Recent molecular phylogenies have demonstrated that Pleurostachys (Cyperaceae) should be recognized as a section within Rhynchospora. Here all accepted species of Pleurostachys are transferred to Rhynchospora sect. Pleurostachys, five new combinations are made, and one new name provided. Rhynchospora austrobahiensis and R. contraligularis are described as new species endemic to the Atlantic forest of southern Bahia, Brazil. They are distinct from all other species of sect. Pleurostachys by having spikelets that are never clustered and basal leaves over 1 cm wide. The summit of the inner band of the leaf sheath on R. austrobahiensis is concave to triangular while that of R. contraligularis is arched with a distinct, chartaceous contraligule. Both species are illustrated and compared to other species of Rhynchospora sect. Pleurostachys.

中文翻译：

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来自巴西巴伊亚州的丝孢菌属（Cyperaceae）两个新种和丝孢菌属部分 Pleurostachys 的新组合

最近的分子系统发育表明 Pleurostachys (Cyperaceae) 应该被认为是 Rhynchospora 中的一个部分。在这里，所有被接受的 Pleurostachys 物种都被转移到 Rhynchospora sect。Pleurostachys，制作了五种新组合，并提供了一种新名称。Rhynchospora austrobahiensis 和 R. contraligularis 被描述为巴西巴伊亚南部大西洋森林特有的新物种。它们不同于所有其他宗派物种。Pleurostachys 具有从不聚集的小穗和超过 1 厘米宽的基生叶。R. austrobahiensis 的叶鞘内带的顶端呈凹形至三角形，而 R. contraligularis 的叶鞘内带的顶端呈拱形，带有明显的、图状的弯叶。这两个物种都被说明并与Rhynchopora sect 的其他物种进行了比较。胸针。