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1.
吴国芳 《中国科学院研究生院学报》1994,32(5):433-466
本文通过对国产灯心草属植物的研究，提出了一个中国灯心草属分类系统排列，首次确认我国产6亚属，14组(包括10个新组)，4个系(包括3个新系)，77种(包括14个新种)，l亚种(新亚种)和10变种(包括4个新变种)，对其中一些种类作了归并及处理。 相似文献
2.
中国虎耳草属的研究 总被引：1，自引：0，他引：1
潘锦堂 《中国科学院研究生院学报》1991,29(1):1-24
本文提出了一个中国虎耳草属系统，确认我国有2亚属，8组，7亚组(包括1新亚组)，31系(包括23新系)，4亚系(新亚系)和203种(包括2新种和4新变种)。 相似文献
3.
本文采用薄层层析和提取、分离、光谱分析等方法分析研究了三尖杉属植物叶的双黄酮类化合物，根据获得的化学分析结果，我们同意：(1)将三尖杉属分为二个组：篦子三尖杉组Sect．1 Pectinaea，只包括蓖子三尖杉一种；三尖杉组Sect．2 Cephalotaxus，包括本属所有其它种。(2)支持三尖杉科只包括三尖杉属1属，不支持将红豆杉科中的穗花杉属(Amentotaxus)归入三尖杉科的主张。(3) 认为三尖杉科与南洋杉科、松科、杉科和柏科的亲缘关系较远，而与红豆杉科及罗汉松科的亲缘关系密切。 相似文献
4.
蔡联炳 《中国科学院研究生院学报》1997,35(2):148-177
本文对中国鹅观草属Roegneria进行了分类修订，提出了一个新的分类系统。新系统包括19个新组合或新等级，并按照颖分组、芒分系的原则确认了中国该属植物4组、18系、79种、22变种，其中包括7新系、5新种和1新变种。此外，一些类群的省级分布新记录也在本文作了报道。 相似文献
5.
中国羽藓科植物自19世纪起即有报道,但迄今才进行首次全面校订,现知中国有17属和71种
(包括1亚种)。本文主要就其中7个属：薄羽藓属、牛舌藓属、小羽藓属、麻羽藓属、毛羽藓属、沼羽藓属及锦丝藓属中的一些种属名称作修订和新增补。文内涉及1新种、3新异名(含1属的新异名和2个种的新异名)和1新中文名。 相似文献
6.
黑龙江晚白垩世植物区系及东亚、北美区系的关系 总被引：5，自引：0，他引：5
本文记载了黑龙江嘉荫县乌云组所产植物化石，计有53种，隶属39属、28科。其中蕨
类植物7种，裸子植物8种，被子植物38种(包括单子叶植物1种)，10个种为新种。
乌云组植物化石的区系及植被的分析结果表明，在植物区系成分中，大多是亚热带至暖温
带分子，具少数温带成分，由此组成的群落有暖性针叶林，落叶阔叶林和常绿阔叶林等，共同组
成暖性针阔叶混交林，指示当时气候温暖潮湿，大约是暖温带向亚热带过渡的气候特点。再从
植物化石叶子外貌特征来分析，其中全缘叶占40％; 叶的体积以中型的占大多数，大型和小型
的均少数; 脉序以具掌状脉的占多数。这些特征说明，沉积时期亦为温暖潮湿的气候。
晚白垩世在东亚出观的35属化石中，其中27属和北美共有，约占总属数的77％，这种区
系组成的相似程度，表明其区系具有密切的亲缘关系。这种亲缘随着时间的推移，在进入第三
纪或向更晚发展的进程中而逐渐减弱。主要由于大陆漂移和板块运动，使欧亚、北美在第三纪
初完全分离，此后这两块大陆隔离发展，植物区系的相同分子逐渐减少，以至现在生存植物中
的相同属仅占总数的4．1％，其中草本植物还占有相当大的比例。
根据我国东北地区晚白垩纪所产植物化石及同时代南方所产化石，大致可把晚白垩世的
植物区(带)划分为三个：(1)暖温带至亚热带植物区，主要代表植物是Metasequoia，Trochoden-
droides，Platanus，Ampelopsis，Protophyllum，Pterospermites，Menispermites; (2)亚热带至热
带植物区，植物有Brachyphyllum，Cinnamomum，Nectandra和棕榈科植物; (3)亚热带或干
旱植物区，兼有南北过渡的植物或呈干旱性的植物。
乌云组植物大化石共有33属，和东亚，北美同时代植物群对比，出现不少相同属种，其中
15个属种出现在苏联晚白垩世的察加扬组及东锡霍特阿林，11个属种出现在日本晚白垩世
的Kuji地区，若与加拿大晚白垩世植物群比较,有11个相同属种; 与阿拉斯加晚白垩世植物
对比，则有12个相同属种; 若与乌云组同属一区的太平林场组比较，相同属种更多。再从孢粉
组合成分看，和本区松辽盆地明水组相同的属有15个，并具有少数晚白垩世代表性的花粉如
鹰粉、沃氏粉和山龙眼粉，表明乌云组的时代和明水组接近。同时在乌云组大化石中绝灭类型约占70％，证实该植物群的古老性。其时代属于马斯特里赫特期至达宁期而不是古新世。 相似文献
7.
