共查询到19条相似文献，搜索用时 500 毫秒
1.
韦毅刚 《中国科学院研究生院学报》2004,42(6):528-532
报道了在中国广西发现的苦苣苔科一新属即方鼎苣苔属Paralagarosolen Y. G. Wei 和一新种方鼎苣苔P. fangianum Y. G. Wei。方鼎苣苔属与细筒苣苔属Lagarosolen W. T. Wang近缘，它们的共同特征是花筒细筒状，不肿胀，柱头2；不同点是方鼎苣苔属叶基部有时盾状，聚伞花序具1朵花，花冠裂片顶端圆钝，蒴果宽卵状椭圆球形。 相似文献
2.
描述了在广西发现的苦苣苔科一新属和一新种，即文采苣苔属Wentsaiboea D. Fang & D. H. Qin及文采苣苔W. renifolia D. Fang & D. H. Qin, 并提供墨线图。文采苣苔属的柱头外形略似长檐苣苔属Dolicholoma D. Fang & W. T. Wang, 不同在于前者叶肾形，基部心形，具掌状脉，花冠斜钟状，裂片圆形，雄蕊和退化雄蕊着生于冠筒近基部。新属在体态上还接近小花苣苔属Chiritopsis W. T. Wang, 但前者叶具掌状脉，冠筒钟状，远轴侧膨胀，柱头马蹄形；在后者叶具羽状脉，冠筒筒状，不膨胀，柱头下唇倒梯形至线形。 相似文献
3.
报道了在广西发现的苦苣苔科半蒴苣苔属Hemiboea一新种，即红苞半蒴苣苔H. rubribracteata Z. Y. Li & Yan Liu。该新种叶形与贵州半蒴苣苔H. cavaleriei Lévl.相近，不同在于茎较粗且坚硬，总苞红色，萼片较长，花冠外面白色，无毛，下唇3裂至中部。 相似文献
4.
李振宇 《中国科学院研究生院学报》2004,42(3):261-262
记载了广西苦苣苔科一新变种——翅茎半蒴苣苔Hemiboea subcapitata Clarke var. pterocaulis Z. Y. Li。该变种与原变种不同在于茎具翅，花期较早。 相似文献
5.
报道了在广西发现的苦苣苔科异裂苣苔属一新变种，即粉绿异裂苣苔Pseudochirita guangxiensis (S. Z. Huang) W. T. Wang var. glauca Y. G. Wei & Yan Liu。它与原变种的区别在于叶近全缘或有不明显的钝锯齿，茎和叶背、叶面密被近贴伏的绒毛，花冠外疏被腺毛。 相似文献
6.
潘开玉 《中国科学院研究生院学报》1987,25(4):264-293
按本文处理，马铃苣苔属Oreocharis包括27种、5变种，其中有5个新种、4个新变
种。文中分析研究了该属的外部形态和地理分布; 在扫描电镜(SEM)下，对22个种的花粉
外壁和16个种的种皮进行了观察。结果认为花冠有三个类型，花药有两个类型，花粉和种皮
的外壁纹饰也可各分为三个类型。花冠的各种类型是稳定的，它们与花粉粒和种皮的特征明
显相关。其相关性是该属次级划分的主要依据。该属分为四个组。以O．bodinieri建立的
属，Dasydesmus Craib被并入Oreocharis。 相似文献
7.
本文首次报道了中国特有异叶苣苔属的染色体数目及核型。该属所研究种类的染色体数目均为
2n＝18,染色体长度在2.0µm以上,在尖舌苣苔族所报道的染色体中显示出较原始的性状。尖舌苣苔
族的染色体基数可能是x=9。异叶苣苔属的间期核均为复杂型;前期染色体呈渐变型。核型从对称型
向不对称型的演化主要表现在近中部着丝粒,尤其是近端部着丝粒染色体比例的增大。毕节异叶苣苔
W．bljieensis和峨眉异叶苣苔W．tsiangiana var．wilsonii的核型分别为2n=2m＋8m＋8sm(1sat)和
2n=2m＋8m(1sat)＋8sm(2sat),较为对称。紫红异叶苣苔W．purpurascens和白花异叶苣苔W.
tsiangiana var. tsiangiana的核型分别为2n=4m＋6sm＋8st(1sat)和2n=4m＋8sm(2sat)＋6st,比较
特化。河口异叶苣苔W．hekouensis的核型是2n=4m+10sm(1sat)+4st,处于二者之间。峨眉异叶苣
苔和原变种白花异叶苣苔的核型差异较大,在外部形态方面二者之间的性状变异也间断较大。本文建 议将该变种从白花异叶苣苔W．tsiangiana中移出自成一种,并和毕节异叶苣苔近缘。 相似文献
8.
