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Study on extraction technics and variety trends of flavonoids in Chrysanthemum morifolium Trends and Prospect of Basic Research on Root and Tuber Crops #br#in China The Geography of the Campanulaceae: On the Distribution Centres Notes on the genus Clematis (Ranunculaceae) (Ⅲ) Leaf epidermis of Quercus subgen. Cyclobalanopsis (Oerst.) Schneid. (Fagaceae) Morphology of the bracts of Elatostema(Urticaceae)and the evolutionary trends in them A Study on the Relationship between the Growth and Yield of Safflower under Plastic Mulching The Geographical Distribution and the System of Aristolochiaceae Morphology of the bracts of Elatostema(Urticaceae)and the evolutionary trends in them Trends of iFlora by Literature and Information Analysis The distribution patterns and changes of aquatic plant communities in Napahai Wetland in northwestern Yunnan Plateau, China Pollen Morphology and Epidermal Characters of Leaves in Convallarieae (s. l.) Study on variety trends of flavonoids in Catharanthus roseus in greenhouse Study on extraction technics and variety trends of the flavonoids in Sarcandrae glabra The Ecological Agriculture and Its Development in China Spatio-temporal trends for fine root biomass of alpine Rhododendron thymifolium and their significance for ecological adaptation in Qilian Mountain RESEARCH ON DURABLE RESISTANCE TO RICE BLAST DISEASE STUDY ON ECOSYSTEM SERVICES: PROGRESS, LIMITATION AND BASIC PARADIGM Preliminary analysis on natural spread ecological effects of Chimonobambusa utilis (Keng)Keng f. URNANIZATION IN CHINA AND THE TRENDS OF ITS DEVELOPMENT