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1.
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       下载免费PDF全文
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   

2.
宋晓卿  陆树刚 《广西植物》2010,30(4):451-454
在《中国植物志》和《云南植物志》的基础上,对云南产凤尾蕨属植物进行新的分类修订。文中澄清了8个混淆类群,其中新等级1种,即高原凤尾蕨Pteriscuspigera(Chingex Ching et S.H.Wu)X.Q.Song;云南分布新记录1种,即假指状凤尾蕨Pteris psudodactylina Ching et S.K.Wu;新异名3个,即Pteris asperi-caulis var.cuspigera Chingex Ching et S.H.Wu,Pteris inaequalis Bak.及Pteris wallichiana var.yunnanensis(Christ)Ching et S.H.Wu。还列出了新修订种类的文献引证、标本引证、生境和地理分布。经该文研究确认,现知云南有该属植物48种。  相似文献   

3.
云南扁担杆属植物计有14种3变种,本文对其中9种1变种作了分类学评注,并确认中国新记录2种,云南新记录1种,新组合1变种及新异名6个。  相似文献   

4.
云南植物区系   总被引:20,自引:5,他引:15  
云南具有丰富的植物区系,现知种子植物240科(裸子植物10科,被子植物230科),1,984属,约13,000种。无论从那一派分类学家的系统或观点来说,云南都有众多的古老或原始的科属。从云南种子植物属15个分布区类型比较分析,云南区系明显是热带性质并且具有丰富的温带成分,热带的属占云南总属数(不包括世界分布属,下同)61.89%,温带的属却占32.19%。中国特有属在云南分布约有83属,占云南总属数4.39%,并占中国特有属224个的37.05%。中国特有属的三个分布中心,有二个部分地分别在云南境内,即滇西北(新特有属中心)和滇东南(古老特有属中心)。云南本身的特有属有:爵床科的宽丝爵床(Haplanthoides),苦苣苔科的翼柱苣苔(Beciopsis)、毛药苣苔(Dasydesmus)、细筒苣苔(Lagarosolen),唇形科的龙老根(Skapanthus),茜草科的丁茜(Trailliaeodoxa)及伞形科的滇细叶芹(Chaerophyllopsis)和昆明芹(Sinodielsia)。  相似文献   

5.
云南森林植物区系研究   总被引:3,自引:1,他引:2       下载免费PDF全文
李文政  裴盛基   《广西植物》1991,11(4):293-303
云南森林植物(系指木本植物)主要起源于新生代,少数古老种起源于古生代至中生代。云南森林植物区系成分极为丰富而复杂,据研究已知森林植物149科(蕨类植物1科,裸子植物10科,被子植物138科),840属,5271种。本文根据对云南森林植物15个分布区类型统计分析,证明云南森林植物区系明显富于热带性同时兼有丰富的温带成分,热带属占总属数72.12%,温带属占总属数21.87%,中国特有属在云南有46属,占云南总属数5.33%。中国特有属的三个分布中心。有两个分布中心在云南(即新特有属中心和古老特有属中心)。本文还对云南森林植物区系的地理成分起源;云南森林植物区系成分复杂、丰富之成因;云南森林植物开发利用之前景进行了研究和探讨。  相似文献   

6.
陆树刚   《广西植物》1991,11(3):218-226+289
本文记载了云南产鳞毛蕨属植物18种,其中新种3种,云南新分布的种3种。对一些长期混淆不清的种还进行了分类学讨论。  相似文献   

7.
云南东南部赤车属和楼梯草属研究随记   总被引:1,自引:0,他引:1  
王文采 《植物研究》2006,26(1):15-24
描述了云南东南部荨麻科楼梯草属5个新种和3个新变种;报导了赤车属1个种和楼梯草属3个种在云南的新分布。  相似文献   

8.
童绍全 《植物研究》1998,18(2):137-143
据中国植物志(1981),云南有姜科植物71属,78种,9变种。其后多篇文章论及一些种属,标本也有较多的增加。本文根据现有的标本与文献资料对云南姜科植物作增补与修订,并涉及16属15种,包括1个新种,7个修定后的异名。云南共计有姜科植物18属,148种和11变种。  相似文献   

