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Effects of nitrogen and sulfur interaction on their accumulation, translocation and use efficiency in winter wheat Anti-transpirant studies and applications in agriculture Comprehensive research on the state of agricultural drought in five main grain producing areas in China Modeling crop evapotranspiration using remotely sensed vegetation data: A case study of winter wheat in the North China Plain Assessment on capacities of ecosystem monitoring, research and management in Africa A Cluster Analysis of Seedling Characters of the Gramineae The Seedling Types of Gymnosperms and Their Evolutionary Relationships The Origin and Dispersal of the “Lower” Hamamelidae Comments on the Chinese Generic Names of Vaccinium L. and Lyonia Nutt New Material of Polypodiaceae A New Species of Ehretia (Boraginaceae) from Hainan Province An Addendum to the Species Polyalthia litseifolia (Annonaceae) Two New Species of Allium L. from Sichuan New Taxa of Heracleum L. (Umbelliferae) from China Materials for Chinese Ainsliaea (Compositae) Karyotype Analysis of 5 Species of Polygonatum Mill. Studies on Taxonomy and Evolution of Citrus and Its Related Genera by Isozyme Analysis Pollen Morphology of Microula Benth. and Allied Genera (Boraginaceae) On the Systematic Position of Paradombeya Stapf Chromosome Studies of Chinese Species of Malus Mill. Micromorphology of Leaf Epidermis of Chimonobambusa (Bambusoideae) Notulae de Ranunculaceis Sinensibus (XV) Nanodiatoms from Xiamen Harbour (I) A New Taxa of the Genus Epimedium A New Species of the Armeniaca and Revision of the Related Taxa Two New Species of Aspidistra (Liliaceae) from Guangxi, China Two New Species and Rivision of two Specific names of Euonymus Four New Species of Elatostema (Urticaceae) From China A Study on Glutamate Oxaloacetate Transaminase Isozymes of Citrus Germplasm Resources A New Species of Trigonotis (Boraginaceae) from Guangxi Occurrence of Pinus sibirica Du Tour in Da Hinggan Mountains A Revision of the Genus Siratitia Merr. and Two New Genera of Cucurbitaceae A Biosystematic Study on Adenophora gmelinii Complex (Campanulaceae) Materials for Chinese Cloniophora (Chlorophyta) Two New Species of Chinese Cheistolea A New Species of Hedychium Koenig (Zingiberaceae) from Yunnan New Taxa of the Genus Bergenia from Hengduan Mountains New Plants of Gesneriaceae from Guangxi of China (Cont. I) Phylogeny Classification and Geographic Distribution of Rodgersia Gray Karyotype Variation and Evolution of Sect. Thea in Guizhou Studies on the Karyotype and Its Aberration of Nomocharis forrestii (Liliaceae) On Some Problems of Methodology of Bamboo Classification with Special Reference to the Circum-scription of Dendrocalamus Two New Species of the Genus Batrachospermum (Rhodophyta) in China A New Diatom Species of Salt Lake from Shanxi Province A New Species of Polystichum (Aspidiaceae) from Xizang (Tibet) A Taxonomical Study of the Genus Polystichum Roth Section Haplopolystichum Tagawa from Yunnan A Chromosomal Study of Eight Species in Allium Sect. Rhiziridium G. Don in China Comparative Anatomy of Vegetative Organs in the Genus Vitis L. and Its Systematic Significance A New Species of Stigeoclonium (Chaetophoraceae, Ulotrichales) Notes on Aleuritopteris Fee in China New Taxa of Athyriaceae from Hengduan Mountains, China A Taxonomic Study on the Genus Lasianthus Jack in China Application of the Database of Chromosome Image Analysis in Taxonomical Studies of Brassiceae Studies on Karyotypes of the Genus Heracleum from China Phylogeny and Phytogeography of the Betulaceae (to be continued) Paphiopedilum densissimum, a new species of Orchidaceae from Yunnan, China Floral morphogenesis of Wikstroemia delavayi (Thymelaeaceae) and its phylogenetic implication Chalazal region morphology on the endotesta of Magnoliaceous seeds and its systematic significance On extant primitive angiosperms and their phytogeography A revision of Clematis sect. Cheiropsis (Ranunculaceae) The identity of Alpinia nanchuanensis Z. Y. Zhu New synonymies of some species of Pittosporum (Pittosporaceae) Comparative Leaf Anatomy of Nymphaeaceae (s. l.) Characteristics of Wood Structure in Gymnosperms and Their systematic Significance Notes on the Genus Elaeocarpus Linn. from China Materials for the Cyanophytes From China A New Species of Ranunculus L. from Xinjiang New Taxa of Lappula from China New Taxa of the Genus Agrostis from Yunnan A New Species of Calanthe (Orchidaceae) from Xizang (Tibet) Six New Bamboo Species from Guangdong New Taxa of the Genus Rhododendron from Sichuan, Guizhou and Hunan Provinces New Taxa of the Genus Rhododendron from China Nageiaceae—A New Gymnosperm Family A Study on Pollen Morphology of Some Chinese Genera in Tribe Anthemideae A Comparison of the Variation Patterns of Populations Between Two Species of Pinellia from Nanjing Study on Peroxidase Isozymes in Citrus and Fortunella On Circumscription of the Genus Cicerbita Wall., and Two New Genera of Compositae from Sino-Himalayan Region Studies on Pollen Morphology of the Genus Corylopsis Epidermal Features of Leaves and Their Taxonomic Significance in Subfamily Ophiopogonoideae (Liliaceae)