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1.
Herminium is a genus of about 26 species, mainly distributed in the temperate and subtropical regions of Asia and Europe.  Yunnan, Sichuan and Xizang in China are the pre- sent distribution centre as well as differentiation centre of the genus. In the present paper, taxa of Herminium hitherto recorded in China are taxonomically and phytogeographically discussed and revised, and, as a result, 18 species are recongnized, including two newly recorded spe- cies, H. angustilabre King et Pantl. and H. quinquelobum King et Pantl., and 12 species en- demic to China.  A full list of synonyms is given, a key to the species is provided and the distribution areas of all taxa are mapped.  相似文献   

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兰科的兜被兰属约有12种,主要分布于亚洲的温带至亚热带山地,我国的四川和云南是其现代分布中心和分化中心。本文通过植物地理学、孢粉学和解剖学的研究,对该属进行分类学订正,确认中国产有12种,其中9种为我国特有,包括4个新种和1个新组合种。  相似文献   

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 兜被兰属Neottianthe全世界共约12种,中国均有分布,其中9种为我国所特有。本属花粉形态 和组成都很特殊,它是由许多单粒花粉粘结在一起形成复合花粉——花粉小块,其形状一般为狭长的三 棱锥体形。外壁表面具5种纹饰类型:(A)近光滑,或具十分微弱的小凹陷;(B)外壁具穿孔状纹饰; (c)外壁具沟渠状纹饰;(D)外壁具拟网状纹饰;(E)具典型的网状纹饰。奉属有些种类,例如:N.cal- cicola,N.monophylla,N.pseudo-diphylax和N.cucullata等4种在分类上还存在许多问题,有些分类 学家把N.calcicola,N.monophylla,N.pseudo-diphylax 3种均归并于N.cucullata。孢粉学资料表 明上述4个种花粉特征完全不同,因此,上述4种仍应各自独立为种。最后,强调指出N.camptoceras的花粉形状和外壁纹饰等特征在本属为特殊类型。  相似文献   

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Apostasioideae, a small subfamily of Orchidaceae, is largely distributed in tropical Asia with its northern limit extending to the Ryukyu Islands and south China. The first Chinese species of this subfamily was reported by E. D. Merrill (1927) based on a specimen collected from Hainan (McClure 9519, AMES), which he regarded as Apostasia wallichii R. Br. As later labelled by E. F. de Vogel, it is in fact identical with A. odorata Bl., a widespread spe- cies also found in southern Guangdong, Guangxi and Yunnan of China.  It was not until re- cently that the true A. wallichii was collected from southwestern Yunnan bordering on Burma, which is initially reported here.  In addition, an interesting new species, A. ramifera S. C. Chen et K. Y. Lang, is described from Hainan.       The only Chinese species of Neuwiedia has long been known as N. veratrifolia Bl. (of. Iconographia Cormophytorum Sinicorum 5: 602, t. 8034. 1976, and Flora Hainanica 4 180, t. 1078. 1977), which, however, was considered by de Vogel (1969) to be not found in China.  In de Vogel's revision, no Chinese taxon but a variety, N. zollingeri Rchb. f. var. singapureana (Baker) de Vogel, is cited with some doubt based on a specimen of Hainan (F. C. How 73122, in young fruit, AMES). N. zollingeri var. singapureana is in fact quite different from N. veratrifolia by having glandular hair, much shorter inflorescence and flattened filaments.  As recently pointed out by de Vogel and G. Barretto (in Journ. Taiwan Museum 37: 78. 1984), the plants found in Hongkong, as well as those in Guangdong and Yunnan, possess glandular hair and short inflorescence. They are identical with the Vietnamese species N. balansae Gagnep., which was reduced by de Vogel to a synonym of N. zollingeri var singapureana. E. F. de Vogel's suggestion seems to be acceptable except the varietal rank.  It is treated here as a se- parate species, N. singapureana (Baker) Rolfe, according to its fruit and hair characters.  Thus we have altogether one species of Neuwiedia and three species of Apostasia in China, including a new species and a newly recorded one.  相似文献   

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中国柳属植物地理分布的研究   总被引:2,自引:0,他引:2  
本文研究了中国产柳属植物的分布,并探讨了该属的起源与演化问题。  我国产柳     属植物255种,约占全世界总数的46%,隶属于37个组,几乎包括了该属所有的进化类型。     因此,中国是世界柳属植物种数最多、类型最丰富的地区。青藏高原的出现,是形成这一分布     特点的重要原因。我国柳属植物主要分布在西北、东北和西南地区。西北地区是中亚分布区     的一部分; 东北地区是东北亚分布区的一部分; 它们又都有一些中欧-西伯利亚和北极-高山成     分。青藏高原与其他分布区间的联系很少,是柳属又一个重要的分布中心。作为泛北极植物 区系的典型属之一的柳属,可能起源于东南亚热带山区。  相似文献   

