茎叶植物的

F. bidentis leaf was of isobilateral type, and had thicker epidermis cell wall and cuticle, obvious cryptopores, and highly developed palisade tissue, with typical C4-plant Kranz anatomy. The collenchymas and vascular tissue in stem and the aerenchyma in root were well developed. Secretory structure was found in all vegetative organs. According to the analyses of soil physical and chemical properties and relevant ecological factors, F.

结果表明：黄顶菊叶片表皮具较厚的角质层、下陷气孔，叶片为等面叶、全栅型，叶肉细胞环绕维管束鞘细胞紧密排列，是典型C4植物的Kranz花环结构；茎中厚角组织和维管组织发达，根中还存在通气组织；根、茎、叶中均存在分泌结构。

The results offer the condition that these plants of Ajuga could be distinguished by size and ornamentation of exhymenine.

结果表明，同属三种植物的形态特征相似，可通过叶形及花期是否具基生叶，花萼的形态，花冠颜色以及茎的生长方式和植株被毛情况等予以鉴别；通过对三种植物的花、根、茎、叶及全草粉末的组织构造观察，认为种间差异较小，可依据毛茸的分布及形态特征和茎的木化程度不同加以鉴别；对三者花粉粒进行了扫描电镜观察，发现其大小和外壁纹饰具有明显差异，为三者的鉴别提供了有力的依据，也为该属的分类及植物花粉形态研究提供了花粉形态学方面的资料。

Any of several plants of the genus Brodiaea having basal grasslike leaves and globose flower heads on leafless stems resembling those of genus Allium.

卜若地属几种植物中的任何一种，具基生草状叶，在类似葱属植物的无叶的茎干上长有球形的头状花序。

A hydroponical experiment was carried out to study the toxicity of copper, cadmium and their combined pollution on ultrastructure of Commelina bengalensis Linn. Transmission Electron Microscope was used to investigate the effect of heavy metal on ultrastructure of different parts of plants.

为了解铜、镉对泡泡草根、茎、叶细胞亚显微结构的毒害及作用位点，以期为进一步研究鸭跖草属植物的耐重金属机理提供理论基础，本文通过透射电子显微技术研究了75 μmol·L-1铜和50μml·L-1镉及其交互污染对泡泡草根、茎、叶细胞超微结构的影响和铜、镉在细胞中的分布。

The xeromorphic structures of epiderm appeared as follows:thicker cuticle,developed epidermal hairs,hollow stomas,large stomatic chamber.

按其适应沙生环境的形态结构特点，可以分为薄叶植物、多浆植物、肉茎植物以及卷叶植物等4类。

An observation and analysis of series of characteristics coming from sixteen species belonging to five genera of Polypodiaceae subfam.Polypodioideae were undertaken in order to unravel the phylogenetic relationships within this group.

对水龙骨科水龙骨亚科5属16种植物的孢子形态、叶表皮结构、叶柄和根状茎的横切、根状茎上的鳞片以及叶脉特征进行了详细的观察和分析，探讨了该亚科植物的系统位置和亲缘关系。

Result:The stomatic density and characteristic of leaf epidermis and stem epidermis in six Ephedra species was differenc,there were no ob...

结果：6种麻黄属植物之间气孔密度、茎、叶表面特征存在不同程度的差异；气孔表现出典型旱生植物的特征，略下陷，气孔保卫细胞被厚的角质层覆盖，并形成突起状角质唇状物；气孔大小、形状在种之间无明显区别；叶表面、茎表面气孔均属于无规则型，但形状明显不同，前者主要呈长方形或六边形，后者为窄条形或哑铃形。

Result:The stomatic density and characteristic of leaf epidermis and stem epidermis in six Ephedra species was differenc,there were no obvious morphological differences in stoma shape and size.

结果：6种麻黄属植物之间气孔密度、茎、叶表面特征存在不同程度的差异；气孔表现出典型旱生植物的特征，略下陷，气孔保卫细胞被厚的角质层覆盖，并形成突起状角质唇状物；气孔大小、形状在种之间无明显区别；叶表面、茎表面气孔均属于无规则型，但形状明显不同，前者主要呈长方形或六边形，后者为窄条形或哑铃形。

For example, the basic angiosperm stem is vertical and elongated, but some cacti have swollen water-storing stems, while other xerophytic plants that have lost their leaves during the course of evolution have evolved flattened leaflike stems for photosynthesis, e.g.

例如被子植物的茎是垂直的，伸长的，但一些仙人掌具有膨大的能够储水的茎，另一些旱生植物在进化的过程中失去了叶子，但又发展为利用扁平叶状的茎来进行光合作用。

The results showed that the calorific values of the test plant species had no unified change pattern, which was possibly related to the partitioning ratio of calorific value in different plant organs and the timing when the reproductive period appeared. In general, spike had a higher calorific value than leaf and stem, and aquatic plants had obviously lower calorific value than mesophytes and wet mesophytes. Within a species, the change pattern of calorific value had certain relations to the phenophase, with approximately two lowest values and two highest values. Among the species, the differences in the calorific value were decided by the nature of the species themselves. Under the same habitat and climatic conditions, the species that contained more materials rich in energy could more easily accumulate calorific, and thus, more adaptable to grow under this environment.

结果表明：各物种的热值动态变化规律并不是统一的，这种变化可能与植物各器官热值的变化及生殖期出现的时间有关；各植物器官的热值普遍表现出穗的热值大于茎和叶；水生植物的热值明显小于中生性和湿中生性植物；种内热值变化随物候期变化有一定的规律，大约会出现2次低值、2次高值；种间热值差异是由于植物本身性质决定的，在相同生境和气候条件下，植物体中含能物质越多，就越易积聚热值，从而更适宜生长在此环境。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失