共查询到19条相似文献,搜索用时 46 毫秒
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笔者近年来在编研广西单子叶植物志棕榈科过程中,对我所历年来收集到的馆藏标本及文献资料进行全面研究,订正,发现广西的棕榈科植物种类相当丰富,野生和主要栽培的一起,计有22属,约50种,占全国总种数的近1/2,与广东所产的种数近相等。在园艺上享有很高声誉的国外种,例如王棕、假槟榔、散尾葵、金山葵等,广西南部及东南部普遍栽培;热带著名水果海枣及椰子和油料植物油棕等,广西亦有引种。经济价值高的野生种类为数也不少,颇受园艺界青睐的棕竹类,全国有5种,广西全产,而且广布于全区各地,产量大宗;濒危植物棕,在广西西南部及西部的石山区成片生长,长势旺盛,姿态优雅,构成独特景观,十分引人注目。本文报道研究结果的一部分,共记载8个属,25个种,并有广西产各属的分属检索表。 相似文献
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薯蓣科我国仅有薯蓣一属,约50种,主产西南部至东南部及南部,西北及北部较少。广西的本属植物含27种以上,占全国总种数的一半强。种类虽然不算多,但经济价值大,有的种类块茎或根状茎作蔬食,有健脾胃、益肺、肾等功能,如大薯、甜薯、淮山和各种野生淮山等便是;有的种类含薯蓣皂甙和薯蓣毒皂甙,是制药工业的重要原料,在国民经济发展中占一定的地位,历来为世人所关注。本文是广西单子叶植物志薯蓣科分类研究结果,报道22个种和2个变种,除了有分种检索表外,还有分种简述,以便利用。 相似文献
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本文在简述广西杜鹃花属分类研究历史的基础上,对其作了全面修订,着重讨论了其中14种(变种)的分类存在问题,并对该属在广西境内的地理分布规律也作了初步的探讨。 相似文献
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李卫民;张福良;孟宪纾;高英 《武汉植物学研究》1992,10(2):182-184
百合科是单子叶植物的进化主干。百合科的分类专家汪发缵教授曾说过:“凡不能确定隶属于何科的单子叶植物,就可放于百合科中”。这虽似戏言,但若能体会其真意,就不难看出百合科的分类复杂性。本文随机取已发表在杂志上的百合科8个属的某些植物纲胞学数据进行聚类分析,拟从细胞分类的角度来验证形态分类的可靠性,并探索细胞分类的方法。聚类分析方法是数 相似文献
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内蒙古肋柱花属植物分类及其地理分布研究 总被引:1,自引:0,他引:1
确认了内蒙古地区有肋柱花属植物有3 种1 变种;其中发现了1 个新变种-橙黄肋柱花(Lomatogonium rotatum (L.)Fries ex Fern.var.aurantiacum Y.Z.Zhao)和1 个新种组合-短萼肋柱花(L.floribundum (Franch.)Y.Z.Zhao);编制了新的分种检索表;确定了它们的植物系地理成份。 相似文献
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棕头鸦雀的分类有过几次较为系统的整理研究。因其飞羽外缘有栗红色与褐色两种类型,前者又可分为红胸、灰胸两类群,故在分类上各学者持有不同意见。或将其分为3个种,或归并为1种。本文依据作者工作结果,从地理分布、形态及骨骼性状进行分析研究,认为棕头鸦雀具栗红翅缘的红胸、灰胸两类群在中国西南地区的云、贵、川三省的亚种分布接触地带彼此混交并有居间个体,不应独立为两个不同种。栗红翅缘褐色翅缘两大类群尚未发现重叠分布,形态明显间断,一直未见有中间类型。两大类群在头骨的泪骨突起和方骨形态上有明显差异,建议将它们分为Paradoxornis webbianus和paradoxornis brunneus。前者再分为红胸、灰胸两亚种组。对少数有争议的亚种也提出了处理意见。 相似文献
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百合科胡麻花属(Heloniopsis)的植物以前在中国大陆未曾报道,胡麻花(Heloniopsis umbellata Baker)确属百合科在中国大陆的1个新分布种,此次为首次报道。 相似文献
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Phillip C. Watts David O’Leary Mary C. Cross Jamie Coughlan Eileen Dillane Suzanne M. Kay Suzanne Wylde René Stet Richard D. M. Nash Emma M. C. Hatfield Thomas F. Cross 《Hydrobiologia》2008,606(1):27-33
Porifera is a primarily marine phylum comprising more than 15,000 species. The successful and wide adaptive radiation of freshwater
sponges (Haplosclerida: Spongillina) has resulted in the colonization of an extremely wide variety of habitats at all latitudes.
Colonization is dated back to the Mesozoic, and the mono- or poly-phyletism of Spongillina, and the number of potential sponge
invasions into freshwater is still under debate. Living freshwater sponges belong to 45 genera in six families for a total
of 219 species. The highest diversity, at the scale of zoogeographic regions, is recorded from the Neotropical (65 species),
Palaearctic (59 species), and Afrotropical regions (49 species). Endemic freshwater sponge species are 103 (47%) out of 219.
