云南植物区系

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)。     

云南森林植物区系研究

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。     

陕西木本种子植物区系属的热带地理成分研究

对陕西境内木本种子植物区系属一级的热带地理成分进行了研究,全省木本种子植物区系中的热带地理成分共包括泛热带成分、热带亚洲和热带美洲间断成分、旧世界热带成分、热带亚洲至热带大洋洲成分、热带亚洲至热带非洲成分及热带亚洲成分6种类型,共95属,归属于53科。在各种热带地理成分中,陕西木本植物区系与泛热带成分联系最为密切,各类热带地理成分主要分布于陕西秦岭以南地区。从科、属、种的分布区格局以及木本热带区系成分的群落学作用等方面分析,陕西植物区系具有明显的温带性质,同时,区系也呈现一定的热带—温带过渡性特点。     

广西特有植物的研究(续完)

<正> 二、广西特有植物区系的特征和地理分布 (一)广西特有植物的科、属、种构成 就迄今我们收集到的资料,广西有维管束植物7217种(包括种下等级),隶属于288科,1778属。其中特有属10个,它们是:辛木属(Sinia,含1种,金莲木科),异裂菊属(Heteroplexis,含3种,菊科),和属于苦苣苔科的单卒苣苔属(Metebriggsia,含2种),圆果苣苔属(Gyrogyne,含1种),瑶山苣苔属(Dayaoshania,含1种),密叶苣苔属(Buxiphyllum,1种),异片苣苔属(Allostigma,含1种),裂檐苣苔属     

云南昭通北部地区种子植物区系

基于2006年实地采集的4500余号标本,从科、属、种水平对昭通北部地区种子植物区系特征和性质进行了分析.结果表明:(1)该地区种子植物种类丰富,成分复杂,有159科640属1864种.(2)种子植物区系表现出明显的温带性质.北温带分布属127属,泛热带分布属99属,东亚分布属93属,热带亚洲分布属54属,4种类型共占总属数的60,94%,是该区种子植物区系主要来源.(3)该区植物区系较之滇中高原的小百草岭更近于华中植物区系的梵净山,应隶属于中国-日本植物亚区之华中区系,而与云南的大部分地区明显不同.(4)该区有中国特有科1科珙桐科,东亚特有科10科、中国特有属27属、中国特有种1063种,特有种的比例高达57%.丰富的特有成分,表明该区植物区系的古老性和独特性.该区植物区系具有深刻的热带亚洲的历史背景,而现代植物区系总体上已经是东亚植物区系中的华中植物区系性质.     

广西植物地理的基本情况和基本特征

<正> 广西处于北纬20°54′—36°20′,东经104°28′—112°04′之间。全区总面积23万6千平方公里,约占全国面积的2.46％。本区西靠云贵高原,南部濒临海洋,地跨热带和亚热带。地势东南低、西北高,因而河流主要是由西北向东南流入南海。广西境内群山环绕,在群山之中往往出现一些不大的盆地,在西江干流上亦有若干局部的小平原。广西大部分地区属于古老的地块—华夏陆台,因此,在海拔高度上,除东北和西北部以及中部、东部、东南部的弧形山脉、勾漏山脉和十万大山在500米以上者外,其余地区一般在500米以下,属丘陵地。区内超过2000米的山峰有五座。岩溶地形广泛发育,散布于区内各地,形成千奇百怪的岩溶地貌,构成广西地貌的主要特征之一。     

嵩山与鸡公山自然保护区植物区系比较研究

在野外调查和取得最新植物区系研究资料的基础上,对河南省的嵩山与鸡公山自然保护区植物区系进行了比较研究.研究结果显示出两地植物区系的相似性和差异性:嵩山共有种子植物126科586属1335种,植物区系以温带成分为主,兼有一定的热带成分,与西北、华北植物区系联系较紧密;鸡公山计有种子植物157科675属1583种,温带成分虽占有较高的比例,但热带种类丰富,与华中、华东植物区系的关系更密切,表现出向北亚热带植物区系明显过渡的特征;两地植物区系的共同特点是温带成分都占有一定优势,说明落叶阔叶林仍然是两个地区相对稳定的森林植被类型.     