王印政 《中国科学院研究生院学报》2000,38(3):231-235
对异叶苣苔属植物地上茎形态发生过程的观察旨在揭示该属地上茎的生长式样。该研究发现异
叶苣苔属植物地上茎的生长式样并不是以往所认为的简单顶端生长。该属植物的顶芽已完全受到抑制。其地上茎实际上是萌发于小型叶叶腋的侧芽替代顶芽生长所形成的各级侧枝系统,即合轴分枝系统。异叶苣苔属植物地上茎的不分枝情况是位于大型叶叶腋的腋芽受到抑制所致,纯粹是一种次生现象,并不是尖舌苣苔族植物原始祖先的孑遗性状。尖舌苣苔族其他属植物地上茎的生长式样并不均是从异叶苣苔属植物的生长式样演化而来。出蕊苣苔属和异叶苣苔属植物地上茎的生长式样可能来自同一个不太远的祖先,但已经向着不同的方向演化。独叶苣苔属植物复杂的圆锥状对花聚伞花序并非从异叶苣苔属地上茎上部,即生殖生长部分退化而来,乃幼态成熟的复化过程所致。尖舌苣苔属的总状花序可能更接近尖舌苣苔族的原始祖先类型。 相似文献
9.
目的:综述唇柱苣苔属植物化学成分及药理作用的研究进展。方法:以"唇柱苣苔属"、"化学成分"、"研究进展"、等为关键词,查询国内外数据库中的相关文献,国内外唇柱苣苔属植物研究不多,归纳整理后主要对唇柱苣苔属植物蚂蝗七、牛耳朵、唇柱苣苔、红药等的化学成分及药理研究进展进行综述。结果与结论:查询有效文献多条。唇柱苣苔属植物共含多种化学成分,其中以黄酮类、苯乙醇苷类、醌类为主,还有萜类和甾体类等成分。在全球唇柱苣苔属植物中,目前仅少数几个种有较为系统的研究,化学成分的研究主要集中在黄酮类、苯乙醇苷类成分及醌类,总体研究较少。药理研究主要集中在抗肝毒、抗炎、抗病毒、抗氧化、抗肿瘤、提高免疫、镇痛作用。 相似文献
10.
本文测定了苦苣苔亚科4族、5属、5种植物的核糖体DNA中的内转录间隔区(ITS)序列及5．8s
rRNA基因的3′端序列。这几种苦苣苔亚科植物的ITS-1的长度范围为234～258 bp,ITS-2的长度范
围为218～246bp。Whytockia bijieensis的ITS-1(258bP)和ITS-2(218 bp)在长度、序列及GC含量上
均与其它几个种有较大差异,其代表的尖舌苣苔族可能很早就自苦苣苔亚科的祖先沿单独的一个分支
演化。以w．bijieensis作为功能性外类群,运用PAUP软件分析仅得到一个最简约树。在简约树上,
Cyrtandra umbelliferm、Briggsia longipes和Anna mollifolia形成一个单系群,bootstrap分析对该分支的
支持强度达97％,Chirita crasslfolia位于该分支的基部。由于系统树上Cyrtandra umbellifera代表的
浆果苣苔族和Anna mollifolid代表的芒毛苣苔族均起源于长蒴苣苔族,结合这3个族在形态上存在过渡系列,建议将浆果苣苔族和芒毛苣苔族均并入长蒴苣苔族。 相似文献
11.
黄淑美 《中国科学院研究生院学报》1987,25(5):384-389
Dichroa Lour., a small genus of Saxifragaceae, contains about 12 species,
ranging from the mainland of S. E. Asia southward to Pacific islands. But most of
the species are more restricted in distribution. Of the 12 recognized species, six are
known from South China and Indochina; three are confined to west and northwest
New Guinea; two are endemic to the Phillipines. Only one species is widely distributed
in S. E. Asia. In the present paper, the genus is divided into two sections and two
series based on the number of stamens and the characteristics of the ovary. One spe-
cies is described as new. 相似文献
12.
Cyclorhiza, a new genus based upon Ligusticum waltonii Wolff, is here proposed. From
the ample materials now in our herbarium, we found that the genus differs from the species
of Ligusticum. As the result of our study, the systematic position of this new genus should
be considered as a member of the tribe Smyrnieae Koch.
