Study On The Pharmacognosy Of Four Species Plants Of Sedum L.

Sedum L. includes about 400 species around the whole world and they are widely distributed in temperate and tropical zone.In China,these pharmaceutical plants have been cultivated and used in curing different diseases for many centuries.In this thesis,Sedum sarmentosum Bunge,Sedum aizoon L.,Sedum verticillatum L. and Sedum spectabile Mem.,the four species are systematically studied on pharmacognosy.The morpholog of the four species are described and the herb history proof of Sedum sarmentosum Bunge is researched.The five parts including root,stem,leaf, flower, floral shoot of the four species' tissue structure are observed and described;The three parts including root,stem,leaf of the four species' character of powder are observed and described.RAPD technique is applied to obtain the four species' identify model,which is accurate and reliable.The relationship of the four plants are researched.The dry entire plant of Sedum sarmentosum Bunge is extracted by water and isolated by chloroform and acetic ether.Two crystals are gained.The Chemical constituents of the essential oil of the foregoing plant are also studied.