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 共查询到19条相似文献,搜索用时 124 毫秒
1.
王文采   《广西植物》1995,15(2):97-105
在对有关形态特征进行分析之后.作者发现具三浅裂或三深裂基生叶,和较薄、脱落萼片的脱萼鸦跖花是鸦跖花属的原始种,而具五角形,三深裂基生叶的变叶三裂碱毛莨和裂叶碱毛莨是碱毛莨属的原始分类群.写出新修订的我国碱毛莨属属下分类群检索表;作者认为聚合果的形状是碱毛莨属的重要特征,并用来将此属的种分为二群,描述了碱毛莨属2新组,2新变种,水毛莨属1新变种.做出碱毛莨属2新组合报导了水毛莨属二种的新分布。  相似文献   

2.
国产毛莨属11种及其4个近缘属5种植物的细胞学研究   总被引:3,自引:0,他引:3  
研究了国产毛莨属RanunculusL.11种及其4个远缘属-美花草属CollianthemunC.A.Meyer,侧金盏花属AdonisL.、碱毛莨属Halerpestes E.Greene,水毛莨属BatrachiumS.F.Gray5种植物的洒色体数目和形态。发现美花草C.pinpinelloides(D.Don)Hook.f.et THoms.,川滇毛莨R.potaninii Kom.,深齿毛莨R.popovii var.stracheyanus(Maxim.)W.T.Wang,高原毛莨R.tanguticus(Maxim.)Ovcx., 石龙芮R.sceleratusL.,西南毛莨R.ficariifolius Levl.et Vant.、褐鞘毛莨R.sinovaginatus W.T.Wang、三裂碱毛莨H.tricuspis(Maxim.)Hand.-Mazz.和碱毛莨H.sarmentosa(Adams)Kom.9种植物为染色体基数x=8的四倍体(2n=4x=32);短注侧金盏花A.brevistyla Franch.、丝叶毛莨R.nematolobus Hand.-Mass.、棱喙毛莨3R.trigonus Hand.-Mazz.、 茴茴蒜R.chinensis Bunge4种植物为染色体基数x=8的二倍体(2n=2x=16);毛莨R.japonicus Thunb.、黄毛莨R.laetus Wall.2种植物为染色体基数x=7的二倍体(2n=2x=14);水毛莨B.bungei(Steud.)L.Liou有二倍体(2n=2x=16)和三倍体(2n=3x=24)两种细胞型。根据染体资料,讨论了上述5属的属间关系和毛莨属中一些种的种间关系。  相似文献   

3.
张贵一  王巨  刘祥君 《植物研究》1992,12(3):241-242
本文发表了产于东北的水毛莨属一新种, 即镜泊毛莨Batrachium jingponse G.Y.Chang C.Wang.et X.J.Liu.  相似文献   

4.
廖亮 《植物研究》1992,12(4):376-376
本文发表了毛莨属一新变种, 即三叶毛莨Ranunculus japonicus Thunb.var.ternatifolius L.Liao, var.nov.  相似文献   

5.
湖南紫菀属(菊科)一新变种--垂茎三脉紫菀   总被引:1,自引:0,他引:1  
报道了湖南紫菀属Aster一新变种——垂茎三脉紫菀A.ageratoides var.pendulus W.P.Li&G X.Chen。新变种与宽伞三蔓脉紫菀A.ageratoides var.laticorymbus(Vant.)Hand.-Mazz.最为接近,但以如下特征与之相区别:茎下垂,基生叶和茎下部叶背面常为紫色,茎生叶常条形,叶上面被糙毛,总苞片较宽。新变种因叶常条形和舌状花白色而与小花三脉紫菀A.ageratoides var.microanthus Ling相似,但总苞片顶端旱绿色,1.25-1.75mm宽,具明显横走地下茎而不同。  相似文献   