Chuanminshen, another new monotypic genus, is here also proposed. It was often considered
as not different from Changium Wolff, but it is a cleary deliminated natural genus being quite
remote from Changium Wolff. This new genus is quite reasonably to be placed in the tribePeucedaneae. 相似文献
13.
郎楷永 《中国科学院研究生院学报》1987,25(6):442-459
Peristylus is a genus of over 60 species, mainly distributed in the Old World
tropics, with many species extending northwards to central China. In the present paper, the
taxa of the genus hitherto recorded in China are taxonomically and phytogeographically dis-
cussed and revised, and, as a result, 20 species are recognized, including one new species, P.
jinchuanicus K. Y. Lang, and four new combinations, P. bulleyi (Rolfe) K. Y. Lang, P. for-
restii (Schltr.) K. Y. Lang, P. longiracemus (Fukuyama) K. Y. Lang and P. neotineoides
(Ames et Schltr.) K. Y. Lang. A full list of synonyms is given, a key to the species is pro-
vided and the distribution areas in China of all the taxa are mapped. 相似文献
14.
林尤兴 《中国科学院研究生院学报》1993,31(5):475-476
One new species of the genus Lepisorus (L. petiolatus Ching et Y. X.
Lin) and one new record of the genus Colysis (C. membranacea (Bl.) Presl) arereported from Guangxi, China. 相似文献
15.
潘锦堂 《中国科学院研究生院学报》1985,23(6):432-443
The Astilbe Buch.-Ham. ex D. Don was founded in 1912. There are
now 18 species throughout the world. USSR, Thailand, Indonesia, Bhutan, Nepal d Kashan-
mir each has only 1 species; Korea, Philippines and USA each has 2; India 3; Japan 6; and
China 7 (including 3 endemics and 1 new variety). And northeast China, north China and
northwest China each has 2; central China and southwest China each 4; eastern China 5.
Thus the distribution centre of this genus seems to be in the region covering Japan and
eastern, central, and southwest China.
This genus is divided into two sections: Sect. Simplicifoliae Engl. and Sect. Astilbe.
Sect. Simplicifoliae may be considered as the primitive one because it has 5 ordinary petals.
This section consists of about 10 species: 5 in China (east China 4; southwest China 3; ce-
ntral China, north China and northeast China each 2; Northwest China 1), 5 in Japan, 2
in Korea, 1 in Philippines and India each. According to the distribution of this section, the
author suggests that the centre of origin of this genus be in the forested parts from Japonthrough east China to southwest China. 相似文献
16.
杨喜林 《中国科学院研究生院学报》1981,19(2):238-244
The present paper deals with 3 genera,Pugionium Gaertn., Lepidium L. and Torula-
ria O. E. Schulz of the family Cruciferae found in the desert regions of China.
Of the genus Pugionium 4 species and 1 new variety and their geographical distribu-
tion are recognized.
Two closely related species of Lepidium, L. apetalum Willd. and L. ruderale L. and
one additional new species are described and their distribution patterns are discussed.
Two species of the genus Torularia previously described by V. Botschantzev (1959)are here redused to varietal ranks, and one additional new species is described. 相似文献
17.
中国山矾科的初步研究(续) 总被引：1，自引：0，他引：1
吴容芬 《中国科学院研究生院学报》1986,24(4):275-291
This paper is a preliminary study on the morphology, taxonomy and geog-
raphy of Symplocaceae, following the system of H. P. Nooteboom and H. Handel-Maz-
zetti et E. Peter-Stibal, who divided the genus into two subgenera according to the floral
characteristics. But I disagree with Nooteboom's unduly broad specific concept, and
adopt Handel-Mazzetti et Peter-Stibal's concept, which usually treated the species of
this family according to their habitats in regions in a relatively narrow sense. The ge-
nus is divided in the present paper into two subgenera, six sections, among which two
are new. Nine new species and three new varieties are described in this paper. Discus-
sions on some taxa are also presented.
The family Symplocaceae consists of 300 species in the whole world. They are dis-
tributed mainly in tropical and subtropical Asia, Oceania and America. In China there
are about 77 species widely distributed in the south-western and south-eastern parts,
with only one species, namely Symplocos paniculata (Thunb.) Miq. extending northward
to north-eastern part. 相似文献
18.
半蒴苣苔属的研究(续) 总被引：1，自引：0，他引：1
李振宇 《中国科学院研究生院学报》1987,25(3):220-230
The genus Hemiboea is a curious genus of the tribe Didymocarpeae (Cyrtandroi-
deae), characterized by its peculiar pistil with one fertile carpel and its follicle-like capsule. This genus has not yet been thoroughly studied since its establishment by C. B. Clarke in 1888. In
the present paper, the taxonomic history is briefly reviewed; the external morphology, leaf his-
tology, pollen morphology and geographical distribution are discussed; a key to the 21 species
recognized by the author is provided; and the economic uses reported in various publications
are summarized.
