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Composition of both spermatophyte and pteridophyte flora of a relict Alsophila spinulosa community in Wutongqiao Nature Reserve of Leshan region was discussed. It shows the proportion of Tropic and Cathaysia elements in both spermatophyte flora and pteridophyte flora was almost 2/3 of the total at the genus level, and even more at the family level. There was a distinct ancient endemism phenomenon in spermatophyte flora, owning to being 8 relict and remnant endemism genera in the total of 9. Furthermore, the proportion of Tropic and Cathaysia elements both at family and genus level in the pteridophyte flora were much greater.

选以乐山五通桥桫椤自然保护区-桫椤群落的种子植物区系与蕨类植物区系组成为研究对象，发现种子植物区系在属的水平上热带成分与古华夏成分占到近2/3，在科的水平上则更高；种子植物区系中有9个中国特有属，其中8个为残遗或原始类型的古特有属，表现出典型的古特有现象；而在蕨类植物区系中热带成分和华夏成分所占比重更大。

It indicated evidently tropical floristic remnant and affinity in the Alsophila spinulosa community. Comparing with the fossil flora from late Cretaceous and Tertiary (i.e. Northeast China flora, Fushun flora in Liaoning, Jinggu flora in Yunnan and Shanwang in Shandong) in China, pteridophyte flora of the Reserve was quite similar to that of late Cretaceous. Nevertheless, its spermatophyte flora was little similar to that of Tertiary, where angiosperm were booming in that period.

将之与中国晚白垩纪和新生代第三纪中国东北、辽宁抚顺、云南景谷、山东山旺化石植物类群相比，发现桫椤群落中蕨类植物成分与其晚白垩纪化石植物群有着高度的相似性，而其种子植物组成与其后兴起的第三纪被子化石群不甚相似。

We selected 15 representative floras from different climatic zones from north to south, and did DCA ordination between the Reserve flora and them. It showed that both spermatophyte flora and pteridophyte flora of the Reserve were more close to some southern floras, which located in much lower latitudes.

将之与我国不同气候带15代表性地点的植物区系进行DCA排序，发现其种子植物区系与蕨类植物区系组成都与更低纬度的一些区系更相近，表现出强烈的热带残遗性和亲缘性。

The angiospermae flora of Dongjiang valley is analyzed, including the geographical distribution pattern, the same and difference between the flora of Dongjiang and other floras, then the origination of flora of Dognjiang and the boundaties are discussed, finally the vegetative types of it were also described.

本文为广东省东江流域的植物区系分析，全文分析了东江流域植物区系成分的地理分布区类型，阐述了该区系与不同地区植物区系的异同与联系，探讨了东江流域植物区系的起源和区系的地理归属问题，并对东江流域的植被类型作了概述。

However, the taxa of strictly tropical distribution are still underrepresented in the flora of southeastern Yunnan compared to Indo-Malaysian flora, and the families of mainly subtropical to temperate distribution, such as Magnoliaceae, Theaceae, Cornaceae, Styracaceae, Symplocaceae, Aquifoliaceae and Caprifoliaceae, are well represented in the flora. Some characteristic families of temperate East Asia, such as Diapensiaceae, Dipentodontaceae, Eupteleaceae, Grossulariaceae and Toricelliaceae are also present in the flora of southeastern Yunnan.

由於位於东南亚热带北缘山地及其地质历史原因，云南东南部的热带植物区系中严格热带分布的成分不多，仍以边缘热带成分为主，并有相对丰富的亚热带－温带科如木兰科、山茶科、山茱萸科、山矾科、忍冬科、冬青科等以及一些东亚和喜马拉雅特徵科，如岩梅科、十齿花科、领春木科、茶藨子科和鞘柄木科，显示了它与东亚温带植物区系也有较多联系。

These suggest that the flora of southeastern Yunnan is related to Eastern Asian flora more than other compared floras. It is also revealed that the flora of southeastern Yunnan is biogeographically closer to the flora of southwestern Guangxi than that of southern Yunnan.

与云南南部、广西西南部及越南热带植物区系比较，云南东南部植物区系中热带地理成分的比例相对较低，并且与广西西南部的联系强于云南南部。

On the basis of wild investigation and data analysis, the composition and distribution types of pteridophytic flora in Songyang,Zhejiang are analyzed and a comparison is made between adjacent regions and upland pteridophytic flora, which shows that the pteridophytic flora in Songyang,Zhejiang is composed of 161 species and 7 varieties,72 genera and 38 families.

在野外调查和整理资料的基础上，分析了松阳蕨类植物区系的组成和分布区类型，并与邻近地区山地蕨类植物区系进行了比较分析。

It is clear that the area characteristics are formed by Meconopsis spp. To sum up, this area is similar to Tanggute region in the floristic characteristics. So the flora is not only one of the representative flora, but also one of the core flora of the Tanggute flora.

综上所述，本区同唐古特地区在区系性质和特点等方面基本一致，所以，本地区不仅是唐古特地区植物区系中的一个具有代表性的区系之一，而且是其核心区系之一。

Based on 18 boxes of fossil specimens collected by the author from Xiaheyan, Zhongwei, Ningxia Hui Minority Autonomous Region and some other geological and palaeontological data from both Xiaheyan and the adjacent sections in the east sector of North Qilian Mountains, the present paper studies the botanical characteristics of Middel-Late Namurian Flora in Locality Xiaheyan and represents the primary reconstruction of the Middle-Late Namurian Flora in the Northeast Qilian Mountains, also tries to make available accounts for the correlation between the different Flora provinces, and discusses the origin time of Cathaysian Flora based on the succession and the transmissibility of the plants through the whole Namurian stage.

结合自从大学三年级一直到硕士研究生阶段笔者踏勘过的北祁连山东段地区十几条石炭系剖面，以及对相关文献的整理，笔者初步分析了北祁连山东段纳缪尔中晚期植物群的垂直演化分布情况，并完成了该期全球不同植物地理区系植物群植物学性质方面的简要比较。北祁连山东段地区纳缪尔早期与中晚期植物群的遗传性与继承性，加之华夏植物群的特征分子及一些东方型地方性分子在纳缪尔早期的出现，笔者认为这些无疑为晚古生代四大植物群之一的华夏植物群的起源完成于纳缪尔初期提供了有利证据。

One hundred and thirty four families, 578 genera and 1197 species are recorded in this area. According to the information of historical geology and natural conditions, the composition of seed plant flora and the areal-types of genera were analyzed. The results showed that its origin was rather ancient and its geographical compositions were complicated. There were many species of rare and endangered plants, e.g. Taxus chinensis var. mairei, Bretschneidera sinensis, Emmenopterys henryi, Fokienia hodginsii, Torreya grandis, Phoebe bournei, Ormosia henryi, and so on. Most of these plants had high value in economics and scientific research. According to statistics and analysis of genera in the present flora, 578 genera were divided into 14 areal-types. The ratio of tropical and temperate genera was respectively 48.6% and 49.2%, so its flora was characterized by transitional floristic elements, and in wide connection with the world.

该地区植物种类丰富，共有野生种子植物134科、578属、1197种；根据地史资料和自然条件，通过对种子植物种类的组成和分布区类型的分析，认为该区系起源古老，区系成分复杂；珍稀特有植物多，如南方红豆杉、钟萼木、香果树、福建柏、榧树、闽楠、花榈木等大量古老树种，并且绝大多数具有重要的经济价值和科研价值；区内578属可分为14个类型，热带和温带分布的属分别占48.6%和49.2%，具较明显的南北过渡的现象，与世界各地有广泛的联系。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。