9.
马先蒿属(Pedicularis)是被子植物中最大的属之一,在云南植物区系中占有重要地位.按照钟补求系统,该属植物在云南有151种分属于13个群72个系.马先蒿属在云南的地理分布体现了下列特点:(1)种类十分丰富,占整个属总种数的25%,占中国的42.6%.(2)包括了该属全部花冠类型,即无齿、有齿的原始类型各为24种、短管具喙的中间过渡类型87种,较进化的长管类型16种.(3)马先蒿属植物分布在云南的11个地理分布区域中,但该属植物在康藏高原区最为丰富,有108个种在本区有分布,占云南种数的71.5%;横断山植物区和东喜马拉雅植物区是本属的现代分布中心和多样化中心.(4)特有现象十分明显,其中8个系、52个种为云南特有,横断山和东喜马拉雅的特有种最为丰富,也是本属的特有中心.(5)云南马先蒿植物与邻近的四川(西南部)和西藏(东南部)在区系上联系密切,与缅甸和不丹有一定的联系.  相似文献   

10.
帽果雪胆的齐墩果酸和合欢酸   总被引:1,自引:1,他引:0  
一九七○年我们从云南民间用于治疗菌痢的草药罗锅底(Hemsleya amabilisDiels)中分离鉴定了两个抗菌有效成分。我所多年来对此属植物调查的结果,在云南已发现二十多个新种和新变种植物。昆明植物园进行了引种驯化研究。目前这一属植物化学成分除罗锅底外  相似文献   

11.
The morphology of the fertile pinnules of Fascipteris densata Gu et Zhi have been subjected to a detailed morphological investigation based on recently collected specimens from the Upper Permian of Yunnan Province, south China. These investigations have revealed that this species possesses synangia of the Asterotheca-type, situated in two or three rows either side of the midrib on a Fascipteris-type pinnule. This arrangement of Asterotheca-type synangia is extremely unusual considering that all other reports of this genus are with a single row of synangia located on each side of the midrib of a pecopteroid-type pinnule. As a consequence of this unique morphological arrangement, a new genus, Zhutheca densata Liu, Li et Hilton gen. et comb. nov. has been created to distinguish this material from other specimens of the Asterotheca and Fascipteris types. The structure and arrangement of the fertile pinnule of Zhutheca are compared with other Palaeozoic and Mesozoic marattialean taxa with which it shares certain features of its morphology. In addition, the stratigraphic, evolutionary and phylogenetic significance of Zhutheca are considered in detail.  相似文献   

12.
Leaf anatomy is compared for all species of Raoulia. The species are tabulated according to their lamina structure. Noteworthy anatomical features are lamina type and grade of differentiation, stomatal position, epidermal and cuticle thickness, shape of mesophyll cells, presence or absence of central clear cells, sclerenchyma caps, abaxial collenchyma and protruding midrib. It is shown that leaf anatomy data provide characters which are taxonomically useful in Raoulia. The main subgenera are supported except that the leaf anatomy of R. haastii is anomalous and that of R. youngii is typical of R. subg. Raoulia rather than R. subg. Psychrophyton. The leaf anatomy of R. petriensis is unique in the genus.  相似文献   

13.
报道了采自安徽省金寨县天堂寨镇的中国对囊蕨属一新记录植物——光叶对囊蕨Deparia otomasui(Sa.Kurata)Seriz.。光叶对囊蕨之前仅发现于日本,其根状茎细长横走,叶片一回羽状,羽片羽状分裂,叶为纸质,有光泽,近光滑无毛,是对囊蕨属中形态较为独特的一个物种。该文对光叶对囊蕨的形态特征进行了详细描述,并提供了生态照片和线描图,编制了安徽省对囊蕨属部分物种的检索表,同时对该种的保护等级进行了评估。凭证标本保存于上海辰山植物标本馆(CSH)。  相似文献   

14.
云南蕨类植物小志   总被引:4,自引:1,他引:3  
根据PYU(云南大学蕨类植物标本室)保存的标本,报道云南蕨类植物若干新资料,内容为:3新种,2新变种,中国分布新记录2种,云南分布新记录1属3种,1个种的新组合名称,另1个种的属、科位置的订正及其新组合名称。  相似文献   

15.
Telangium pygmaeum Graham is known from Upper Pennsylvanian coal balls from the Calhoun coal mine (Illinois). The species was described as possessing radial synangia consisting of 3-5 sporangia fused laterally for about f13 their length. Synangia were believed to be sessile and borne terminally or laterally on a branching rachis without lamina. Examination of new coal ball material of the same age indicates that the synangia are borne abaxially on the pinnules of a compound frond with the anatomy of a Psaronius leaf (Marattiales). Synangia are sessile and borne in two rows, one on either side of the pinnule midrib, under the unbranched lateral veins. Synangia are radial, 0.6 mm in diam, and consist of a ring of thin-walled sporangia fused to near their apices prior to dehiscence, but separating on dehiscence to release spores along their inner midline. Spores are spherical, trilete, 30-48 μm in diam, with a granulate ornamentation. The new genus Araiangium is proposed for this material based on the organization of the sessile thin-walled synangia. Araiangium is compared with other marattialean genera with sessile synangia (Acaulangium, Acitheca), and with the pedicellate synangia of various species of Scolecopteris. Criteria used in the delimitation of genera in Paleozoic anatomically preserved marattialean fertile foliage are discussed.  相似文献   

