STUDIES OF PACIFIC ISLAND PLANTS. XXVI. METROSIDEROS COLLINA (MYRTACEAE) AND ITS RELATIVES IN THE SOUTHERN PACIFIC

The genus Metrosideros (Myrtaceae) is an abundant and taxonomically confusing component of the vegetation throughout much of its range. In the southern Pacific, from the New Hebrides eastward to the Society and Tuamotu Islands, the genus is represented by one variable species, M. collina (J. R. & G. Forst.) A. Gray, in which three widespread varieties seem to merit recognition. An attempt is here made to clarify the nomenclature and inter-relationships of these varieties. Additionally, two local endemics are related to the M. collina group—M. gregoryi Christophersen in Samoa and M. ochrantha A. C. Sm. (sp. nov.) in Fiji.     

STUDIES OF PACIFIC ISLAND PLANTS. XXVII. THE GENUS GARDENIA (RUBIACEAE) IN THE FIJIAN REGION

The genus Gardenia (Rubiaceae), noted for its beautiful and fragrant flowers, is widespread throughout the Old World tropics. In the Fijian Region it is represented by eleven indigenous species, of which eight are endemic to Fiji; an additional oriental species is occasionally found in cultivation. The taxonomic relationships and nomenclature of these species are discussed, and one new Fijian species, G. anapetes, is described.     

江西种子植物特有属的生物多样性及其保护

江西植被中拥有中国种子植物特有属５６个（含８０种）,是华东特有属的生物多样性最显著的地区。通过近年调查和数量分析,研究了江西植被中中国种子植物特有属的物种多样性、空间分布格局、生态地理特性及生物多样性中心,探讨了本区与邻近地区中国种子植物特有属分布的联系及其重要地位,并对特有属的生物多样性保护与持续发展提出了切实可行的对策。     

纹吉丁属及其近缘种鞘翅超微结构的比较研究(鞘翅目,吉丁科)

比较研究了8种纹吉丁和7种近缘属种类鞘翅刻点的超微结构,研究表明纹吉丁属鞘翅刻点结构具有属、种特异性.纹吉丁属不同种类鞘翅刻点的形态相似,仅大小、密度和弯曲程度不同.纹吉丁与其近缘属种类鞘翅刻点的形态结构差异显著.同时表明,外部形态相似的类群,鞘翅刻点的形态结构未必相似,体现了吉丁鞘翅形态结构的多样性.     

海南岛特有植物的研究

地海南岛的特有植物进行了统计分析,结果表明;涤南岛的中国特有属有１９属,其中海南特有属８属;中国特有种１１１０种,其中海南特有种５０５种,隶属于７９科,２６７属,论述了海南特有种的科属组成和地理分布,并对石灰岩地区的特有植物作了简要分析,从海南岛与我国其地区共有的中国特有种的统计可以看出,海南岛与广东的关系最为密切,次为广西,再次为云南,与华中的关系较为疏远。海南狄约暗荷戏搴０谓系退?     

中国种子植物属的分布区类型

中国种子植物属的分布区类型的研究起始于1952年,当时由于全国植物学工作者的共同努力,已基本完成了中国种子植物属的检索表,而为本项研究提供了极其初步,却比较清晰的轮廓。其后,在中国科学家组成访苏代表团时,我又结合中国植物区系分区问题,初步分析了中国全境以及境内各自然植物区的特有科、属。     

AMYLASE POLYMORPHISM IN CITRUS AND SOME RELATED GENERA

Amylase polymorphism was studied by electrophoresing crude protein extracts from mature leaves of Citrus and some related genera in polyacrylamide gel slabs. A total of 25 isoenzymes distributed within 2 distinct zones were resolved. Cultivars of C. medica were the least polymorphic with 5 isoenzymes, those of C. paradisi were the most polymorphic with 14 isoenzymes; the other taxa were between these two extremes. Cultivars within species, in general, had no qualitative differences in their isoenzymes profiles with the exception of C. aurantifolia, C. limon, and C. aurantium. Certain isoenzymes showed quantitative differences among taxa. Data provided evidence substantiating the presumed hybrid origin of some taxa. The potential of isoenzyme profiles in taxonomic and genetic studies was discussed.