Study On The Flora Of Seed Plants In Yushan Mountain Range

Located in the south-central part of Jiangxi Province,Yushan Mountain Range extends south to north,adjacent to the Wuyi Mountains in the east,and faces the Jitai Basin in the west and the Nanling Mountains in the south.Yushan Mountain Range is an important branch of the Wuyi Mountains and an important ecological corridor connecting the southwestern part of Jiangxi with the eastern mountainous areas.After field investigation,specimen collection and identification of seed plants in the Yushan Mountains,and collecting literature,the species diversity catalogue was carried out.In this paper,the seed plants in the Yushan Mountains were used as research objects,and the characteristics of the flora in the area were discussed,including phyla analysis,unique phenomena analysis,analysis of rare and endangered plants,and surrounding areas.The system compares and draws the following conclusions:(1)Species rich in diversity and complex geographical composition: There are 2116 species of 176 families and 795 genera in the Yushan Mountain Range,There are 97 species of 51 genera and 51 genera of cultivated seed plants,2019 species of 175 families and 751 genera of wild seed plants,8 families,15 genera and 18 species of gymnosperms,168 families,780 genera and 2098 species of angiosperm.The seed plant family in this area can be divided into 11 distribution types and 6 variants;the genus can be divided into 14 distribution types and 16 variants;the species can be divided into 14 distribution types.(2)The nature of the transition from the southern subtropical zone to the north subtropical zone: Through the comparative analysis of the three levels of families,genera and species,Yushan Mountain Range shows the characteristics of the mid-subtropical flora,and the tropical and temperate components of the region are mutually Convergence infiltration.(3)The origin of flora components is ancient: Yushan Mountain Range are rich in singletype genus,and the gymnosperms such as Taxus chinensis var.mairei,Cephalotaxus fortunei and Pinus massoniana are the species left over from the Mesozoic,and the angiosperms such as Magnoliaceae,Lardizabalaceae,Bretschneideraceae,Sargentodoxaceae,Ranunculaceae,and Hamamelidaceae are ancient groups in angiosperms.(4)The unique components are rich: 2 families with endemic families in China,19 genera belonging to China,867 species endemic to China,and 7 species endemic to Jiangxi.(5)Rich in rare and endangered plants: 16 species of seed plants listed in the IUCN Red List in the Yushan Mountain Range;36 species listed in the Red List of China species;28 species of plants included in Appendix II of the CITES List of Species;16 species of wild plants are protected by the state;and 96 species of wild plants are protected in Jiangxi Province.(6)Compared with the neighboring mountain area,the seed plant flora of Yushan Mountain Range is similar to the Wuyi Mountain Range,and the Luoxiao Mountain Range comes second,.Yushan Ragne is the most important ecological corridor connecting the eastern and western mountainous areas of Jiangxi Province.