Platycladus orientalis is an evergreen tree, generally 20 meters high, with light grayish brown dry skin and long longitudinal cracks. Branchlets are arranged on a plane. All scales have two kinds of leaves, the central leaf is obovate and rhombic, the back has glandular grooves, and the two sides are boat-shaped. The central leaf is opposite to both sides and monoecious. Both male and female flowers are solitary at the top of branches, and the cones are wide and oval. When nearly ripe, it is blue-green, with white powder, and the seed scales are woody and reddish brown, with 4 pairs of seed scales. When they are mature, they open, with a curved tip on the back, and the seeds come out. The seeds are ovoid, grayish brown, wingless and ridged. The crown of the young tree is oval and spire-shaped, wide and round when it is old, with flat branches and leaves, which are arranged in a plane with the same type on both sides. The flowering period is March-April, and the seed maturity is 9-65438+1October. The crown is broadly oval, and the branchlets are arranged in 1 plane. The leaves are small, scaly, close to the branchlets, arranged in a cross, and there are glandular grooves in the middle of the back of the leaves. Monoecious, with unisexual flowers. The male flower is yellow and consists of opposite microspore leaves. Each microspore leaf has three pollen sacs, in which microspore mother cells produce many pollen grains without air sacs through meiosis. The female cone consists of only four pairs of raw beads, but there are only two pairs of beads in the middle 1 ~ 2 upright ovules. The pearl scales and bract scales are completely healed. The cones matured in that year, the seed scales were lignified and cracked, and the seeds had no wings and ridges.