6.
内蒙古毛莨属的分类研究   总被引:1,自引:1,他引:0  
赵一之 《植物研究》1989,9(1):61-72
本文记载了内蒙古境内毛莨属植物23种、1变,种比1978年出版的"内蒙古植物志"第二卷增加了13种、1变种,其中发现新种2个——R.alaschanicus Y.Z.Zhao和R.int-ramongolicus Y.Z.Zhao,新种组合1个——R.yinshanensis(Y.Z.Zhao)Y.Z.Zhao,内蒙古分布新记录4个——R.popovii Ovcz.、R.brotherusii Freyn、R.tanguticus(Maxim.)Ovcz、R.submarginatus Ovcz.。  相似文献   

7.
九种金花茶种皮的电镜扫描观察   总被引:3,自引:1,他引:2  
张文驹  闵天禄   《广西植物》1995,15(1):36-38+98
通过对山茶属9种(变种)金花茶的种皮所进行的电镜扫描观察,发现种皮外表面具有网格伏雕纹是9个种及变种的共同特征;除Camelliavar.tunghinensis外,其余的种都被毛.毛的长短、多少及网格的大小、形状具有一定的分类意义。结果支持本文作者根据外部形态对该类群的部分订正工作。  相似文献   

8.
朱强  李志刚  宋景景  王俊 《西北植物学报》2011,31(10):2129-2130
描述了龙胆属(Gentiana)假水生龙胆(G.pseudo-aquaticaKusnez.)的一个新变种即白花假水生龙胆(G.pseudo-aquaticaKusnez.var.albifloraQ.Zhu)。该变种与原变种的区别在于变种的花冠白色,喉部具黄色条纹,茎叶黄绿色,节间较长,基生叶较大。  相似文献   

9.
我国西南小奥德蘑属的分类   总被引:10,自引:1,他引:9  
杨祝良  臧穆 《真菌学报》1993,12(1):16-27
在研究了我国西南地区(滇、黔、川、藏)小奥德蘑属Oudemansiella的标本后,作者认为Pegler et Young(1986)所提出的本属的分类系统较为合理。本文报道该属10种4变种,其中3新种、1新变种和1新组合。新分类群是云南小奥德蘑Oudemansiella yunnanensis Z.L.Yang et Zang、粘小奥德蘑假根变种Oudemansiella mucida(Schr  相似文献   

10.
王文采 《广西植物》2021,41(Z1):1-118
该文对中国毛茛科银莲花属(Anemone L.)进行了分类学研究,共收载86 种,可将这些种划分为10 组:其中5 组,即草玉梅组、西南银莲花组、钝裂银莲花组、短柱银莲花组和直果银莲花组均是该属具中等演 化水平的分类群;另外5 组,即银莲花组、鹅掌草组、卵叶银莲花组、二岐银莲花组和打破碗花花组则均是具 高度演化水平的分类群。 在这10 组中,钝裂银莲花组与银莲花组有相近的亲缘关系,短柱银莲花组与鹅掌 草组有相近的亲缘关系,而其余6 组之间的亲缘关系情况,目前尚未了解。 该文写出了区别所有属下分类 群的检索表、所有分类群的文献引证和地理分布,并对每一种均指出了研究的重要标本,对多数种均提供插 图。 描述了2 新组(短柱银莲花组和直果银莲花组)、4 新系(鹅掌草组的鹤峰银莲花系和加查银莲花系,以 及直果银莲花组的兴义银莲花系和直果银莲花系)、13 新种(九龙银莲花、柏枝山银莲花、狭萼银莲花、道孚 银莲花、泸定银莲花、波密银莲花、嘎隆拉山银莲花、三小叶银莲花、折多山银莲花、宝兴银莲花、贡嘎银莲 花、福贡银莲花和盘蕊银莲花)、1 新亚种(长柄钝裂银莲花)以及4 新变种(紫萼折多山银莲花、矮展毛银莲 花、疏毛川西银莲花和泸水银莲花)。 此外,还将变种条叶银莲花提升为种级分类群;将涪陵银莲花降级作 为川西银莲花的一个变种;由于Anemone rupestris Hook. f. & Thoms. 为一不合法的晚出异物同名,遂拟出一 新名(Anemone neorupestris W. T. Wang);小花草玉梅在过去多年间被处理为草玉梅的一个变种,在该文中其 原来种级群的地位得到恢复;1939 年,H. Handel ̄Mazzetti 将变种云南银莲花归并于展毛银莲花,将稀果银莲 花归并于滇川银莲花,对此二归并,该文赞同并采用。  相似文献   

