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Morphological characteristics of Pinus pentaphylla
Five needles pine is an evergreen coniferous tree of Pinaceae. The leaves are needle-shaped, about 3 cm to 5 cm long, thin and smooth, clustered in small bundles every 5 needles, and most of them are clustered on the top branches and side branches. The commonly cultivated five-needle pine has twisted needles and grows spirally; Yellow-leafed five-needle pine with yellow-green or green needles with yellow spots; White-headed five-needle pine with yellow and white needles; Five-needle pine leaves are short, needles are thin, dense and extremely short, and the length is only 1/2 of that of common five-needle pine.

The bark of Pinus pentaphylla is grayish brown, the old trunk has irregular scaly peeling, the endothelium is reddish brown, the annual branchlets are light brown, densely covered with yellowish hair, 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 inside. In May of flowering, the cones are monoecious, 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, and the seeds mature in the following year from 10 to 1 1. Seeds obovate, wings triangular, light brown.

Five needles 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 short, dense and healthy shapes of branches and leaves, it is necessary to carry out regular shaping and pruning. When the buds of Pinus quinquefasciatus are elongated, the buds are moved from 1/2 to 1/3, which can avoid germination, make the lateral buds grow evenly and healthily, reduce nutrient consumption, and achieve vigorous and beautiful trees.