The five-needle pine is named after its five leaves. There are many varieties of five-needle pine, among which the big pine with the shortest needles (about 2 cm long leaves) and tight branches is the most precious. At present, the five-needle pine bonsai has been widely planted in all parts of China. Pinus pentaphylla is a superior tree species for making bonsai, with its short plants, slow growth, dense leaves, elegant posture and beautiful tree shape.

Pinus pentaphylla is an evergreen coniferous tree of Pinaceae. The leaves are needle-shaped, about 3 cm to 5 cm long, thin and smooth, and every 5 needles are clustered into a small bundle, most of which are clustered on the top and side branches. The commonly cultivated five-needle pine with twisted needles grows spirally; Yellow-leaved five-needle pine with yellow-green needles or yellow spots on green needles; White-headed five-needle pine, the apex of the needle is yellow and white; Five-needle pine with short leaves, thin needles, dense and extremely short, only half the length of ordinary five-needle pine. Evergreen trees. The bark is grayish brown, the old trunk has irregular scaly peeling, the endothelium is reddish brown, the annual branchlets are light brown, densely yellowish pilose, and the winter buds are oval and yellowish brown. Short leaves, five needles in a bunch. There are white stomatal lines on both sides of the inner side. Flowering in May, the cones are unisexual, the male cones gather at the lower part of the new branch, and the female cones gather at the end of the new branch. The cones are ovoid. From October to November of the following year, the seeds are mature, obovate, with triangular wings and light brown. Five-needle pine is a tree species with high ornamental value, which is not only suitable for garden decoration, but also an important tree species for potted plants or bonsai. In order to maintain a good tree posture, control the growth of branches and leaves, and achieve a short, dense and vigorous shape of branches and leaves, it is necessary to carry out regular plastic pruning. When the buds of Pinus yunnanensis germinate and grow longer, 1/2 to 1/3 of the buds are removed, which can avoid the overgrowth of branches, and make the growth and development of lateral buds uniform and robust, so as to reduce nutrient consumption and achieve vigorous and beautiful tree posture.