Abstract Pollen morphology of 19 taxa of the genus Plantago was studied and documented in detail using scanning electron microscopy (SEM). The pollen grains are small to medium-sized (P = 18.7‒44.0 µm, E = 13.7‒34.2 µm), prolate-spheroidal to prolate (P/E = 1.05‒1.54 µm) in shape and pantoporate. Based on SEM observations of tectum ornamentation, three groups of taxa can be distinguished: the Ovata group with scabrate tectum, the Major group with coarsely verrucate tectum and the Lanceolata group with finely verrucate tectum. Multivariate analyses indicate that, the pollen morphology is not taxonomically significant at the subgenus and section levels, but it is useful for delimitation at the infraspecific level, and also for understanding the morphological diversity at the species level.

中文翻译：

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车前草（车前科）属的孢粉学研究

摘要 使用扫描电子显微镜 (SEM) 对车前子属 19 个分类群的花粉形态进行了详细研究和记录。花粉粒小到中等大小（P = 18.7-44.0 µm，E = 13.7-34.2 µm），扁长球状到扁长（P/E = 1.05-1.54 µm），呈泛孔状。根据对顶盖纹饰的扫描电镜观察，可以将分类群分为三组：具有球状顶盖的Ovata组、具有粗疣状顶盖的Major组和具有细长疣状顶盖的Lanceolata组。多变量分析表明，花粉形态在亚属和切片水平上没有分类学意义，但对于种下水平的定界和了解物种水平的形态多样性也很有用。