稻属分类的现状及存在问题 总被引：1，自引：0，他引：1
稻属(Oryza L．是禾本科中重要的植物类群，该属含20余种，广泛分布于全球热带和亚热带地区。未来水稻育种的重大突破还将有赖于对稻属基因库中丰富种质资源，特别是野生稻资源的利用和开发。由于稻属植物在农业生产中的重要作用，引起了众多的植物分类学家、遗传学家、育种学家和分子生物学家的广泛研究。稻属自Linnaeus于1753年建立以来的200多年中，无论在物种的数量和分类系统上都产生了很大的变化。多位学者对稻属的属以下等级和种间的分类都做了详细的工作，对稻属现代分类系统的建立起到了重要的作用。Roschevicz(1931)对稻属全面深入的研究为后来的稻属系统分类奠定了基础。Sharma &; Shastry (1965) 建立的稻属分类系统在很大程度上受了 Roschevicz(1931)工作的影响，对属以下种以上的分类等级也处理得较合理，但是他们对稻属的分类定义较为广泛，包括了好几个如今已不放在稻属的物种。Vaughan(1989)对全球的稻属标本进行了较为全面的查证和研究，他建立的稻属系统不仅在属的界定上更为合理，而且对稻属中各物种的形态变异、地理分布和种间的关系，都有更清楚的描述。遗憾的是，Vaughan (1989)采用的属下等级——“复合体”(complex)，不符合国际植物命名法规(ICBN)的规定。Lu(1999)在对前人大量工作的基础上，结合现代对稻属的研究成果并包括了近年来发表的一些新种，建立了稻属3组7系24种的分类系统。本文结合最新的研究成果对稻属作了进一步的修订，列出了以形态特征为基础的分种检索表，并对稻属分类中仍存在的一些问题进行了讨论。 相似文献
8.
用AP-PCR技术测定了中国慈姑属植物基因组DNA的多态性,以其为分子性状用UPGMA方
法聚类,结果表明:中国慈姑属植物可分为3大类,包括7种3变种或变型(未包括浮叶慈姑)。本文的结果与基于形态和核型分析的结果一致。 相似文献
9.
10.
中国菊科菜蓟族植物研究(Ⅱ) 总被引：1，自引：0，他引：1
石铸 《中国科学院研究生院学报》1984,22(5):386-396
本文是对国产菜蓟族两个属研究的一个小结。一个是蓟属(Cirsium Mill. Ecmend．Scop.)，将全部国产蓟属49种植物分隶排列在8个组中，其中3个组为新成立的组，1个组为新的组合。记载了9个新种，1个新组合种，4个种为中国分布新记录。将过去学者们发表的组、种 及变种等各级上的65个名称处理为新异名，检查出错误鉴定8处，对变异较大的种给予了说明和讨论。另一个是刺膜菊属(Alfredia Cass.)，记载了一个新种。 相似文献
11.
李承森 《中国科学院研究生院学报》1982,20(3):331-342
A new psilophytic plant, Hsüa robusta, is found in the Xujiachong Formation
(Emsian) of the Lower Devonian from the Qüjing (= Kütsing) district of Yunnan,
China. This plant is tentatively referred to the Cooksoniaceae of Rhyniales.
Hsüa gen. nov.
Type species: Hsüa robusta (Li et Cai) C. S. Li.
Diagnosis: Plants erect and then creeping. Main axes dividing pseudomonopodial-
ly and bearing dichotomous lateral branches which somewhat differentiate into vegeta,
tire and fertile ones, with dichotomous root-like and rhizophore-like appendages. Spo-
rangia terminal, round to reniform or wide reniform, dehiscing along distal margin into
two equal halves. Spores homosporous, trilete. Stomata anomocytic. Protostele cen-
trarch.
