Cypress is an evergreen tree of the genus Platycladus in the family Cupressaceae. It is widely distributed in China, ranging from Inner Mongolia and Jilin in the north to Guangdong and northern Guangxi in the south. It is artificially cultivated throughout the country and is an excellent tree. of landscaping tree species.

Cypress is a general term for cypress plants. Cypress includes several genera such as Platycladus orientalis, Juniperus juniper, Hinoki cypress, and Cypress cypress. Cypress trees have dense branches, numerous twigs, dense branches and leaves, and the crown is completely surrounded by branches and leaves. The other side cannot be seen from one side and is mostly a dark green cone. The bark is reddish brown and split longitudinally. Branchlets flat. The leaves are scale-like and small. Monoecious or dioecious, with cones solitary on top of branches. Cones nearly ovate. Seeds are oval and wingless.

1. Morphological characteristics

Evergreen trees or shrubs. The leaves are cross-opposed or whorled with 3-4 leaves, sparsely spiral, scaly or spiny, or the same tree has both types of leaves. Cones are unisexual, monoecious or dioecious, solitary on branch tops or leaf axils; male cones have 3-8 pairs of cross-opposed stamens, each stamen has 2-6 anthers, and pollen has no air sacs; female cones have 3- 16 cross-opposite or 3-4 whorled pearl scales. There are 1 to many upright ovules at the ventral base of all or part of the pearl scales. The sparse ovules are single-centered between the two pearl scales. The bract scales and the pearl scales are completely connate. . Cones are spherical, oval or cylindrical; seed scales are thin or thick, flat or shield-shaped, woody or nearly leathery, open when ripe, or fleshy and berry-like, undehiscent or only slightly cracked at the top when ripe. , developing seed scales with one or more seeds; the seeds have narrow wings or no wings around the seeds, or one long and one short wing at the upper end. [

The crown of young trees is conical or ovate, and becomes broadly rounded when old; the bark is dark gray-brown, split longitudinally, and peeled off into thin strips; the twigs with scaly leaves are thin, green, Spreading straight or diagonally upward, flat, arranged in a plane, green on both sides, biennial branches are green-brown, slightly flat, gradually turning into reddish-brown, and cylindrical; the buds are very small, inconspicuous, and the same color as the twigs. The leaves are scale-shaped, 1 to 3 mm long, with a slightly blunt apex. The exposed part of the leaf in the center of the branch is triangular, with a strip of gland groove in the center of the back. The leaves on both sides are boat-shaped, with a slightly incurved apex, a blunt ridge on the back, and a blunt ridge below the tip. There are glandular spots.

Both male and female cones are born on the tops of twigs. The male cones are yellowish brown, oval, about 2 mm long; the female cones are nearly spherical, about 2 mm in diameter, reddish brown, covered with white powder. The cones are nearly oval, usually with 4 pairs of scales, 1 to 2 cm long, nearly fleshy, blue-green, covered with white powder before maturity, and woody, cracked, reddish-brown when mature. The top pair of scales are narrow, long, and nearly columnar. There is an upward pointed tip at the top, and the two pairs of scales in the middle are oval, elliptical to oblong. There is a small outwardly curved tip below the top. The lower pair is very small, about 2 mm long, sparsely degenerated and not obvious.

The seeds are oval, slightly pointed at the top, rounded at the base, grayish brown to purple brown, slightly 3-spindle, wingless or with extremely narrow wings. The flowering period is April and the fruit ripening period is October.

2. Growth environment

Light: Arborvitae prefers light, but seedlings and saplings have certain shade tolerance. Generally grows on the shady side of mountains.

Temperature: more cold-resistant and less wind-resistant.

Moisture: Tolerant to drought, likes moisture, but not resistant to flooding.

Soil: Tolerant to barrenness, can grow on slightly acidic to slightly alkaline soil.