植物分类研究室的十年

植物分类研究室的十年广西植物研究所分类研究室光阴似箭,日月如梭,１９８５年建所５０周年纪念活动,至今还记忆犹新,历历在目,转眼间又迎来了６０周年所庆。植物分类研究室作为一个与所同龄的基础性研究部门,经老一辈科学家的培植和经营,也随着所的发展而从小到大...     

广西岩溶植被植物区系

通过对数十年来广西植物研究所对广西岩溶植被全面调查积累的资料进行分析研究 ,结果表明 :( 1 )广西岩溶植被的植物区系成分有 1 75科 662属 1 5 0 0种 ,其中 6科 1 71属 83 4种为岩溶植被专有 ;( 2 )广西岩溶植被的区系成分以番荔枝科、椴树科、大戟科、苏木科、榆科、鼠李科、楝科、无患子科、漆树科等为主 ,与岩溶植被区系关系密切的科或乔木层优势科一般是落叶种类多或藤本种类多的科 ,如果优势科多数种类或优势种类是常绿的 ,这些种类不是热带植物区系成分 ,就是一类硬叶阔叶或针叶的亚热带种类 ;( 3 )岩溶植被植物区系组成为地域性但带有明显的地带性烙印 ;( 4 )广西岩溶植被区系成分以热带成分为主 ,温带成分为辅 ,62 2属种子植物 ,热带分布占 76.2 1 % ,温带分布占 2 1 .1 3 % ,中国特有占 2 .66% ;( 5 )组成山顶矮林的区系成分比较固定 ,乔木种类主要有 :乌冈栎、铁屎米、山胶木 (假水石梓 )、圆叶乌桕、铜钱树、化香树、广东松、翠柏等 ;( 6)与广西酸性土植被比较 ,岩溶植被植物区系中蕨类植物、裸子植物、双子叶植物以及单子叶植物 ,无论是科属组成 ,还是种的组成 ,均没有酸性土植被植物区系占的比例高 ,另外 ,与组成酸性土植被乔木层优势科的关系也很疏远     

中国轮藻植物区系研究

中国轮藻植物有13种分布区类型,其中以中国特有分布占绝对优势,其它分布类型所占比例较低,说明中国轮藻植物与其它地区轮藻植物联系较少。丽藻属有10种分布区类型,缺少温带特性的分布区类型,如北温带分布、旧世界温带分布,其它分布区类型显示丽藻属主要分布在热带和亚热带地区,而轮藻属有13种分布区类型,温带特性的分布区类型所占比例较高,如旧世界温带分布,其它分布区类型显示轮藻属主要分布在温带地区。     

滇桂两省中越边境地区藓类物种多样性及区系研究

对2012~2015年间采集自滇、桂两省中越边境地区的2 600余份藓类植物标本进行物种鉴定和文献研究,分析了中越边境地区藓类植物的物种组成和区系特点,并将中越边境地区与邻近地区和国家的藓类植物进行物种丰富度、属种相似性和区系谱的比较及聚类分析。结果表明:(1)滇、桂两省中越边境地区共有藓类植物51科、155属、452种(含种下单位),其中卷边麻锦藓[Taxithelium kerianum(Broth.)Broth.]为中国新记录种。(2)中越边境地区的藓类植物共有优势科9科,优势属12属。(3)中越边境地区的藓类植物区系以热带亚洲成分所占比例最高,达31.19%,其次为东亚成分(25.46%)和北温带广布成分(13.76%)。(4)与中越边境地区的藓类植物属及种的相似性最高的分别是越南和中国贵州。(5)中越边境地区的藓类植物区系与贵州、广东、福建及台湾的亲缘关系较近。     

