Studies On Resources And Diversities Of Traditional Tibetan Medicinal Plants In Milha Mountain Area Of Tibet Autonomous

The Milha mountain of the Tibet Autonomous Region is one of the collection sites for the traditional Tibetan medicinal plants.For effective protection and reasonable utilization of the medicinal plant resources and by adopted the methods of line-investigation and plot-investigation,we have found there were 233 species of traditional Tibetan medicinal plants in this region,which belong to 149 genera and 59 families.And ratioes of the Spermatophyta families,genera,and species of the medicinal plants are 83.1%,49.01%and 32.01%,respectively.The results of the survey show that:(1) The floristic composition of traditional Tibetan medicinal plants in the Milha mountain is the north temperate(60 genera,40.27%),world distribution(24 genera,16.11%),old temperate(19 genera, 12.75%),the east asia(17 genera,11.41%),and the chinese endemic(2 genera,1.34%).The North Temperate dominates the floristic composition.(2) The dominant families are Compositae,Rosaceae,Ranunculaceae and Labiatae,and they account for 34.34%of the total sum of the traditional Tibetan medicinal plants in the Milha Mountain.The percentage of the families that containing 6-9 species is 26.18%,the percentage of the families that containing 2-5 species is 30.04%,and there is 9.44%that has one family.(3) The traditional Tibetan medicinal plants in the Milha mountain have more living types;and the dominant living type is the herbaceous perennial type(55.36%).(4) According to the official parts,the traditional Tbetan medicinal plants in the Milha mountain have more types also,such as whole grass and aerial part type,seed and fruit type,stem and branch type,leaf type,stem bark type etc.Among those types,the whole grass and aerial part type is the domination,then seed and fruit type is most important,but stem and branch type,leaf type,stem bark type is the minimum(6.88%).But the utilization of the whole grass types,root type,stem and branch type,leaf type,stem bark type can cause the plant died,and most utilization of traditional Tibetan medicinal plants is in the blooming stage,this way directly affect their generative propagation,so,we should take orderly development measures to protect its' natural recovery ability.(5) By comparison of excellent functions of traditional Tibetan medicines,the 233 traditional Tibetan medicinal plant species in the Milha Mountain can divide into 9 types,namely,heat-clearing and detoxifying type,diminishing inflammation type,clearing away heat type,increase appetite and promoting digestion type etc.And the dominant types are heat-clearing and detoxifying type and increase appetite and promoting digestion type.(6) There is 33 rare and endangered species in the traditional Tibetan medicinal plants in the Milha Mountain.for protecting them,we should build the base station of the wild Tibetan medicinal plants in the Milha Mountain.