16.
A new species of the cyprinid genus Placocheilus Wu 1977, is described from the Dulong River drainage (in the upper reach of the Irrawaddy River), northwestern Yunnan Province (China). Placocheilus dulongensis sp. nov. can be distinguished from the other three congeners, namely P. caudofasciatus, P. robustus and P. cryptonemus, by the following combination of characters: no semicircular black mark on the middle of each caudal fin lobe; no blackish band across the dorsal fin; one pair of rostral barbels and one pair of maxillary barbels; 39-40 perforated lateral line scales. Osteological characters, such as the shape of the second infraorbital, preoperculum, and the vertical plate of the urohyal were observed in a cleared and stained skeletal specimen. A simplified key to the genus Placocheilus is provided based on the comparisons among the four species.  相似文献   

17.
Numerous anatomically preserved fragments of the Middle Pennsylvanian age filicalean fern, Botryopteris tridentata, occur in coal balls collected at the Pittsburgh and Midway Coal Company mine near Baxter Springs, Kansas. Included are the first fertile specimens of the species, evidence of complete vegetative frond architecture, and fronds that are specialized for vegetative propagation. Rhizomes are erect and unbranched, have helical phyllotaxis and short internodes, and typically display an ectophloic solenostele. Fronds are tripinnately compound with lobed pinnules that have open, dichotomous venation. Fertile pinnae or individual pinnules are interspersed among vegetative frond segments and produce sori of annulate sporangia beneath veins on the abaxial pinnule surface. Fertile pinnule lobes are rolled toward the abaxial surface to enclose the sori. Sporangia have a horizontally elongated biseriate annulus located near the short broad stalk and produce tetrahedral-shaped trilete spores with coarse spines. Epiphyllous branches diverge from the stipe or rachis, and some fronds produce only branches. This fern is reconstructed as having short stems. Helically arranged fronds are either pinnately dissected with lobed vegetative pinnules and abaxially rolled fertile pinnules or are specialized for vegetative propagation. The latter functioned as the foliar equivalent of stolons. While some characters of the B. tridentata plant are similar to those of Botryopteris forensis, generitype of the Botryopteridaceae, others are more comparable to those of Psalixochlaena cylindrica, generitype of Psalixochlaenaceae, suggesting the need for reevaluation of systematic relationships among species of the Botryopteridaceae and Psalixochlaenaceae.  相似文献   

18.
The family Comasteridae is divided into four subfamilies on the basis of syzygy positions in the division series and proximal arm. Use of this character results in major differences in perceived relationships between genera compared with that obtained when traditional subfamilial characters are used. The primary character previously used to determine comasterid subfamilies, cirrus ornamentation, is rejected as unimportant in recognizing taxa any higher than species. Seventeen genera, including a new genus from the tropical western Atlantic, and 99 species are now recognized in the Comasteridae. Four of these genera and five species cannot be placed within the newly diagnosed subfamilies. Characters of generic importance are considered to be pinnule comb form, mouth position and, to a lesser extent, the characters traditionally used to distinguish genera.  相似文献   

19.
报道了在云南西南部发现的凤仙花属一新种——滇红凤仙花(Impatiens quintadecimacopii G.W.Hu&Q.F.Wang)和一新记录种——伸展凤仙花(I.porrecta Wall.ex Hook.f.&Thomson)。这两个种在形态上很相似,但在花色、侧萼片形状、旗瓣形状和蒴果颜色上明显有别。根据形态特征,这两个种应属于凤仙花亚属(I. subg.Impatiens)单花组(I. sect.Uniflora)。结合核糖体DNA内转录间隔区序列(ITS)与叶绿体atpB-rbcL间隔区序列开展系统发育分析,结果进一步确认了这两个种关系紧密,以及它们在单花组内的系统位置。  相似文献   

20.
通过查阅馆藏标本和野外观察,对蹄盖蕨属(Athyrium Roth)的分类性状进行了比较研究,认为根状茎类型、叶上是否具刺、孢子囊群的形状、羽片基部上侧是否具耳状突起和是否具棘头状腺毛等5个形态性状较为稳定,可作为蹄盖蕨属的属下分类性状;叶或羽片的形状及羽片是否具柄等性状可作为分种性状;叶的分裂回数、鳞片和叶柄、羽轴及小羽轴的颜色、被毛多寡及裂片形状等形态性状不适合单独作为蹄盖蕨属属内分种的性状。  相似文献   

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