The results show that the content of fern spore positively,but gymnospermae pollen negatively correlated to bituminous "A" and resin,which also indicate that,although all the former organism do have the ability of hydrocarbon generation,there are obviously differences of the contribution to the soluble hydrocarbon.
结果表明:蕨类孢子含量与氯仿沥青“A”和非烃正相关,与饱和烃、芳烃则显著负相关,而裸子植物花粉则反之。
The seed ferns included treelike forms.
种子蕨类植物包括树状类型的植物。
an extinct seed-producing fernlike plant of the order Cycadofilicales (or group Pteridospermae).
苏铁属（或凤尾蕨属）的一种已经灭绝的类似于蕨类的种子植物。
fern with elongate silvery outgrowths enclosing the developing spores.
包围孢子生长的一种蕨类植物。
large coarse fern often several feet high; essentially weed ferns; cosmopolitan.
高达几英尺的一种大型粗壮蕨类；基本上是种子蕨；遍布全球。
Psilophyta (whisk ferns) In the Five Kingdoms classification scheme, a phylum of vascular seedless plants, the whisk ferns.
裸蕨植物门(松叶蕨)：在五界分类系统中，一门不产生种子的维管植物，松叶蕨。
Any of various vascular plants that reproduce by means of spores rather than by seeds, including the ferns and related plants, such as club mosses and horsetails.
蕨类植物任一种通过孢子而不是种子繁殖的维管状植物，包括蕨类和相关的植物，如石松和马尾
1 species: sensitive fern; in some classifications included in Polypodiaceae.
一个种；球子蕨；在一些分类中，包括在水龙骨科内。
Studies on Tissue Culture, Rapid Propagation and Gametophyte Development of Several Ferns;
几种蕨类植物的组培快繁和配子体发育研究
Studies on the Spores Propagation of Ornamental Ferns and Drought Resistance of Several Ornamental Ferns in Nanjing City;
南京市几种蕨类植物孢子繁殖及抗旱性研究
a fern of the genus Dryopteris.
鳞毛蕨属的一种蕨类植物。
in former classifications: comprising plants with a vascular system including ferns and fern allies as well as seed plants.
用于旧的分类中；由有维管的植物组成，包含蕨类和蕨类联盟以及种子植物。
a spleenwort of eastern North America.
北美东部的一种蕨类。
North American fern.
一种北美的蕨类植物。
Ferns reproduce by spores.
蕨类植物用孢子繁殖.
Ferns reproduce themselves by spores.
蕨类植物用孢子繁殖。
A place or container in which ferns are grown.
蕨类种植处蕨类植物生长的地方或容器
east Asian fern having fronds shaped like tongues; sometimes placed in genus Cyclophorus.
东亚蕨类植物，有舌头形状的叶子；有时被放在c种类中。
Blackboys sprouted out of the thick undergrowth of ferns and jungly-looking plants.
“黑孩子”（一种树木名称）在蕨类和丛林样子的植物里茂盛成长。