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A PHYTOGEGORAPHICAL STUDY ON THE FAMILY DIOSCOREACEAE Effects of domestication on genetic diversity in Chimonanthus praecox: Evidence from chloroplast DNA and amplified fragment length polymorphism data Interspecific delimitation and phylogenetic origin of Pugionium (Brassicaceae) Resource surveys and suitability of origin for genuine medicinal materials,  Astragalus membranaceus var. mongholicus in Inner Mongolia, China.