11.
本文描述了 8种国产毛茛科植物的地理分布新资料 ,并且在分类学上将铁线莲属锈花铁线莲毛变种归并入原变种。  相似文献   

12.
Teucrium creticum L. and T. orientale L. var. orientale are two related taxa in Teucrium sect. Teucrium . In this study, the value of anatomical and micromorphological characters for distinguishing between these two taxa is analysed. Transverse sections of the stem, as well as both transverse and surface sections of the leaves were examined anatomically. According to the data obtained, collenchyma and sclerenchyma do grow more in T. creticum than in T. orientale var. orientale . The leaves of T. creticum are hypostomatic and have a characteristic hypodermis, which is under the upper epidermis, as well as abundant spherocrystals in the upper epidermis. The leaves of T. orientale var. orientale are amphistomatic, yet no spherocristals exists in epidermal cells and the hypodermis is absent. The results obtained from studies carried out under scanning electron microscope (SEM) shows that the nutlet micromorphology varies between the two taxa. In both taxa, the nutlet surfaces are reticulate and glandular. Eglandular hairs do occur. However, in T. orientale var. orientale , 20–60 μm long eglandular hairs with scabrid surface occur only along the margins of the nutlets, whereas the ¾ dorsal sides of the nutlets in T. creticum are all covered with 90–500 μm long, smooth-surfaced hairs. Additionally, while the glandular hairs on the nutlets of T. creticum are subsessile, those on the nutlets of T. orientale var. orientale are capitate and distinctly stalked.  相似文献   

13.
Ranunculus is a large genus with a worldwide distribution. Phylogenetic analyses of c. 200 species of Ranunculus s.l. based on sequences of the nrITS using maximum parsimony and Bayesian inference yielded high congruence with previous cpDNA restriction site analyses, but strongly contradict previous classifications. A large core clade including Ranunculus subg. Ranunculus, subg. Batrachium, subg. Crymodes p.p., Ceratocephala, Myosurus, and Aphanostemma is separated from R. subg. Ficaria, subg. Pallasiantha, subg. Coptidium, subg. Crymodes p.p., Halerpestes, Peltocalathos, Callianthemoides, and Arcteranthis. Within the core clade, 19 clades can be described with morphological and karyological features. Several sections are not monophyletic. Parallel evolution of morphological characters in adaptation to climatic conditions may be a reason for incongruence of molecular data and morphology-based classifications. In some mountainous regions, groups of closely related species may have originated from adaptive radiation and rapid speciation. Split decomposition analysis indicated complex patterns of relationship and suggested hybridization in the apomictic R. auricomus complex, R. subg. Batrachium, and the white-flowering European alpines. The evolutionary success of the genus might be due to a combination of morphological plasticity and adaptations, hybridization and polyploidy as important factors for regional diversification, and a broad range of reproductive strategies.  相似文献   

14.
DIOSDADO. J. C, PASTOR, J. E. & VALDÉS, B. 1993. Contributions to the karyological study of the genus Ranunculus L. subgenus Batrachium (DC.) A. Gray from the Iberian Peninsula. The somatic and gametic chromosome numbers and detailed chromosome morphology are presented for eight taxa of aquatic ranunculi from the Iberian Peninsula. Within the subgenus Batrachium diploid and tetraploid levels have been observed (2 n = 16, 32) the commoner of which is the diploid. From the karyological data relationships have been established between the subgenus Batrachium and subgenus Ranunculus.  相似文献   

