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1.
通过对模式标本的考订,指出大苞茶的原始描述中关于子房特征的部分与模式标本的实际性状不符,对其形态特征进行了修订。基于修订后的形态特征,该"绝迹"物种在模式产地的周边地区被重新发现。  相似文献   

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通过查看模式标本和普通标本,对中国特有种——云南圆口藓进行了修订。据模式特征,重新订正了中国各地标本,确定本种分布在中国云南、辽宁和内蒙古,其中内蒙古为新分布区。除描述和讨论外,还就模式标本绘制了各种特征的解剖图,根据普通标本进行了显微拍照,以补现有文献形态描述和绘图的不足。  相似文献   

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本文通过对腾冲慈姑Sagittaria tengtsungensis 模式产地的考察,并在查阅了所有馆藏标本的基础上对腾冲慈姑的形态描述进行了修订。有关形态特征的比较以及不同的地理分布区等研究结果均支持腾冲慈姑和小慈姑为两个中国特有种的观点。  相似文献   

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极度濒危植物云南蓝果树的形态修订   总被引:2,自引:0,他引:2  
极度濒危植物云南蓝果树(Nyssa yunnanensis)是雄性两性异株植物,其发表时仅根据雄花模式和果模式。作者通过野外观察和标本研究,发现目前对其雄花描述不全或不准确且缺乏两性花的描述,故本文修订了其雄花形态的原始描述,并且补充描述了其两性花和果实的形态特征。  相似文献   

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坚瘿绵蚜属Ceratopemphigus Schouteden是一个单型属,记述了模式种Ceratopemphigus zehntneri Schouteden,1905的新型--无翅孤雌蚜,对属征进行了补充和修订.同时,提供了寄主植物、地理分布、形态特征图等信息.研究标本保存在英国自然历史博物馆.  相似文献   

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濒危植物都支杜鹃雄蕊数目描述的修正   总被引:2,自引:1,他引:1  
通过对都支杜鹃5个种群(包括模式产地)的雄蕊数目进行统计、对馆藏标本进行查询和对模式标本采集人进行采访,修正了现有文献对都支杜鹃雄蕊数目(一个关键鉴别特征)的描述——应是12~15枚,而非10枚;本文还对同地点栽培的都支杜鹃和云锦杜鹃的形态进行观察,发现都支杜鹃与云锦杜鹃诸多形态特征差异显著,支持都支杜鹃是一个独立的“好种”。  相似文献   

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宁南方竹和香竹两个竹种果实形态特征迄今未见正式报道;云南龙竹果实虽有报道,但形态描述与本文采集的种子标本差异较大,可能为竹种鉴定有误。本文根据在云南采集到的三个竹种的果实标本,对其特征进行了描述。研究结果将增进对竹子果实性状的认识,为今后竹亚科研究专著的修订工作提供更翔实的资料。  相似文献   

8.
10种刚竹属植物花部形态的补充描述   总被引:2,自引:0,他引:2  
首次补充和描述了黄古竹Phyllostachys angusta,乌芽竹P.atrovaginata,角竹P.fimbriligula,美竹P.mannii,早园竹P.propinqua,芽竹P.robustirames,水胖竹P.rubicunda,衢县红壳竹P.rutila,天目早竹P.tianmuensis,9种竹子的花部形态特征,并根据采得了可靠花枝标本对台湾桂 竹P.makinoi的花部形态特征作了增补和修订。  相似文献   

9.
陕西横山晚三叠世鱼类游泳遗迹化石新材料   总被引:3,自引:0,他引:3  
在多次赴化石产地陕西横山县进行大规模化石发掘后,获得一批完整精美的遗迹标本,为其中鱼类游泳遗迹化石标本建立了新种Undichna prava,并重新修订U.britannica,U.tricosta两种的特征,通过遗迹形态恢复鱼体长度为50—96cm,普遍大于以往描述的国内外据遗迹标本恢复的鱼体长度。  相似文献   

10.
小叶栒子的分类学研究   总被引:2,自引:0,他引:2  
据有关模式和产地标本的研究,结合野外调查、叶表皮微形态观察结果,对小叶栒子(Cotoneaster microphyllus Wall.ex Lindl.)进行了分类学修订,将分属 3系(Series Procumbens Klotz; Series Alpigeni和Series Marginati Klotz)的15个名称归并作小叶栒子的同物异名。  相似文献   

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Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.  相似文献   

16.
Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.  相似文献   

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Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.  相似文献   

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正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases  相似文献   

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