trees that grew in cold regions and mountainous areas. Living in a cold environment for a long time, they have formed a unique cold-proof structure.

Baidu encyclopedia-pine and cypress tree

Baidu encyclopedia-pine and cypress