Hsüia robusta (Li et Cai) C. S. Li, comb. nov.
Cooksonia zhanyiensis Li et Cai, Acta Geologica Sinica, 52 (1) 1978, p. 10, pl. II,
fig. 6.——Taeniocrada robusta Li et Cai,ib. p. 10, pl. II, fig. 7—14.
Diagnosis: Characters same as in generic diagnosis. Main axes 6—10 mm wide and
at least 24 cm long, with vascular strands 1.2—2.4 mm acr oss. Fertile branches 3—4
times equally or unequally dichotomous, 10—1.5 mm in width and up to 11 cm in length,
possessing a vascular bundle of 0.5 mm in its greatest diameter. Branches circinately
coiled in apical regions. Axial tubercles, root-like and rhizophore— like appendages aris-
ing from the main axes usually anterior to the lateral branches. Axial tubercle round
with a diameter of 2.2—2.4 mm, having a vascular bundle about l mm across. Root-
like branches 3 times bifurcate, 1—0.3 mm wide and up to 1.5 cm long, with a vascular
bundle about 0.1 mm across. Rhizophore-like appendages forked, 3—1.7 mm in width,
possessing a vascular bundle of 0.7 mm in its greatest diameter. Root-like protuberances
sometimes arising from rhilzophore-like branches. Epidermal cells of axes generally
elongate, measuring 60—290μby 25—60 μ. Stomata mainly fusiform, 90—110 μ long
and 50—60μ wide, consisting of a pair of guard cells enclosing a pore 6—15μ in length
and 1—3μ in width. Cuticle of guard cells quite thick. Stomatal density about 5 per
mm2. Sporangia 0.8—4.2 mm high, 1.0—8.2 mm across, usually having a dehiscent distal
border which measures 50—100μ broad. Demarcation between sporangium and its stalk
quite clear. Epidermal cells of basal part of sporangial walls elongate, about 100 μ long
and 30μ wide, but those of distal part isodiametrally polygonal, about 50μ in diame-
ter. Stomata, radially arranged scattering over sporangial walls, generally round about
50μ in diameter and 50 per sporangium. Spores round, 18—36μ (average 27μ) indiameter, and smooth. Tracheids of protoxylem about 10μ across; those of metaxylem
about 30μ across, with scalariform thickening.
This plant is similar to Renalia hueberi Gensel in general morphology, but differs
from the latter in possessing root-like and rhizophore-like branches.
The generic name is derived from Prof. Hsü Jen. This paper is a thesis for M. Sc. 相似文献
12.
洪德元 《中国科学院研究生院学报》1984,22(3):181-184
Echicocodon Hong (Wahlenbergieae); Gen. nov.
Calyx 2-5-saepe 4-fidus; lobis utrinque 2-4-lobulis spiniformibus praeditis. Corolla tu-
bulosa; ad medium parterm (3-) 4 (-5)-lobata. Stamina (3-) 4 (-5); libera; sed inter
se eonniventia; filamentis basi parum expansis. Ovarium fere inferum; 3-5-1oculare; stig-
mata 3-5; demum recurva; linearia; ovula ∞. Capsula globosa; 3-5-locularis; spice locu-
licide dehiscens; valvis calycis lobis alternantibus. Semina ∞ ; minima; ellipsoidea; obtuse tri-
quetra.——Herbae perennes; lactesentes; radicibus palaribus crassiusculis. Folia alterna; pin-
natipartita. Flores solitarii terminalesque vel 2-3 in cymam conferti.
Genus monotypicum; in provincia Hubei Sinae cresens.
Typus generis: Echinocodon lobophyllus Hong.
Echinocodon lobophyllus Hong; sp. nov. plate 1
Herbae diffusae; omnino glabrae; radicibus palaribus ad 5 mm crassis. Caulis ad 40 cm
longus; ramosissimus. Folia alterna; petiolis 5-10 mm longis; laminis ellipticis; 5-20 mm
longis; 3-15 mm latis; basi anguste cuneatis; apice obtusis; pinnatisectis vel ad medium
pinnatipartitis.
