摘要
菱科仅有一个菱属,在国外文献中,过去都把它记载为:“沉水叶、对生、羽裂、根状”,但作者经过多年观察研究,认为它实际上是托叶的变态,是由沉浸水中的托叶伸长而边缘增厚,产生许多小瘤状生长点生长发育而成,着生在真正沉水叶的叶根两侧。本文详细描述了上述发育过程并加以讨论。
Trapaceae has only one genus.It was described as“submersed leaf, posite,pinnatifid,and radiciform”in the literatures at home and aproad.In fact,after observing and studying tge genus for several years, the author considers that the genus is not a submersed leaf but a modified stipule which develops from a submersed stipule with lengthening and thickening margens to form a lot of minuscular,nodular growing points which attach to the either side of the submersed leaf scars,In this paper,the author describes and discusses the developing process of trapa L.in detail.
关键词
菱
沉水叶
变态托叶
角
倒剌
embryo
submersed leaf
modified stipule
horn
obverse spine