15.
Glucosinolate content of leaves and roots, diversity in leaf pubescence, and resistance to two near-isogenic lines of the flea beetle Phyllotreta nemorum with or without an R-gene, were determined for 27 accessions of 7 Barbarea taxa, i.e. B. stricta, B. orthoceras, B. intermedia, B. verna, B. vulgaris var. vulgaris, the G-type of B. vulgaris var. arcuata and the P-type of B. vulgaris var. arcuata. Four variable glucosinolate biosynthetic characters were deduced. For (formally) homophenylalanine-derived glucosinolates: (1). Presence or absence of 2-hydroxylation, and if present, R- or S-configuration of 2-hydroxylation; (2). presence or absence of p-hydroxylation; and for tryptophan-derived glucosinolates: (3). presence or absence of N-methoxyglucobrassicin; and (4). presence or absence of 1,4-dimethoxyglucobrassicin. Three phenotypes of leaf-pubescence were observed; (1). glabrous to glabrate leaves; (2). glabrous to glabrate leaves with hairs along the edge; (3). pubescent leaves. The hairs were characterized as simple by scanning electron microscopy. Full resistance to a flea beetle line (ST) was found in B. vulgaris var. vulgaris and in the G-type of var. arcuata; partial resistance was found in B. verna and B. intermedia, while the remaining taxa were fully susceptible to the ST line. All investigated Barbarea taxa were susceptible to larvae from another line containing an R-gene, indicating a similar flea beetle resistance mechanism in the three resistant species. Most Barbarea taxa could be characterized by a particular combination of the investigated characters. The most aberrant was the P-type of B. vulgaris var. arcuata, and the taxonomic status of this type should be reconsidered.  相似文献   

16.
报道假糙苏属(Paraphlomis)植物在中国广西2个新分类群和2个新记录种.2个新分类群是翅柄假糙苏(P.javanica(Blume)Prain var.pteropoda D.Fang & K. J.Yan)和白脉狭叶假糙苏(P.javanica(Blume)Prain var.angustifolia (C.Y. Wu)C.Y.Wu&H. W.Li f.albinervia D.Fang & K J.Yan).2个新记录种是刚毛假糙苏(P.hispida C.Y.Wu)和近革叶假糙苏(P.subcoriacea C.Y Wu ex H. W.Li).  相似文献   

17.
中国兰科杓兰属一新种及一新变种   总被引:1,自引:1,他引:0  
对云南东南部兰科新种麻栗坡杓兰(Cypripodium,malipoense)和新变种大围山杓兰(Cypripedium lichiangense var.datveishanense)作了描述。麻栗坡杓兰与文山杓兰(C.lentiginosum)相近,区别点在于新种叶淡黄色而有紫斑,色泽与花瓣及唇瓣极为相似;花瓣明显较短,仅稍长于唇瓣。新变种大围山杓兰与原变种的不同在于中萼片黄绿色,疏生紫红色斑点;花瓣仅稍长于唇瓣;唇瓣囊口有一黑色圈。  相似文献   

18.
Two new orchid taxa, Paphiopedilum globulosum Z. J. Liu et S. C. Chen and Paphiopedilum micranthum Tang et Wang var. oblatum Z. J. Liu et J. Y. Zhang, are described and illustrated based on cultivated plants originating in southeastern Yunnan. Both of them are related to Paphiopdilum micranthum Tang et Wang, from which the former differs by having much broader leaves 2.8 ~ 3.4 cm wide, a somewhat hooked-tipped lip 1.1 ~ 1.2 cm wide, and a staminode al-most as big as the mouth of the lip, and the latter by broader leaves 2.2 ~ 3 cm wide and an oblate lip at a depth of no more than 1 cm. They all belong to the subgenus Brachypetalum (s. l. ). A key to 16 Chinese and Vietnamese species of this subgenus is provided.  相似文献   

19.
《Journal of bryology》2013,35(4):269-272
Abstract

Ten taxa of Pottiaceae considered endemic to North Africa have been studied and typified. Nine are newly synonymized with other well-known taxa. A new combination is proposed: Weissia condensa var. armata (Thér. & Trab.) M.J.Cano, Ros & J.Guerra. The distribution of Acaulon triquetrum var. desertorum (Besch.) Jelenc and Weissia condensa var. armata are respectively extended to Europe and the African continent. Barbula muralis var. obovata Schimp. is a misprint in the publication of the taxon. Two nomina nuda, Tortula cuneifolia var. caulescens Jelenc and Tortula cuneifolia var. pilifera Jelenc have no taxonomic value.  相似文献   

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