Flores solitarii terminales vel 2-3 in cymam conferti; pedicellis 1-5 cm longis. Caly-
cis lobi ovato-lanceolati; 2-6 mm longi; lobulis spiniformibus exclusis 1-3 mm lati. Corol-
la purpureo-caerulea; tubulosa; 3-4.5 mm longa; ad medium (3-)4(-5)-lobata; lobis la-
te ovato-diltoideis; ad 3 mm latis. Stamina inter se conniventia; filamentis liberis; 1.5 mm
longis; basi expansis; ciliatis; antheris oblongis; 1 mm longis. Stylus 1 mm longus; stigmata
linearia; demum recurva. Capsula globosa; 3-5 mm diam.; sed parte supera conica et 2 mm
longa. Semina minima; luteo-fusca; ellipsoidea; obtuse triquetra; 0.3 mm longa.
China: Hubei Province; Yunxi County; near the town; 300 m alt.; 1 Jul. 1983. Ma Yu-
an-jun and Hong De-yuan PB83006 (holotype; PE); the same locality; 11 Jul. 1978; Ma
Yuan-jun 3921.
The new genus; Echinocodon Hong; shows its systematic position in the tribe Wahlen-
bergieae by the inferior ovary and capsule which loculicidally dehisces above the calyx and
is closely related to the genera Codonopsis; Platycodon and Wahlenbergia; from all of which
it differs in having the calyx lobes with spinelike lobules and the pinnatisect or pinnatipar-
tite leaves. From Codonopsis it differs also in having the linear stigma lobes; from Platyco-
don also in the capsule valves alternate with the calyx lobes and from Wahlenhergia also in
having the 4(5)-colpate pollen grains.
Meiosis in pollen mother cells was examined and; 8 bivalents in MI and 8 chromoso-
mes in MII were always observed (Plate 2: 1-2). The chromosomt number is thus de-
termined to be n=8.
The pollen grains taken from the flowers which were fixed in the fields with Carnoy
II fixative (6:3:1 absolute alcohol/chloroform/glacial acetic acid) were examined without
further treatment under SEM; and under LM after acetolysis. The result shows that they
are oblate; 4(5)-colpate (Plate 2: 3-4); with colpi 10.5μm long and 2.5μm wide and
with a smooth colpus membrane (Plate 2: 5). The exine is 2-layered; with a distinct bacu-
late layer (Plate 2:7-8). The sexine surface is covered with spinules almost regularly spa-
ced; 0.6μm high and basally divided. The sexine between spinules consists of short ridges
(Plate 2: 6).
The new genus is closely related to the genera Codonopsis; Wahlenbergia and Platyco-
don from gross morphological point of view; but its pollen grains differ markedly from
all of them. The pollen grains in Codonopsis are longly 5-colpate; and with the sexine consis-
ting of a low relief reticulum; those in Platycodon longly 5-colporate and those in Wahlen-
bergia 3-porate. The pollen type of the new genus Echinocodon with short colpi is therefore
probably derived from the longly colpate type of pollen like that of Codonopsis or directly
from longly colporate type like that of Platycodon; and is likely more primitive than thatin Wahlenbergia. 相似文献
13.
The fossils here described were collected from the Lai Yuan, Hebei Province in
north China. Well-preserved plant parts are cones of Pinus, identified as Pinus pro-
totabulaeformis sp. nov. The species is different from other taxa of Pinus by larger
cones and scales. The size of the cone is a reliable diagnostic character in the group:
The large cone and scale indicate rather an arid climate in Summer in the region
where the fossils are discovered.
The age of bearing-beds is considered Upper Eocene-Lower Oligocene.
Diagnosis: Cones ovate in general outline, 8.5 cm long, 4.5 cm in diameter. Seed
scales oblong, 2—2.5 cm long, 0.8—1.1 cm wide. Apophysis obviously fattened andthickned, convex, compressed rhomboid, rostrate at the apical part of seed-bract. 相似文献
14.
中国绞股蓝属(葫芦科)的研究 总被引：2，自引：0，他引：2
The genus Gynostemma B1. consists of 13 species and 2 varieties in the whole world,
among which 11 species and 2 varieties occur in China. They are distributed in S. Shaanxi
and the southern part of the Yangtze River (including Taiwan province) in China and also
in Korea, Japan, Sri Lanka, India and Malesia. Based on the characters and dehiscence of fruit, the genus Gynostemma B1. may be divided into two subgenera, i.e. Subgen. I. Gynostemma and Subgen. II. Trirostllum (Z. P. Wang et Q. Z. Xie) C. Y. Wu ct S. K. Chen,
comb. nov.
1. Subgenus Gynostemma. The fruits are baccate, globose, 3-umbonate and incorni
culate on the apical side, indehiscent when mature. The style apex in female flower is bifid.
