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The present paper deals with the genus Paeonia in Xinjiang, whose taxonomy has
been confused. Based on the field observation, population sampling and the examination of
herbarium specimens, a taxonomical revision is made in this paper. Two species are recog-
nized, i. e. Paeonia anomala L. and P. sinjiangensis K. Y. Pan. P. altaica K. M. Dai
et T. H. Ying is reduced to P. sinjiangensis and P. hybrida (= P. anomala var.
intermedia) is reduced to P. anomala. The diagnostic characters of the two species are de-
scribed and illustrated, and a map of their distribution in Xinjiang is presented. A key to
these two species is provided here.
1. Roots straight, not thickened; sepals all caudate, less frequently one or very rarely two
non-caudate ................................................ 1. P. sinjiangensis K. Y. Pan.
2. Roots fusiform or tuberous; inner three sepals non-caudate, less frequently one of them
caudate .............................................................. 2. P. anomala L.
key words Xinjiang; Paeonia; P. anomala; P. sinjiangensis; revision 相似文献
2.
李学禹 《中国科教创新导刊》2008,(27)
本文结合学校体育教学的目标,探讨了在素质教育的理念下,中学体育教学几方面的发展趋势,指出了学校体育要以运动技术教育为主的教育模式转向以强身育人、快乐身心、增强身心健康的终身体育教育,以实现中学体育的健康发展和中学生的全面发展。 相似文献
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现代建筑中混凝土质量问题决定了建筑物的使用性,如果混凝土质量得不到有效的控制,将会造成难以弥补的安全隐患。给工程建设和人民的生命财产安全带来不可估量的损失。因此混凝土质量控制尤为重要。 相似文献
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近年来国内外大地震频频发生,尤其是2008年的四川汶川大地震,2010年1月、2月份发生的智利和海地地震,它再一次向人们敲响了警钟,为尽可能的避免或减少地震造成的人员伤亡和财产损失.建筑施工中有必要加强抗震设防意识. 相似文献
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Owing to the diagnostic characters used for distinguishing Lespedeza bicolor Turcz. from its allies L. formosa (Vogel) Koehne and L. elliptica Benth. ex Maxim. etc. beiny totally quantitative, and the great variability found in themselver as well, the group is therefore regarded as a taxonomically perplexing one. Therefore quantitative measurements of the diagnostic characters, namely, the lengths of flowers (including standards and keels) and calyces (including calyx teeth and tubes) upon the total 307 herbarium sheets collected from 22 provinces and autonomous regions were made, and the data obtained were treated statistically (Table 1) and compared using methods of scatter diagram (Fig. 1--5),polygraph (Fig. 6) and topoclinal variation (Fig. 7--10) in order to bring to light the differentiation pattern of these characters correlated to geographical distribution.
The diagrams of topoclinal variation (Fig. 7--10) of single characters represented by the lengths of calyx-teeth and corolla, or the calyx-teeth/calyx-tube ratio, between which exists a strong positive correlation, show a tendency of increasing gradation from northeast towards south-west. But the different combinations of morphological characters as shown in the scatter diagrams and more particularly in the polygraphs, make it possible to divide the Lespedeza bicolor group into the following three geographical types: (1) Bicolor type, with the distributional area of four provinces and one autonomous region of north-eastern and northern China; having the shortest (shorter than the calyx-rube) calyx-teeth of the whole group; with the standards of 71% herbarium materials exceeding the keels; the corolla length/calyx length ratio being 2.24; (2) Formosa type, with the distributional area covering six provinces and one autonomous region of eastern, south-eastern and southern China; with calyx-teeth nearly as long as calyx-tuges; with the keels of 69% herbarium sheets exceeding the standards, including all from whole Guangdong (Kwantung) and Guangxi (Kwansi); the corolla length/calyx length ratio being 2.59, the largest among the group;
(3) Elliptica type, with the largest distributional area occupying ten provinces of south
western, central, northwestern and eastern China and with most complicated morphologi-
cal variation; the range of calyx-teeth length being 1.23--5.53 mm; with the keels of 80% herbarium sheets exceeding the standards, including all from whole Hubei (Hupeh) and Sichuan ( Szechuan ). Since the above geographical types are either transitional or overlapping, it is probably appropriate to regard them as different geographical subspecies of a single species Lespedeza bicolor Turcz. Taxonomic treatments are then made herewith. A comparison of the main diagnostic characters and distributional patterns of the three subspecies in question is given in Table 3. 相似文献
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<正>一、取之于生,用之于生在课题实施的初始阶段,课题组首先对全体师生发放了问卷,发动学生参与,调动学生群体的创造热情;然后,进行综合、加工、提升,同时,整理并在体育课中反复实践了几十种可行性游戏,并再次"返还"给学生进行筛 相似文献
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