A synopsis of Plagiocheilus (Compositae: Astereae) is provided, giving full synonymy, type citations and the location of known types, together with relevant notes and commentary, and the currently accepted distribution of each taxon; the distribution of taxa is also tabulated. Six species are recognised, one containing three subspecies. A key to species is presented. One author citation is corrected following an incorrect assumption by de Candolle when describing Plagiocheilus tanacetoides. The synonymy of Polygyne inconspicua, under Eclipta prostrata, is précised once again. An index to names associated with Plagiocheilus is given, and the nomen nudum of Plagiocheilus herzogii commented upon.

提供了Plagiocheilus（菊科：Astereae）的摘要，给出了完整的同义词，类型引文和已知类型的位置，以及相关的注释和评论，以及每个分类单元的当前接受的分布；还列出了分类单元的分布。识别出六种，其中一种包含三个亚种。介绍了物种的关键。德坎多尔（ De Candolle）在描述丹参缩蛇菊（Plagiocheilus tanacetoides）时做出了错误的假设，从而纠正了一位作者的引用。再次提出了Eclipta prostrata下的Polygyne inconspicua的同义词。与相关联的名称索引Plagiocheilus，并给出了裸名的Plagiocheilus herzogii评论。