The world's pine tree species a **** probably more than 80 kinds. Most of the pine trees are distributed in the northern hemisphere, from the Arctic near the North Africa, Central America and South Asia to the south of the equator, and our country has 22 species of pine trees and 10 varieties of pine trees, distribution is very wide. Want to better understand how many varieties of pine can continue to look down.

1, North American short-leafed pine: North American short-leafed pine is an evergreen tree species, generally into the tree up to 25 meters high, thick trunk in about 70 cm. The trunk of the North American species is more curved than usual, the branches and leaves are luxuriant, the trunk is brown, the surface is more cracks. The branches grow slowly, usually two to three times a year, and the color of the branches is the same as the trunk.

2, whitebark pine: whitebark pine adult tree can grow up to 30 meters, the bark color is divided into two phases, pre-bark for gray-green, late gray-brown, within the bark is pink. White pine needles about 6 centimeters long, by four needles braided into a bundle. The pine cones ripen in October each year and can be used as medicine to treat asthma, cough and other symptoms.

3, Huashan Pine: Huashan Pine is China's unique species, mostly produced in Shaanxi Huashan. The bark of Huashan pine seedlings is smooth and gray-green. When it grows into a large tree, the bark is dry and cracked, and the pine cones just grow out, the color is green, and the color is light yellow after maturity. The seeds are versatile and can be eaten directly or used for oil extraction.

4, five-needle pine: there are many varieties of five-needle pine. There are many varieties of five-needle pine, all over the country, including the most valuable varieties of Osaka pine. The plant is small, slow annual growth rate, dense branches and leaves, has a good ornamental value.