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报道了中国兰科植物一新记录种,黄花线柱兰Zeuxine flava (Wall. ex Lindl.) Benth. ex Hook. f.。本种的唇瓣橘黄色并呈“T”形,前唇裂片成方形,长宽近相等,唇瓣基部囊内各具一枚钩状胼胝体。  相似文献   

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本文根据标本记载新疆的兰科植物11属、16种,  其中5种为新疆新记录,3种为我国新记录。  相似文献   

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In this paper the classification of the genus  Bergenia Moench is  provided, its geographic distribution analysed, and the phylogeny also traced.   Based  on an analysis of morphological characters such as leaves, ocreas, branches of inflorescences, Pedicels, hypan- thium, sepals, and glandular indumentum, thi genus is divided into 3 sections: 1. Sect. Scopu- losae J. T. Pan, sect. nov., 2. Sect. Bergnia, 3. Sect. Ciliatae (A. Boriss.) J. T. Pan, stat. nov. The Sect. Scopulosae J. T. Pan may be considered as the primitive one, while Sect. Ciliatae (A. Boriss.) J. T. Pan may be regarded as the advanced one, with Sect. Bergenia in between.         So far, the genus Bergenia Moench comprises 9 species in the total.  Southeast Asia and North Asia (south and east Siberia, USSR) each have only 1 species, West Asia (Afghanis- tan) has 2, Central Asia (Kirghizia-Tajikistan-Uzbekstan area, USSR) 3, South Asia 4 (Nepal has 4, India, Pakistan and Kashmir area each has 3, Bhutan and Sikkim each has 2), East Asia 6.  In East Asia, Mongolia and Korea each have only 1 species, but China has 6 (includ- ing endemic species 2 and new species 1).  Sichuan Province and Xizang Autonomous Region each have 3, Yunnan Province 2, Shaanxi Province (Qinling Mountains) and Uygur Autono- mous Region of Xinjiang each have only 1.        Thus the distribution centre of this genus  should be in the region covering Si- chuan, Yunnan and Xizang. Moreover, it is noteworthy  that Bergenia scopulosa T. P. Wang in Sect. Scopulosae seems to have retained primitive characters,  for exa- mple, non-ciliate leaves and ocreas, glabrous pedicels, hypanthium and  sepals,  and this primitive species is found in Qinling Mountains and Sichuan.  According to the distribution of the primitive species, the author suggests that the centre of origin of  this genus be in the region covering Qinling Mountains and Sichuan.  相似文献   

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The genus Cephalotaxus contains a small number of species. It is adequately appreciated as a newly discovered cancerresistant medicament for the alkaloids obtai- ned from its branches leaves and barks are of curative effect.      This paper deals with the classificatory revision based on the morphological featu- res,  with the reference to the anatomical characters of leaves,  types of alkaloids and pollen morphology observed.  Two new combinations are proposed,  and 4 species and varieties are reduced in the paper. The genus Cephalotaxus is thus suggested to consist of 2 sections and 9 species.  The trees occur in East Asia and the north of Indo-China, with 88% found in China where is the distribution centre and refuge of the genus. The genus in discussion is of unique morphological features which are distinctly dif- ferent from these of Amentotaxus,  Cephalotaxaceae,  containing a single genus of Ce- phalotaxus,  is closely related to Taxaceae,  and therefore the Cephalotaxaceae is best placed in the Taxinieae of Coniferales.  相似文献   

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本文修订了鳞毛蕨属泡鳞亚属的特征范围,对该亚属的2个组12个种进行了分类研 究,发现其中有新种1个,云南新分布的种5个。本文还对长期混淆不清的Dryopteris labo-rdei与D.gymnosora 的分类特征还进行了清理,恢复前者为独立存在的种。  相似文献   

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中国毛茛科植物小志(十五)   总被引:1,自引:0,他引:1  
 在本文中澄清了一些错误鉴定;一些学名证实不能成立,成为异名;对偏翅唐松草的种下分类 群做出修订,并给出新的区别特征;做出锐棱铁线莲系的分种检索表;对渐尖铁线莲群各种的亲缘关 系进行了初步讨论;描述了1新系,3新种,3新变种,2新变型;做出1新组合,4新等级,并拟出1新名;报道了拳距瓜叶乌头、星果草和直梗高山唐松草的国外分布。  相似文献   

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本文以可收集到的标本,运用形象化散点图、柱状图等方法,对国产山梗菜亚属Subgen.Tupa E.Wimm.性状的变异幅度及相关性进行了统计分析,并结合花粉特征及种皮表面纹饰,对该亚属的国产种进行了修订,发现一新种(叶苞山梗菜L.foliiformis)一新亚种(贵州山梗菜L .colorata subsp.guizhouensis),同意廉永善对L .hybrida的处理,并把L .taliensis也归人L .colorata,将后者分为三个亚种。对于L .kwangsiensis我们的分析结果支持廉永善在《中国植物志》中的划分,给予降级,并置于L .davidii内。  相似文献   

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