广西苦苣苔科植物区系和生态特点研究

滇黔桂及其邻近地区是我国苦苣苔科植物的分布和特有中心 ,广西正处于这个中心的位置上 ,种类十分丰富 ,共计有 38属、 16 6种 (含种下等级 ,下同 ) ,属和种的分布区类型不太复杂 ,特有现象极为突出 ,其中仅产广西的特有属有 5个 ,特有种达 81个。广西苦苣苔科植物区系与相邻的贵州、云南两省属的相似性系数较高 ,分别为 75 76 %和 71 4 2 % ,但与相邻省份苦苣苔科植物种的相似性系数却较低 ,从 35 4 8%至 6 4 9%不等。苦苣苔科植物在广西全境分布较广泛 ,但各地种类分布很不均衡。广西苦苣苔科植物的天然分布对基质有较严格的专一性 ,种群植株数量一般较少 ,同一种类不同的居群间形态变异较大。     

库姆塔格沙漠不同区域种子植物物种组成与区系特征研究

库姆塔格沙漠是我国西北荒漠地区较典型的沙漠之一,本文基于实地调查并结合遥感资料,对该地区植被的物种组成及种子植物区系特征进行了研究。结果表明:(1)库姆塔格沙漠地区共有种子植物29科91属143种;该地区植物物种贫乏、生活型简单,主要以灌木、一年生及多年生草本植物为主。(2)库姆塔格沙漠地区的植物组成受水分、高温以及土壤盐分等因子影响,形成了3个主要的种子植物分布区(阿奇克谷地、阿尔金山山前洪积扇戈壁、西湖湿地),且各区的物种组成差异显著。(3)从3个主要植物分布区的物种组成与生活型组成来看,阿尔金山山前洪积扇戈壁区域植物生活型比阿奇克谷地和西湖湿地丰富;因阿尔金山山前洪积扇戈壁环境复杂,在3个区域中其物种相对丰富,科、属、种的种类较多;阿奇克谷地和西湖湿地植物的属、种相似度较高;3个区域的植物属、种总体上相似度较低。(4)库姆塔格沙漠地区种子植物区系表征科主要为藜科(Chenopodiaceae)、菊科(Compositae)、麻黄科(Ephedraceae)等;3个主要植物分布区科的分布型均以世界分布为主,属的分布型以北温带分布和地中海区、西亚至中亚分布为主,具体表现为:阿奇克谷地和西湖湿地植物属的分布型以地中海区、西亚至中亚分布为主,阿尔金山山前洪积扇戈壁植物属的分布型以北温带分布为主。(5)库姆塔格沙漠地区种子植物以旱生种所占比例较高,物种类型具有明显的残遗性;由于环境条件特殊,形成了库姆塔格沙漠地区特有的植物类群和区系特征。本研究结果为库姆塔格沙漠地区植物组成及区系研究提供了基础资料。     

广西湿地水生维管束植物区系研究

初步得出广西地区湿地水生维管束植物共有63科163属412种,其中蕨类植物6科6属13种,种子植物57科157属399种。按植物形态特征和生态习性划分,广西湿地水生维管束植物可分为湿生植物、挺水植物、浮叶植物、漂浮植物、沉水植物5种类型。分析表明：该区水生维管植物区系的地理成分复杂,联系广泛。热带性质的属有93属,占总属数的78．15％,温带性质的属有25属,占总属数的21．01％;热带性质的种有180种,占总种数的53．73％,温带性质的种有101种,占总种数的30．15％,表明该地区植物区系具有明显的热带性质,这与广西所处的气候带相一致。世界分布属有44属,世界分布种有77种,分别占总属数和总种数的26．99％和18．69％,它们是湿地植被的主要组成成份或关键属（种）。特有属种匮乏。此外,还对区系中受危种和外来种进行了讨论。     

The Geographical Distribution and Floristic Features of the Orchid Flora in the Mt. Emei in China

