Identification of Pterocephalus hookeri Microscopic characteristics and effective component‘s dissolution of nano particles ofAstragalus membranaceus var.mongholicus Comparative research on pharmacognostic characteristics and microscopic characteristics of Radix paeoniae rubra from different areas Resources Distribution and Pharamacognostic Identification of Centella asiatica (L.) Urban Produced in China Pharmacognostic Identification of Dried Twigs and Leaves of Rhinacanthus nasutus Studies on macroscopic and microscopic characteristics of Ophiocordyceps xuefengensis Micro scopic characteristics of Liuwei Dihuang ultra micro pulverization Study on characteristics and microscopic characteristics of wild ginseng, wild ginseng under forest, unimplanted ginseng, and cultivated ginseng Comparison on histology of root tubers and fibrous roots of Ophiopogon japonicus and ophiopogonins content