Arborvitae is an evergreen tree with a height of up to 20 meters and a breast diameter of up to 1 m. The saplings are apex-shaped, the old trees are broadly rounded; the bark is thin, light gray-brown, strip-like [3] longitudinally split; the large branches are oblique; the branches are flat, flat, and free of white powder. Leaves scaly, leaf type II, central leaf obovate-lobed, glandular groove on the back, leafy on both sides, central leaves and opposite leaves alternate. Both male and female are different flowers, male and female flowers are born on the top of the branches; male flowers have 6 pairs of stamens, each stamen has anthers 2 - 4; female bulbs have 4 pairs of beads, and the middle 2 pairs of beads have 1- 2 ovules. The cone is broadly ovate, blue-green is white powder when near maturity, woody in scale, reddish brown, 4 pairs of scales, open when cooked, with a reflexed tip on the back, seed detached, seed ovate, taupe, wingless With ridges. The saplings of the saplings are ovate-tipped, old and broadly round, with flat leaves and branches, arranged in a plane, and the two sides are the same. Flowering period 3---5 months, maturity period 10---11 months.
The arborvitae species are toxic plants included in the Chinese Plant Atlas Database, and their toxicity is that the branches and leaves are slightly toxic. Human and animal poisoning cause abdominal pain, diarrhea, nausea, vomiting, dizziness, foaming of mouth vomiting, sometimes pulmonary edema, tonic or clonic convulsions, circulatory and respiratory failure, etc. Leaf extract has central sedative effect, mouse peritoneal cavity The water decoction LD50 of the injected leaves was 15.2 g/kg, and the LD50 of the petroleum ether extract was 24.38/kg (both equivalent to leaf weight).
Platycladus orientalis is a special species in China, and there is wild in North China. In addition to Qinghai and Xinjiang, there are distributions throughout the country. Artificial cultivation throughout the country. There are often old trees of a hundred years and hundreds of years.
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