Metasequoia glyptostroboides is a national first-class protected plant.

Plants protected at the national level. Metasequoia glyptostroboides is a deciduous tree of Taxodiaceae, which is one of the existing precious tree species in China. It is praised as a living fossil by the world biological community and distributed in Wanxian, Sichuan, Lichuan, Hubei, Longshan, Hunan and Sangzhi. 1999 was approved as a national first-class protected plant in the State Council on August 4th.

Metasequoia glyptostroboides, gymnosperms of Cupressaceae. Deciduous trees with opposite branchlets and drooping leaves. The leaves are linear, opposite, pinnately compound, 1- 1.7 cm long, with 4-8 stomatal lines on the lower sides. Monoecious. The cone is pendulous, nearly spherical, slightly quadrangular, with a length of 1.8-2.5 cm and a long stalk; The seed scales are woody and shield-shaped, with 5 ~ 9 seeds per scale. The seeds are flat and surrounded by narrow wings.

It likes light, is not tolerant of barren drought, purifies the air, grows slowly and is easy to survive after transplanting. The adaptive temperature is 8 ~24 degrees below zero. Distributed in parts of Lichuan, Shizhu and Longshan counties at the junction of Hubei, Chongqing and Hunan provinces, the vertical distribution is generally at an altitude of 750 ~1500m.

There were about 6-7 species of Metasequoia in Mesozoic Cretaceous and Cenozoic, which were considered extinct in the past. 194 1 year, China botanists first discovered this famous ancient and rare tree species in Modaoxi, Wanxian County, Lichuan City, Hubei Province. Metasequoia glyptostroboides is known as "living fossil". It is of great significance to the study of ancient plants, paleoclimate, paleogeography and geology and the phylogeny of gymnosperms.

Metasequoia glyptostroboides has strong adaptability and likes wet growth, and is cultivated all over the south of Beijing. This material is light and soft, and can be used in construction, sheet metal, paper making, etc. Beautiful trees, ornamental trees in the garden

Extended data

Main value

Metasequoia glyptostroboides leaves have the effects of "expelling wind and removing dampness, promoting blood circulation and relieving pain". Leaves and fruits have the effects of clearing away heat and toxic materials, diminishing inflammation and relieving pain. Modern pharmacological research shows that it contains a variety of flavonoids and has the effect of resisting myocardial ischemia, arrhythmia and myocardial hypertrophy. At the same time, it has the effects of anti-platelet aggregation and improving hemorheology in rats. The volatiles of Metasequoia glyptostroboides leaves contain a large number of active components with antitussive, expectorant, antiasthmatic and anti-inflammatory effects, among which α-pinene, trans-syringone and myricetin are the main components.

Metasequoia glyptostroboides has white sapwood, reddish brown heartwood, light and soft material, flat texture, slightly coarse structure, great difference in hardness between early and late wood, and is not resistant to water and humidity. It can be used in architecture, metal plate, paper making, vessel manufacturing, modeling and interior decoration. Metasequoia glyptostroboides is a "living fossil" tree species and an ornamental tree species of autumn leaves. It is most suitable for row planting, cluster planting and patch planting in gardens, and can be used for greening embankments, lakesides, Chi Pan, courtyards, potted plants and patch planting to create scenic forests and adapt to evergreen ground cover plants; It can also be planted in front of buildings or used as a street tree. Metasequoia glyptostroboides has certain resistance to sulfur dioxide, and it is an excellent tree species for greening in industrial and mining areas. ?

Baidu encyclopedia-national first-class protected plants

Baidu encyclopedia-Metasequoia glyptostroboides