I. Morphology
(1) Sclereids The foliar sclereids, occurring in this genus and defined by their forms,
fall into two types.
(A) Vermiform selereids This type of sclereids is noted in 15 species and may be clas-
sified into two groups according to their positions in leaf tissues. Those of the first group
are interspersed in the ground tissue around the vascular bundles of leaves and noted in 12
species, i.e.H. longisepala, H. cavaleriei, H. bicornuta, H. fangii, H. omeiensis, H. gracilis,
H. glandulosa, H. mollifolia, H. pingbianensis, H. parviflora, H. strigosa and H. gamosepala,
and those of the second group are dispersed in the mesophyll, occurring in H. subcapitata, H.
henryi and H. latisepala.
(B) Astrosclereids The sclereids of this type are discovered for the first time in Hemiboea,
dispersed in the mesophyll of a single species, i.e.H. lungzhouensis.
No foliar sclereids are found in the remaining 5 species, i.e.H. integra, H. flaccida, H.
longgangensis, H. subacaulis and H. follicularis.
The differences in forms and positions of the foliar sclereids and their absence or pre-
sence are of great help in understanding the relationship between the infrageneric taxa.
(2) Pollen grains The pollen grains of 19 species were examined with LM and SEM.
They are 3-colporate, subglobose or prolate, 20-38.8×22-28μm. The exine is 1.3-2μm
thick and the sculpture is foveolate (e.g.H. cavaleriei) to reticulate (e.g.H. omeiensis). In
Sect. Subcapitatae the pollen grains are subglobose or prolate, while those of Sect. Hemiboea are
prolate.
No pollen grains are observed in anthers of 13 speciemens of H. subacaulis var. subacaulis
and var. jiangxiensis.
(3) Seed-coat Under SEM the seed-coat exhibits considerable diversity in the genus, fur-
nishing useful characters for explaining the relationship between the two sections.
2. Geographical distribution The genus Hemiboea ranges from the eastern border of the
Xizang Plateau and Yunnan Plateau eastwards to Ryu Kyu Islands, and from the southern
slope of the Qinling Range southwards to northern Vietnam. The karst region of S. E. Yun-
nan and W. Guangxi is the centre of maximum variation of the genus and is probably its origin
centre, where the most primitive taxon exists, and where more species (13 species, i.e. 61.9 per
cent of the sum total) and more endemic species (8 species) are found than elsewhere.
3. Classification The genus consists of 21 species and 6 varieties which are classified into
2 sections. The Clarke's classification is accepted, but emended here as follows:
Sect. 1. Subcapitatae Clarke Sepals free or posterior ones connate. Muri of the seed-coat
laevigate or rugose; bottom of meshes flat, smooth or with few verrucae. Pollen grains subglo-
bose or prolate.
Sect. 2. Hemiboea Sepals connate. Muri of the seed-coat tuberculate or aliform-tuberculate;
bottom of meshes flat or concave, with dense verrucae. Pollen grains prolate.
Based on the analysis of external and internal morphological characters, the main evolu-
tionary trends in the genus are discussed and enumerated, and a hypothesis indicating the re-
lationships between the two sections is given. 相似文献
19.
石铸 《中国科学院研究生院学报》1993,31(5):432-450
The Present paper is a preliminary result of study on three genera,
Dubyaea, Syncalathium and Soroseris of the tribe Lactuceae (Compositae) in China.
The genus Dubyaea in China so far known consists of 14 species, of which
six are described here as new: D. pteroponda Shih, D. lanceolate Shih, D.
muliensis Shih, D. panduriformis Shih, D. cymiformis Shih and D. jinyangensis
Shih. In addition, one new combination, i.e.D. bhotanica (Hutch.) Shih, is
made.
There are six species in the genus Syncalathium in Chinese flora, of which one
species is described here as new. This is S. orbiculariforme Shih. A new combina-
tion, S. pilosum (Hand.-Mazz.) Shih, is made in the paper.
The genus Soroseris comprises nine species, of which three are described here
as new, S. teres Shih, S. chrysocephala Shih and S. qinghaiensis Shih. Three new
combinations, i.e.S. trichocarpa (Franch.) Shih, S. hirsuta (Anth.) Shih, and S.erysimoides (Hand.-Mazz.) Shih are made in the present paper. 相似文献