石松类

Type and sole genus of the Selaginellaceae; evergreen mosslike plants: spike moss and little club moss.

卷柏科的单一模式属；常绿的类似藓类的植物；小石松。

Gemmate are small dispersal units consisting of one to several cells, often forming disks, plates, or filaments.

胞芽：1。是苔藓类和石松门植物产生的一种繁殖体结构，它是由一到多个细胞组成的传播体。

Fern species are usually distinguished by their leaf shapes, venations, scales, sporangia, and indusium, etc.

蕨类又分为真蕨和拟蕨两类；前者孢子囊生长在叶片，包括一般常见的蕨类；后者的孢子囊长在茎干上，包括其他石松科、卷柏科、水韭科及木贼科。

The Rhynie Chert has been radiometrically dated at 396 Ma. Plants remains show excellent cellular preservation. Three groups of plants are represented: the Rhyniophytes, the Zosterphyllophytes and a lycopod.

莱尼碎石的同位素顶年结果为 3.96亿年，其中化石植物保存有精美的细胞结构，主要的植物代表类群有莱尼蕨类，工蕨类和石松类。

The chemical constituents of Huperzia serrata Trev. are mainly flavonoids, triterpenoids and alkaloids. In order to get further comprehension of lycopodium alkaloids, we studied the low-polar section of the alkaloids extraction of Huperzia serrata and 19 alkaloids were isolated by ways of silica gel, RP-18 and Sephadex LH-20 etc. All of their structures, including five new compounds and two known ones that were firstly found from this genus, were elucidated with the help of Mass, IR, NMR spectra and so on. The five new alkaloids (HS-07, HS-08, HS-09, HS-10 and HS-11) are belonged to lycopodine class. The other two ones that were new to this genus (HS-18 and HS-19) are belonged to miscellaneous group.

蛇足石杉的主要化学成分为黄酮，三萜和生物碱，为进一步了解该植物的生物碱成分，我们研究了蛇足石杉氯仿总碱低极性部位的生物碱成分，运用正相硅胶、反相RP-18、凝胶LH-20等方法分得了19个生物碱，并通过质谱、红外、核磁共振等波谱鉴定了它们的结构，其中5个为新化合物，2个为首次从该属植物中分离得到的化合物，所分得的新化合物：HS-07、HS-08、HS-09、HS-10和HS-11均为lycopodine类石松生物碱，首次从该属植物中分得的化合物为miscellaneous类：HS-18和HS-19。

Selaginellales An order of the Lycophyta containing the single living genus Selaginella, sometimes called spike-mosses, with about 700 species, found worldwide, but especially in the tropics.

卷柏目：为石松亚门下一目，该目仅有单属卷柏属，常被称为卷柏。这类植物有700多种，分布广泛，以热带居多。

Eusporangiate Describing the condition, found in clubmosses, horsetails, and certain ferns in which the sporangia develop from a group of initial cells and do not have an elaborate spore dispersal mechanism.

厚囊蕨：用来描述发现于石松纲、木贼类以及一些蕨类植物，其孢子囊由一组原始细胞发育而来，没有复杂的孢子散布机制。

Nonetheless, the result showed that Pinus, Ginkgo, Cycas form a monophyletic group, which is sistered to angiosperms. Together, they from a clade that is sistered to Gnetales.

邻近连接法和贝叶氏导出氏分析结果将松叶蕨、瓶尔小草，和生根卷柏的matK序列一起形成一个单源群，同属石松类的过山龙与生根卷柏序列并未形成姐妹群。

Lycophyta (Lycopodophyta; Lycopsida) A phylum of spore-bearing vascular plants containing about 1000 living species and 6 genera, mostly found in tropical regions.

石松门：具有孢子的维管植物的一个门，现存的石松类植物大约有1000多个种，六个属，绝大多数分布在热带地区。

Type and sole genus of the Selaginellaceae; evergreen mosslike plants: spike ''.

卷柏科的单一模式属；常绿的类似藓类的植物；小石松。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。