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叶柄

狗蔷薇Rosa canina)的叶片,显示其叶柄、两块叶片形的托叶及五片小叶。
Acacia koa英语Acacia koa的叶柄

叶柄Petiole/ˈptil/)是一个植物学的名词,指连接叶片与节点的部分[1][2]。这部分通常都与茎有着相同的内部构造。在叶柄两侧的延伸部分叫作托叶,如果这些托叶呈鞘状卷曲起来,会叫作托叶鞘。欠缺叶柄的叶片会形容为无柄sessileepetiolate),而如果叶柄将部分的茎卷起来,会称呼为抱茎禾本科的抱茎具有被称为小舌的外部构造。

半夏的珠芽位于叶鞘处[3]

语源

Petiole这个词源自拉丁语petioluspeciolus,意思是“小脚”或“茎”,亦是“脚”pes的diminutive form。

参考文献

  1. ^ Beentje, H. The Kew plant glossary. London: Kew Publishing. 2010: 87. ISBN 9781842464229 (英语). 
  2. ^ Mauseth, James D. Botany: An Introduction to Plant Biology. Jones & Bartlett Learning. 2003: 171. ISBN 0-7637-2134-4 (英语). 
  3. ^ 马锡成. 洪家耀 , 编. 香港有趣植物2 初版. 香港自然探索学会. 2016-07: 37. ISBN 978-988-15468-8-3 (中文(繁体)). 

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叶柄
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