科达科

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。

Some giant horsetails and Cordaitales reached nearly 100 feet.

有些巨大的木贼类和科达目植物高度达到一百英尺。

The authors consider that they are all new types of cordaitean cuticles.

讨论了这3种新的科达植物分散角质层所具有的古植物学意义。

Comparison of these three kinds of cordaitean cuticles with the known ones from the Cathaysian Flora in China and from the Euramerican Flora is made.

将这3种科达植物分散角质层与已知的欧美植物区和中国华夏植物区的种类进行了对比，认为它们都是新的类型。

In this paper, three kinds of dispersed cordaitean cuticles are described in detail from the Permian coal-bearing strata in China.

到目前为止，中国华夏植物区总共描述了4种科达植物原位角质层和3种分散角质层。

Up to now, four types of cordaitean cuticles in situ and three types of dispersed ones have been reported from the Cathaysian Flora in China.

到目前为止，中国华夏植物区总共描述了 4种科达植物原位角质层和 3种分散角质层。

However compared with the Euramerican Flora, the research work on cordaitean cuticles from the Cathaysian Flora in China is much more insufficient.

但与欧美植物区相比，有关中国华夏植物区科达植物角质层的研究工作还较薄弱。

However compared with the Euramerican Flora, the research work on cordaitean cuticles from the Cathaysian Flora in China is much more insufficient.

中国华夏植物区科达植物的研究历史虽然最早可上溯至1883年，但直到1991年才首次报道其角质层构造。

Reduction of ovule number as a tendency of speciation in the genus is substantiated by the occurrence of tri_ovulate cones coupled with comprehensive characters of the genus. The metamorphic patterns as well as the leaf nature of the outer envelope indicate that female cones of Ephedra are compound while the female reproductive units of the ovulate cone have been reduced from secondary reproductive shoots similar to those of cordaites by phylogenetic transformation, fusion and reduction. Each fertile bract together with its axillary female reproductive unit composed the Bract Scale and Seed Scale Complex of Ephedra .

基于返祖性畸形三胚珠球花的出现及其他形态特征，认为麻黄属胚珠数目减少是该属内物种特化的一个趋势；利用雌球花发育的畸形现象及外珠被的形态学本质提出麻黄属的雌球果为复轴性构造，雌性生殖单位是由类似于科达类的次级生殖枝构造经系统发育变态、融合、简化成现存的生胚珠构造式样，每一可育苞片及其腋内雌性生殖单位共同组成了麻黄属的苞鳞_种鳞复合体。

Here's one example:'So your Sturm und Drang is wrapping the very symbol of historical unrest?

下面是一个例子：所以您的斯图姆北达科仗是包装的历史动荡的象征'？

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。