石松

The outstanding nomenclatural problems in the Palaeozoic arborescent lycopsid Cyclostigma are discussed,which include four aspects:1valid publication and author citation of Cyclostigma;2synonym,homonym,and replacement name of Cyclostigma;3conservation of Cyclostigma;and 4typification of Cyclostigma.

文章讨论晚古生代木本石松植物圆印木属Cyclostigma命名中存在的突出问题，包括4个方面：1圆印木属的合格发表和作者引证；2圆印木属的异名、同名和替代名；3圆印木属的保留；4圆印木属的模式。

Botrychium, and in gymnosperms it pushes the embryo into the female gametophyte tissue.

某些种类的石松属植物(例如卷柏属 Selaginella)、少数蕨类(例如阴地蕨属 Botrychium)和裸子植物中胚柄将胚胎推入雌性配子体中。

The middle and upper layers may be composed of Lepidodendron , Cordaites, Calamites and some tree ferns or seed ferns.

群落的中、高层通常是石松纲和科达纲，楔叶纲中Calamites及某些树蕨和种子蕨。

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。

Lower vascular plants coextensive with the family Lycopodiaceae; in some classifications includes the Selaginellaceae and Isoetaceae.

与石松科同延的低等脉管植物；在某些分类中，包含卷柏目和水韭目。

Isoetales An order of the LYCOPHYTA containing two genera-Iso-etes, found in most parts of the world, and Stylites, found only in the Peruvian Andes.

水韭目：石松门植物的一个目，包括两个属，水韭属广布于世界各地，剑韭属仅分布于秘鲁安第斯山脉。

In some classifications included in Lycopodiales.

在某些分类中，归于石松目之中。

A family of ferns belonging to the order Lycopodiales.

属于石松属的蕨类植物一科。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。