Each leaf has b bud at its base that is able to develop into a subsidiary bulb 鳞叶整片的将茎紧紧围裹，鳞叶位于地上茎的基部。
2.
Variation law of stem diameter and internode length aboveground of carex pseudocuraica ramets under different water content 不同水分状态下漂筏苔草无性株地上茎粗和节长的变化
3.
The greens provide loads of nutrients produced in the stems above ground that are sent into the roots leading to vegetables of maximum nutritional value 绿色蔬菜会在地上茎中制造生成大量营养素，它们被送入根部使得蔬菜产生最大程度的营养。
4.
Conventional paraffin sectioning was adopted to conduct the anatomical examination of the officinal organs of houttuynia cordata , stems , rhizomes and leaves 摘要采用常规石蜡切片法，对鱼腥草的药用部位地上茎、根状茎和叶进行了解剖学观察。
5.
The stems and rhizomes were observed to differ in cortex - cell layer , perivascular fiber - ring presence , vascular cylinder and pith proportions , vascular bundle number and secondary growth and these differences were associated with their own physiological functions 地上茎和根状茎之间在皮层细胞层数、周维纤维柱的有无、维管柱和髓所占比例、维管束束数、次生生长等方面存在差异，这些差异与它们各自担负的生理功能相关联。
6.
And the viviparous plantlets of both species are formed for the differentiation of floral primodium , but the position if viviparous plantlets is different . for the species of polygonum viviparum l . , the viviparous plantlets are formed in the inflorences , while in saxifraga cernua l are in the leaf axils . on the results of observation for morphology and anatomy , vascular bundles of viviparous plantlet are connected with that of their parent 从来源和性质看，二者的胎生苗均由花原基直接分化形成；但从位置上看，珠芽蓼在花序中形成胎生苗，而珍珠虎耳草则在地上茎的叶腋部位形成胎生苗；从形态解剖角度观察，胎生苗的维管束与母体的维管束直接相连，胎生苗脱落时，其上已长出叶片1 - 3枚。
7.
The results show that the part of the heavy metal element cumulated in root tissue organ on the growth periods and the part of the heavy metal element discharged besides the plant body with the tissue organ of stem and leaf wilted on the growth periods of the anisodus tanguticus ( maxim . ) pascher 结果表明，山莨菪在生长周期内吸收的重金属元素并非全部蓄积在根组织器官中，部分重金属元素通过年生长周期内的生长发育而随着地上茎叶部分等组织器官的枯萎被代谢排出植物体外。