Type of subgenus: Gynostemma pentaphyllum (Thunb.) Mak.
This subgenus contains 8 species and 2 varieties in the world, among which 6 speci-
es and 2 varieties occur in China, i.e.1.G. simplicifolium B1. (Yunnan, Hainan of Guang-
dong); 2. G. laxum (Wall.) Cogn. (S. Yunnan, Hainan of Guangdong and Guangxi); 3.
G. burmanicum King ex Chakr. (Yunnan), 3a. G. burmanicum var. molle C. Y. Wu (Yun-
nan); 4. G. pentaphyllum (Thunb.) Mak. (S. Shaanxi and the soutern area of the Yangtze
River of China), 4a. G. pentaphyllum (Thunb.) Mak. var. dasycarpum C. V. Wu (Yun-
nan); 5. G. pubescens (Gagnep.) C. Y. Wu, st. nov. (Yunnan); 6. G. longipes C. Y. Wu,
sp. nov. (endemic to China: Yunnan, Sichuan, Guizhou, Shaanxi and Guangxi).
2. Subgenus Trirostellum (Z. P. Wang et Q. Z. Xie) C. Y. Wu et S. K. Chen, comb.
nov.——Trirostellum Z. P. Wang et Q. Z. Xie in Acta Phytotaxonomia Sinica 19 (4):
483. 1981, syn. nov. The fruit are capsules, subcampanulate, 3-corniculate on the apical side, dehiscent when mature. The style apex in female flower is luniform and irregularly denticulate at margin, rarely bifid.
Type of subgenus: Gynostemma cardiospermum Cogn. ex Oliv. This subgenus comprises 5 species, which are all endemic to China. 1. G. yixingense (Z. P. Wang et Q. Z. Xie) C. Y. Wu et S. K. Chen (Jiangsu and Zhejiang); 2. G. cardio spermum Cogn. ex Oliv. (Hubei, Shaanxi and Sichuan); 3. G. microspermum C. Y. Wu et S. K. Chen (S. Yunnan); 4. G. aggregatum C. Y. Wu et S. K. Chen (NW. Yunnan); 5. G.laxiflorum C. Y. Wu et S. K. Chen (Anhui). 相似文献
15.
In the work mitotic chromosomes in root-tips of 7 species native to Sichuan Pro-
vince were examined and their karyotypes were analysed based on 7-8 cells at mitotic meta-
phase, using Levan et al.'s (1964) nomenclature. The list of species and origin of the materials
used in this work are provided in the appendix. The micrographs of mitotic metaphase of all
the materials are shown in Plates 1 and 2; the idiograms in Fig. 1, 1-9, and the parameters
of chromosomes are provided in Tables 1-9. All the chromosome countings and karyotypes in
this paper are reported for the first time.
Characteristics of the karyotypes may be summarized as follows:
1. 2n=38 are found in all the materials except A. sichuanensis, which has 3 cytotypes, i.e,
2n=38+5B, 2n=38+lB and 2n=38+OB (Plate 2, 1-2, Fig. 1, 5-6).
2. The karyotypes are of two major types: the karyotype of A. flaviflora falls into 3C in
Stebbins's (1958, 197l) classification of karyotypes and those of all the other species into 2C.
The two types are also different from each other in the number of large and medium-sized
chromosomes pairs and morphology of the first pair of chromosomes (compare Plate 2, 5, Fig.
1, 9 with the other micrographs and idiograms).A. flaviflora with the karyotype 3C also differs
from the other species in a series of gross morphological characters: the species is of a yellow and
campanulate corolla.
3. The species with caespitose leaves (A. caespitosa and A. omeiensis) have essentially the
same karyotype, which is rather different from those of the species with scattered leaves. There
are two pairs of small sm chromosomes (arm ratio ≥1.90) in the former karyotype (Tables 1
and 3), but all the small chromosomes are m or sm with arm ratio <1.80 in the latter karyotypes. 相似文献
16.
王镜泉 《中国科学院研究生院学报》1990,28(5):372-378
利用光学显微镜和扫描电子显微镜，对我国眼子菜属、角果藻属和水麦冬属1 9种植物的花粉形
态进行了研究。在对比观察的基础上，总结了各属的特征，归纳了眼子菜属的花粉类型，并讨论了一些有关分类的问题。 相似文献
17.
