小孢子进一步发育形成正常的花粉粒。

Microspores further develop to form normal pollen.

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本文还讨论了成熟花粉粒败育时期和败育形态的划分。

Division of mature pollens abortive stage and shape were also discussed in this paper.

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结论：续断属为一自然分类群，花粉粒的细微差异对种的划分有一定意义。

Conclusion: Dipsacus is a natural class group, and the slight difference of its poll...

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结论：续断属为一自然分类群，花粉粒的细微差异对种的划分有一定意义。

Conclusion: Dipsacus is a natural class group, and the slight difference of its poll...

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