Struthiopteris (Blechnaceae) has recently been classified on the basis of molecular and morphological evidence, and some of its species are now included in the sister genus Spicantopsis . However, the lack of studies on several important morphological features impedes a sound assessment of their congruence with this new systematic arrangement, as well as of their range of variation and taxonomic value in this group of ferns. Here we present a study on the spores and sporangia using both light and scanning electron microscopy in Struthiopteris and Spicantopsis , using samples of all their species, and almost all their varieties. We provide full morphological descriptions of the spores and sporangia of all these taxa. We point out that the perispore structure and ornamentation and the number and the thickness of stomium cells in the sporangium clearly distinguish both genera.

中文翻译：

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蕨类 Spicantopsis 和 Struthiopteris（Blechnaceae，Polypodiopsida）中的孢子囊和孢子

Struthiopteris（Blechnaceae）最近根据分子和形态学证据进行了分类，它的一些物种现在被包括在姐妹属 Spicantopsis 中。然而，缺乏对几个重要形态特征的研究阻碍了对它们与这种新系统排列的一致性的合理评估，以及它们在这组蕨类植物中的变异范围和分类学价值。在这里，我们使用光和扫描电子显微镜对 Struthiopteris 和 Spicantopsis 中的孢子和孢子囊进行了研究，使用了它们所有物种和几乎所有品种的样本。我们提供所有这些分类群的孢子和孢子囊的完整形态描述。