The germplasm resources of pedunculate herpetospermum in Tibet were investigated and collected,and its distribution characteristics were expounded in the recent years,which taxonomic characters were observed and described,and their classification were studied by using botany research methods.These wild pedunculate herpetospermum were classified into 3 species according to the study,which were Herpetospermum pedunculosum(Ser.) Baill.,Thladiantha setispina A.M.Lu et Z.Y.Zhang,Edgaria darjeelingensis C.B.Clarke,and the genus records was replenished for the pedunculate herpetospermum genus in Tibet at The flora of Tibet and listed over again,

Based on the past research of environment friendly fiber mulch film in China,the recent progress of research on environment friendly mulch film were reviewed,and the present problems and future developments direction of agricultural mulch film was also prospected in this paper.