The somatic chromosome number of PseudOlarix amabilis (Nekon)Rehd. Endemic to China is found to be 2n=44,which is different from n=12(Miyake & Yasu1,1911) and 2n=24(Dumeu-Vabre, 1961).
We conducted two bird surveys in the Laoxiancheng Nature Reserve in July 2003 and May 2004,combined with the historical data,190 species of birds were recorded in the reserve,respectively. These birds belong to 13 orders,36 families and 107 genera,of which 16 species has been listed in Chinese National Key Protected Wild Animal Species and 12 species are of endemic to China.
Pollen morphology of 25 species of 8 sections of the genus Arisaema was studied by means of scanning electron microscope. In the 25 species, 12 species were examined for the first time, and 11 are endemic to China.
Elaeagnus mollis is an endemic to China,being one of the state protected two grade rare and endangered plants, and distributed mainly in hills and lower mountains in southern Shanxi and at the northern foot of Qinling Ranges in Shaanxi.
It mainly distributes in 29°～31°N and 118°～120°E of Tianmu mountain system matched between Zhejiang province and Anhui province. There are totally 70,000 farmers engaged in production and management of hickory, whose income occupied more than 70%.
91 species belonging to 62 genera,25 families and 7 orders of mammals were found there,and in which 5 species were listed in Appendix I,18 species listed in Appendix II of national"List of Natural Key Protected Animals",while 7 species listed as key-protected animals in Sichuan,25 species listed as profitable,important economy and science study value portected animals,and besides,29 species listed as peculiar animals in China.
Pedicularis tricolor H.-M. is a specific specie herbaceous biennial in china, and belongs to Scrophulariceae Pedicularis. P. tricolor rised from alp and lea, and boskage in northwestward of Yunnan with altitude at 3 400~3 700 m.
Interspecific relationships in a natural forest dominated by Pinus kwangtungensis, a rare and endangered pine species endemic to China, were studied based on inventory data from 7,200 m2 plots in Nanling National Nature Reserve.
All temperate elements, not including 14 endemic to China and 31 Cosmopolitans, were added up to 188 species, which took 88.3% of all the entire known bryoflora in Mt.
The Yangtze river boats are one of the special type of boats in our country.For many years our shipbuilders have gained much experience and success in the design and construction.Their general arrangements and hull structures,have been carefully studied,with special attention to the narrow waters,rushing current,curved course and beaches etc.of the river.So,an excellent type of Yangtze river boats of light weight,strong structure,small draft,large cargo capacity,good maneuverability and high speed is needed...
The Silurian trilobite-bearing rocks may be grouped into two units in Sichuan,Guizhou,Hubie,and Yunnan,southwestern China.The first unit includes the Xiang-shuyuan and the Leijiatun Formations belonging to the Lower Silurian.It is chara-cterized by Ptilillaenus Lu,Leiscutellum Wu,Shiqiania Chang,Gaotania Chang,Hy-paproetus Wu,Oidalaproetus Wu,etc.,with Ptilillaenus as the leading form.InHubie province,the Ptilillaenus-bearing rocks contain Glyptograptus incertus Ellesct Wood,G.linearis Rickards,Monograptus ...
本文主要论述以下几点:1)西南地区至今为止已发现的志留纪三叶虫大致有30多个属,80多个种。2)较集中产出于两个层位,一是下志留统的香树园组至雷家屯组或与其相当的层位。另一是中志留统的秀山组。前者以翼斜视虫Ptilillaenus 为代表,后者则是以王冠虫Coronocephalus 为主的三叶虫组合。3)这两个三叶虫动物群组合除个别属种外,多数为我国特有,和其共生的笔石、腕足类等有的可与国际对比。4)区别王冠虫属和似彗星虫属在本区及邻近地区志留纪地层对比有一定意义。前者仅见于中志留统的秀山组,后者在我国自晚奥陶世至晚志留世的地层中都有发现。5)滇东关底组的东方棘尾虫Acanthopyge orientalis Wu及玉龙寺组的Warburgella rugulosa (Alth) sinensis Wu 的发现为滇东志留泥盆系的划分和对比提供了重要的三叶虫化石依据。6)系统描述彗星虫科的一些新属种。
我国特有
endemic to china
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