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A taxonomic revision of Psathyrostachys (Poaceae)   总被引:1,自引:0,他引:1  
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The genus Calotropis of the tribe Asclepiadeae of Asclepiadaceae subfamily Ascle-piadoideae is revised throughout its Tange in tropical and subtropical Africa and Asia. The three species recognized are keyed out, illustrated and described with appropriate bibliography, synonymy, notes on ecology, distribution and uses. Distribution maps for the species are provided. The taxonomic position of the genus is discussed and a historical review is provided.  相似文献   

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《Journal of bryology》2013,35(4):697-732
Abstract

The fourteen species of Calymperes occurring in southern India and neighouring islands are described and their relationships discussed. Syrrhopodon subgenus Heliconema is raised to generic status and a nomenclatural account of its single Asian representative is provided (Heliconema peguense (Besch.) L. T. Ellis and A. Eddy).  相似文献   

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Seven of the 20 former species of the Phreodrilidae have been examined. Information derived from a study of this material has necessitated a re-assessment of the interpretations of some of the anatomical features formerly employed in the separation of genera. As a result, all of the known species are merged in the single genus Phreodrilus with seven subgenera, 17 species and two taxa recognizable only as unidentifiable phreodrilids.  相似文献   

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Fourteen native species of Linum are recognized in southern Africa, all of which belong to sect. Linopsis. Four are commonly accepted species; four were described more than a century ago but have not been recognized in recent treatments; six are newly described. Thirteen species are endemic; one ranges as far north as Angola and Tanzania. Among the new species two are heterostylous, the first described for the genus from this region.
The section Linopsis ranges broadly from the Mediterranean region to southern Africa and to both North and South America. The occurrence in the Mediterranean region of species exhibiting such features as heterostyly and chromosome numbers of 2n = 18 or 20, the only diploids known in the section, seems to indicate that in that region are to be found the most primitive species of the section. The close similarity between species of southern Africa and a number of South American and North American species appears to place the southern African species in an intermediate evolutionary position with respect to the Old and New World species of the section.  相似文献   

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云南产凤丫蕨属植物(裸子蕨科)的分类订正   总被引:3,自引:0,他引:3  
陆树刚 《广西植物》2001,21(1):37-42
订正了云南产的凤丫蕨属植物 ,承认云南产 1 3种和 2变种 ,其中 ,云南分布新记录 2种。文中处理了 1 4个新异名。属下分类群也进行了重要订正。  相似文献   

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A taxonomic revision of the family Haplotaxidae (Oligochaeta)   总被引:1,自引:0,他引:1  
The family Haplotaxidae is re-defined and the genera Pelodrilus, Heterochaetella and Adenodrilus are merged in the single genus Haplotaxis. Haplotaxis dubius and Haplotaxis ascaridoides are recognized as subspecies of Haplotaxis gordioides, and H. forbesi is regarded as synonymous with H. gordioides following a re-examination of the type material. The absence of the gizzard in H. smithii is reported for the first time, and the presence of both pairs of male pores in the same segment in H. violaceus is confirmed, the type material of both species having been examined. Pelodrilus monticola, P. tuberculatus and P. darlingensis are merged in Haplotaxis africanus (n. comb.), Pelodrilus aucklandicus is recognized as a synonym of H. hologynus hologynus (n. comb.), but P. bipapillatus is recognized as a subspecies of hologynus.  相似文献   

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对堇菜科三角车属(Rinorea Aubl.)及鳞隔堇属(Scyphellandra Thw.)的部分种类进行了修订, 认为鳞隔堇(Scyphellandra pierrei H.de Boiss.)实为(Scyphellandra virgata Thw.), 而短柄三角车(Rinorea sessilis (Lour.)O.Ktze.)实为(Rinorea longiraumosa (Kurz.)Craib)。文中引用邱园(Kew)的标本已在其后注明, 未注明者均藏于华南植物所标本馆(IBSC)  相似文献   

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Tetsuo Koyama 《Brittonia》1984,36(2):184-205
Heterosmilax, a small southeastern Asiatic genus in the Smilacaceae, comprises 11 species in two sections, includingH. micrandra, which is described as new from Hainan, China. These taxa are taxonomically discussed, described, illustrated, and a key is provided to differentiate them.  相似文献   

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As part of a recent revision of the genus Crambe , based on the morphological study of herbarium and cultivated material, the systematics of section Dendrocrambe DC. are reviewed here. Section Dendrocrambe (including monospecific section Rhipocrambe Svent.) is considered to comprise 14 species, all endemic to Macaronesian archipelagoes: 13 in the Canary Islands and one in the Madeira Islands. Crambe feuilleei A. Santos and C. gomerae subsp. hirsuta Prina are described here, C. fruticosa subsp. pinnatifida (Lowe) Prina & Mart.-Laborde is proposed as a new status, and a key for the identification of all taxa, as well as maps with localities of collection, are provided.  © 2008 The Linnean Society of London, Botanical Journal of the Linnean Society, 2008, 156 , 291–304.  相似文献   

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Several taxa have previously been recognized within Secale , but most of them are difficult or even impossible to distinguish morphologically. We recognize only three species: S. sylvestre, S. strictum , and S. cereale. Secale strictum has priority over S. montanum and has two subspecies, ssp. strictum and ssp. africanum , and two varieties within ssp. strictum , van strictum and var. ciliatoglume comb. nov. Secale cereale is also treated as having two subspecies. The cultivated taxa, marked by their tough rachises, are placed in ssp. cereale and the wild or weedy taxa that have more or less fragile rachis, in ssp. ancestrale. A complete synonymy is given for S. cereale , but typification has been omitted because, in many instances, type material does not exist or has been impossible to trace.  相似文献   

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The taxonomy of South-East Asian mouse-deer ( Tragulus ) is complex, and after some 120 years of considerable taxonomic revisions of the genus a clear key is still lacking for the determination of species and subspecies. Through craniometrical analysis of 338 skulls of Tragulus and some study of coat coloration patterns we have come to a better understanding of mouse-deer taxonomy. Our results show that there are three species groups: the T. javanicus -group, the T. napu -group, and T. versicolor . Within the T. javanicus -group we recognize three species: T. javanicus (from Java), T. williamsoni (from northern Thailand and possibly southern China), and T. kanchil (from the rest of the range), and within these species we provisionally recognize 16 subspecies. Within the T. napu -group we recognize two species: T. nigricans (from Balabac), and T. napu (from the rest of the range); within these species we provisionally recognize eight subspecies. T. versicolor from Nhatrang, south-east Vietnam, is distinct from the two previous groups; it is, however, unclear whether this species is still extant.  © 2004 The Linnean Society of London, Zoological Journal of the Linnean Society , 2004, 140 , 63–102.  相似文献   

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