本文对国产葱属根茎组的8种植物进行了染色体研究，发现染色体数目2n＝16或32，核型属2A
或2B型，对称性较高。其染色体数目和核型分别为：Allium leucocephalum 2n(2x)＝16＝12m+2sm
+2st(2SAT); A，strictum 2n(4x)＝32＝16m+4sm+12st；A.ramosum 2n(2x)＝16=14m+2st
(2SAT); A．bidentatum 2n(4x)=32＝24m+4sm+4T;A．tenuissimum 2n(2x)=16=10m+4sm+
2st(2SAT)，A．anisopodium 2n(2x)＝16＝12m+2sm+2st(2SAT)；A．anisopodium var．zimmermanni
anum 2n(4x)＝32＝24m+4sm+4st(4SAT); A．condensatum 2n(2x)＝16＝14m+2st(2SAT)。多数种的染色体资料为国内首次报道。 相似文献
18.
黄精属5种植物的核型研究 总被引：2，自引：0，他引：2
本文报道了安徽省黄精属Polygonatum Mill．5种植物的染色体数目和核型。玉竹P. odoratum
(Mill.)Druce黄山材料2n=16=10m(3sc)+6sm，滁县琅琊山材料2n=18=10m(1sc) +2sm+6st(2sc)，二者均属2B核型．
长梗黄精P．filipes Mirr. 黄山材料2n=22=8m+8sm(2sc)+6st，属3B核型，安徽繁昌材料2n=14=10m+4sm和2n=16=8m
+4sm+4st，二者均属2B核型。多花黄精(P.cyrtonema Hua)安徽黄山材料2n=20=8m+6sm+6st和2n=22=6m+8sm
+4st+4t，二者均属3B核型，安徽滁县琅琊山材料2n=18=8m(2sc)+6sm+4st，属2B核型。长苞黄精(P．desoulayi kom．)
2n=22=10m(2sc)+6sm(1sc)+6st，属3B核型；轮叶黄精(P．verticillatum(L．)All．)2n=18=2m+2sm+10st+2t+2T和2n=24=6m+4sm+12st+2T，二者均属3B核型。其中玉竹2n=16，长梗黄精2n=14和2n=22，长苞黄精2n=22，轮叶黄精2n=18的染色体数目和核型均为首次报道。 相似文献
19.
本文是继中国始苏铁Primocycas chinensis Zhu et Du之后，又报道一种古植物文献未见记载的早二叠世晚期苏铁科小孢子叶球，命名为古生铁花(新属、种)Cycadostrobilus paleozoicus Zhu，gen. et.sp．nov．标本采自我国山西省太原市东山煤矿的下石盒子组，它是世界迄今已知的一种最古老的小孢子叶球化石。和本新属同层发现的化石，除了中国始苏铁之外，还有楔叶Sphenophyllum、齿叶Tingia，楔羊齿Sphenopteris、楔叶羊齿Sphenopteridium、织羊齿Emplectopteris、栉羊齿Pecopteris、大芦孢穗Macrostachya、科达Cordaites、带羊齿Taeniopteris、角籽Cornucarpus和几种也未见记载而形态又非常特殊的植物。本文认为当前报道的古生铁花(新属、种)很可能和中国始苏铁同属一种植物，其营养叶可能是疏脉带羊齿Taeniopteris norinii Halle。 相似文献
20.
本文报道四川、陕西、河北的百合科黄精族4属6种的染色体数目和核型。Disporum megalant-
hum 2n=16=2m(1SAT)+6sm(1SAT)十8st(3SAT)and 2n＝16=2m(1SAT)+8sm(3SAT)+6st，
3B型；Disporopsis pernyi 2n＝40=23m(2SAT)+15sm(2SAT)十2st+2t(2SAT), 2B型；Disporo-
psis aspera 2n=40=30m十8sm(2SAT)+2t(2SAT)，2B型；Maianthemum bifolium 2n=36＝
20m＝10sm十4st十2t(2SAT)，2B型；Palygonatum odoratum 2n=20=10m+10sm(3SAT)，2B
和2n＝20＝12m(4SAT)+8sm(2SAT)， 2B型；Polygonatum humile 20=20+10m(2SAT)十
6sm(2SAT)+4t，2B型。从染色体角度，并联系形态特征，对Disporum属中分别见于东亚和北美
的两个类群的关系作了讨论。也讨论了Disporopsis种间在核型不对称趋势与形态特化之间可能的关系。 本文还指出Polygonatum odoratum和Polygonatum humile种内核型的多变性。 相似文献