Among thein , 2 species and 1 species are respectively pteridophyta and gymmospermae . all the others are angiosperm . the number of genera and species amount to 97 . 27 % and 97 . 87 % of all the genera and species of the wetland 其中蕨类植物2种，裸子植物1种，而被子植物的属数和种数分别占南大港湿地植物总属数和总种数的97 . 27和97 . 87 。
Through investigation to west lake spot in huizhou , it showed that the pot had 127 species woody plant which belong to 48 families , including 6 families 8 species gymnosperm and 42 families 118 species angiosperm 摘要通过对惠州市西湖风景区的木本植物资源的调查，结果表明该景区的木本植物种类总类为48科127种，其中裸子植物有6科8种，被子植物有42科118种。
Hofmeister aso showed that the gametophytes and sporophytes of seed - bearing plants were homologous with those of ferns and mosses and that the gymnosperms formed a plant group between the latter and the angiosperms 他认为种子植物的孢子体和配子体与蕨类以及苔藓类是同源的，还指出裸子植物形成了一个单独的组群，它是位于蕨类植物与被子植物之间的一个植物类群。
Cycadophyta ( cycads ) a phylum of cone - bearing gymnosperms ( about 75 living species ) with palmlike compound leaves and special coralloid roots at or near the ground surface , which contain symbiotic nitrogen - fixing cyanobacteria 苏铁纲（苏铁类植物） ：包含球果的一类裸子植物（现存种大约有75种） ，它们具有掌状的复叶，在近地面处有特殊的珊瑚状的根，根内含有共生的固氮蓝细菌。
Forests sometimes contain many tree species within a small area ( as in tropical rain and temperate deciduous forests ) , or relatively few species over large areas ( e . g . , taiga and arid montane coniferous forests ) 作为普遍规则，受被子植物支配的森林（阔叶林）比那些受裸子植物支配的森林（松树或针叶林）物种丰富，虽然有例外存在（例如，种类匮乏的白杨和桦树生长在北纬度地区） 。
There are 1267 species of seed plants belonging to 528 genera in 121 families , including gymnosperms ( 9 species , 6 genera and 4 families ) and angiosperms ( 117 families , 522 genera and 1258 species ) in laojun mountain nature reserve in pingshan county , sichuan province 摘要通过野外调查和查阅资料，四川省屏山县老君山自然保护区有种子植物121科528属1267种，其中裸子植物4科6属9种；被了植物117科522属1258种。
Ginkgo biloba . l , locally known as baiguo and gongsun tree , is special rare plan in china . at presellt , only one section , one category , one genus exists , so it is called " living fossil " of gymnospenn and be of vital scientific value in botany 银杏( ginkgobiloba )又名白果、公孙树，是我国特有的珍贵孑遗树种，也是目前世界上珍稀裸子植物之一，现仅存一科一属一种，素有裸子植物“活化石”之称，在植物学上具有重要的科学价值。
As a general rule , forests dominated by angiosperms ( broadleaf forests ) are more species - rich than those dominated by gymnosperms ( conifer or needleleaf forests ) , although exceptions exist ( for example , species - poor aspen and birch stands in northern latitudes ) 作为普遍规则，受被子植物支配的森林（阔叶林）比那些受裸子植物支配的森林（松树或针叶林）物种丰富，虽然有例外存在（例如，种类匮乏的白杨和桦树生长在北纬度地区） 。
The gymnospennous flora of jiangxi province comprises 7 families , 22 genera and 32 species ( including 1 endemic family , 5 endemic genera and 20 endemic species ) , accounting for 58 . 3 % , 53 . 66 % and 13 . 75 % of corresponding taxa in china 摘要江西裸子植物自然分布7科22属驼种1变种（其中中国特有科1个为银杏科，特有属有银杏属、金钱松属、杉木属、水松属、白豆杉属等5个，特有种有银杏、华东黄杉、长苞铁杉、金钱松、水松等20种） ，分别占全国58 . 3 % 、 53 . 66 % 、 13 . 75 % 。
With the development of modem biological science and technology , great progress has been made in tissue culthe as an importam means of science study ginkgo is a gymnosperm , so its tissue culture is especially hard . at present , the research aboot ginkgo tissue culture and genetic transformation was limited and it has not been reported abollt its success , so it is very necessary to establish ginkgo regeneration system 随着现代生物技术的发展，植物组织培养作为一种重要的研究手段取得了可喜的进步，裸子植物银杏组织培养尤其困难。但目前银杏组织培养和遗传转化的研究并不多，成功的例子还没有。建立一个银杏的高频高效再生体系已是刻不容缓的事。