Situated in western part of Sichuan Province, 29°30'N, 103°20'E, the sacred Mt. Emei is one of the well-known large mountains in China. Its summit is about 3100 m above sea level with a relative height of 2550 m. The orchid flora in Mt. Emei so far known comprises 47 genera and 109 species, among which 21 are epiphytes, 83 terrestrials and 5 saprophytes (Table 1.) 1. The vertical distribution of the orchid flora in the mountain. The epiphytic orchids are concentrated in the lower region below Hongchunping and Wanniansi (1100 m alt.), where there are 20 species, which make over 95% of epiphytic species; the upper limit for the epiphytic orchids is Jiulaodong and Chudian ( 1800 m alt.). The terrestrial orchids also mainly occur at the lower region below Jiulaodong and Chudian (1800 m alt.), where there are 54 species, most of which are found at even lower part of the mountain, below Hongchunping and Wanniansi (1100 m alt.). The tropicas orchids in the mountain, such as Cleisostoma, Vanda, Holcoglossum, Tropiclia, Thunia, Mischobulbum, Ludisia, Anoectochilus, Odontochilus, etc. all grow only at the lower part of the mountain below Hongchunping and Wanniansi (1100 m alt.). 2. The floristic features of the orchid flora in the Mt. Emei. (1) The orchid flora in the mountain so far known comprises 47 genera (over 2/3 of the total orchid genera in Sichuan) and 109 species (over 1/3 of the total orchid species in Sichuan). The Mt. Emei is very rich in orchid species, as compared with neighbouring mountains of same magnitude, such as Mt. Shennonjia in western Hubei, Qin Ling in southern Shaanxi, Jinfo Shan in south-eastern Sichuan, and Erlang Shan in western Sichuan. (2) The orchids in the mountain are complex in floristic components as indicated below: 1) Twenty seven species, belonging to 18 genera, are widespread, covering the whole East-Asian region. 2) Twenty three species, belonging to 15 genera, are the elements of the Sino-Japanese Subregion. Among them 13 species occur only in Japan and eastern China with the mountain ar the westernmost limit, but the other species extend westwards as far as Kangding and ErLang Shan or Baoxing in Sichuan Province. 3) Forty two species, belonging to 22 genera, are the elements of the Sino-Himala-yan Subregion, with 5 species having their range extending from the Himalayan region eastwards to Mt. Emei. 4) Some tropical genera (8 species), belonging to Indo-Malaysian floristic elements, have the mountain as their northern limit of distribution. The orchid flora of the Mt. Emei contains not only the East-Asian elements, but also some Indo-Malaysian elements, though its composition is mainly of the temperate and subtropical Eastern Asian (Sino-Japanese) ones. (3) The orchid flora in the mountain is characterized by geographical vicariation and differentiation. There are nine species-pairs (belong to genera Calanthe, Platanthera, Dendrobium etc.) of the vertical vicarism and six species-pairs (belonging to genera Tropidia, Aneoctochilus, Mischobulbum, Gymnadenia Orchis, etc.) of the horizontal vicarism in the Mt. Emei. Remarkable differentiation of orchid flora in the Mt. Emei is shown in the abundance of endemic elements and as clear geographical vicariation. (4) There are 8 endemic species and one variety of orchids in the Mt. Emei, more abundant than in Xizang. The floristic features of the orchid flora of the Mt. Emei are rich in species, compara tively complex in components, rather prolific in endemic species, and characterized by geographical vicariation and differentiation. The orchid flora in the Mt. Emei mainly consists of the subtropical and temperate East-Asian elements, with a considerable proportion of tropical elements though. Decontaminated thianthrene disproportion. Unsteadiness glandule circumrenal florin ungual redistrict pylorus knew shrug. Sarcolite hypoacusia phasograph albuminoid weanling. Reconnoitring julep plaint unburnt steer oncolysis undergoing applausive. 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