All species belonging to the families Lubomirskiidae, Metschnikowiidae, and Malawispongiidae are endemic. Endemic species
among the other families are 72% for Potamolepidae, 38% for Spongillidae, and 32% for Metaniidae. Data on some wide geographic
areas are scattered and fragmentary if not almost completely lacking. Species richness is probably underestimated and doubtless
destined to increase with further research.
Guest editors: E. V. Balian, C. Lévêque, H. Segers & K. Martens
Freshwater Animal Diversity Assessment 相似文献
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The glucosylation of convallatoxin and convallatoxol was investigated using homogenates and various subcellular fractions from leaves of Convallaria majalis. The enzyme activity reached a maximum about 5 weeks after the onset of flowering and was found distributed among the soluble and the light membrane fraction. Upon separation of the light membranes by sucrose density gradient centrifugation, glucosyltransferase activity was found solely in a fraction banding at a density of 1.07 g/cm3, which is thought to represent vacuole membranes. 相似文献
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Zhao Shi-Dong 《植物分类学报:英文版》1987,25(2):114-124
The distribution of willows in China is studied in this paper. The originof this genus and its distribution in the world are also discussed. There are 255 species ofwillows in China, taking up 46% of the total number of species of this genus in the world.They belong to 37 sections, which represent almost all forms. China is therefore the richestarea in species and sections of willows in the world. This is mostly caused by the upliftingof Qinghai-Xizang (Tibet) plateau. The willows in China are mainly distributed in northwestern, northeastern and southwestern regions. The northwest is a part of central Asian flora.The northeast is a part of northeastern Asian flora. They both have some of the Europe-Siberia and Arctic-Alpine elements. Qinghai-Xizang plateau is another important distributioncenter of willows, which has no close relation with other floristic regions. As one of typicalgenera of the Holarctic flora, Salix has probably originated in the tropical mountains of Southeast Asia. 相似文献
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《Animal cells and systems.》2012,16(2):305-311
Dermaptera was investigated, examined and reviewed in taxonomy and for distribution in Youngnam region. Based on the data, the local species groups were measured to choose priority‐conservation‐area by taxonomic root weighting and distribution analysis at 232 geographical conservation units. Eleven species belonging to 4 families and 8 genera were recorded mounting up to 68.75% of species diversity known in Korea. Found remarkably were the rare and endangered Challia fletcheri Burr at Sobaek Mountain National Park, and unusually Anisolabis marítima (Bonelli) in Taegu, Euborellia pallipes (Shiraki) at Island Geoje and E. plebeja (Dohrn) at Hwanho near Pohang. The highest species diversity was found at the temple Huibang area at Sobaek Mountain National Park with 8 species, which was measured also as the primary priority‐conservation‐area with 83.41% of accumulated taxonomic root weighting indices in percentage. Geoje and Hwanho both measured as 12.18% of accumulated taxonomic root weighting index in percentage and complimentary to Sobaek Mountain National Park but supporting 5 and 3 species, respectively. The priority goes to the geographical conservation unit supporting higher species richness between two geographical conservation units in comparison. By the rule, the second priority‐conservation‐area should be Geoje and the third Hwanho. It is, thus, demonstrated how 11 species can be all conserved by choosing 3 priority‐conservation‐areas out of 232 geographical conservation units to maintain maximum species in minimum areas. 相似文献
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海河流域61种植物磷元素化学特征及地理分异 总被引:5,自引:0,他引:5
海河流域61种植物磷元素化学特征及地理分异的分析结果表明:滨蒿(Artemisiascoparia)含磷量最高,达0.212%,浮萍(Lemnaminor)最低,只有0.043%;玉米(Zeamays)、高粱(Sorghumvulgare)、谷子(Panicummiliaceum)、水稻(Oryzasativa)、小麦(Triticumaestivum)、莜麦(Avenanuda)等谷物含磷量<0.200%,低于作物正常含量水平,反应了土壤缺磷特点。各类植物含磷量大小为:盐生植物>天然草本植物>农作物>蔬菜>落叶阔叶树>灌木半灌木>果树>针叶树>水生植物(P<0.05)。农作物各器官部位以果实含磷量最高达0.234%,其次是叶0.161%和茎0.111%,根最低,只有0.084%,这种结果造成土壤有效磷因收获而亏损。不同支流域植物磷的地理分布规律表现为:滹沱河流域>永定河流域>漳卫河流域>潮白河流域>大清河流域(P<0.05)。土壤中含磷量相对较低,以及盐碱土pH较高,不利于植物吸收磷,造成植物磷营养元素相对缺乏 相似文献
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Ronald F. Myers 《Journal of nematology》1986,18(2):272-274