Tryonia is a monophyletic genus of leptosporangiate ferns, composed by four species, which occur mainly in the Brazilian Atlantic Rainforest reaching to Uruguay and in forests and on rock outcrops of the Espinhaço Range. Considering its recent segregation from Eriosorus and Jamesonia, the objective of this work was to carry out the taxonomic study of Tryonia for Brazil, in order to elaborate its monograph in the Flora of Brazil 2020. The present study was based on morphological analyses of material deposited in 25 Brazilian herbaria plus some other collections deposited in foreign herbaria, recent collections made by the authors, and scanning electronic microscopy of the spores. Additionally, a revision of the literature was also carried out. Four species were recognized: T. areniticola, T. myriophylla, T. schwackeana, and T. sellowiana. We provide an identification key for the species, descriptions, illustrations, as well as geographic distribution data, comments, and list of selected specimens examined for each taxon. We also provide a list of exsiccatae containing all studied gatherings.

中文翻译：

---

Tryonia (Pteridaceae) 在巴西

Tryonia 是钩孢子蕨的单系属，由四个物种组成，主要分布在到达乌拉圭的巴西大西洋热带雨林和 Espinhaço 山脉的森林和岩石露头上。考虑到它最近与 Eriosorus 和 Jamesonia 的分离，这项工作的目的是对巴西的 Tryonia 进行分类学研究，以在 2020 年巴西植物群中详细阐述其专着。 本研究基于沉积材料的形态分析在 25 个巴西植物标本馆和一些存放在国外植物标本馆的其他收藏品中，作者最近制作的收藏品，以及孢子的扫描电子显微镜。此外，还对文献进行了修订。识别出四种物种：T. areniticola、T. myriophylla、T. schwackeana 和 T. sellowiana。我们提供物种的识别码、描述、插图以及地理分布数据、评论和为每个分类群检查的选定标本列表。我们还提供了一份包含所有研究过的聚会的 exsiccatae 列表。