Lemna sect. Uninerves Hegelm. consists of three species, Lemna minuta Kunth (synonym L. minuscula), L. valdiviana Phil. and L. yungensis Landolt. Lemna yungensis was discovered growing on rocks in the Yungas in Bolivia by E. Landolt and was described just 20 years ago. In the original description, Landolt reported that this species is closely related to L. valdiviana and that it is difficult to distinguish the three species on a morphological basis. Therefore, the taxonomic position and status of L. yungensis remained controversial. Here, we carried out a detailed taxonomic study, integrating approaches that include quantitative morphometry, metabolomic profiling by matrix‐assisted laser desorption ionization time‐of‐flight mass spectrometry (MALDI‐TOF‐MS) as well as molecular genetic analysis using amplified fragment length polymorphism (AFLP), and barcoding of plastidic sequences. We also investigated genome sizes of clones of the three species. Whereas L. minuta can easily be differentiated from L. valdiviana and L. yungensis, it was not possible to distinguish L. valdiviana from L. yungensis with any of the methods used. These data imply that L. yungensis is identical to L. valdiviana. Thus, the name L. yungensis should be synonymised with the name L. valdiviana, since this is the older name.

中文翻译：

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Lemna宗的分类学修订。Uninerves（Lemnaceae）

Lemna教派。黑格尔大学。由三个物种组成，Lemna minuta Kunth（同义词L. minuscula），L。valdiviana Phil。以及L. yungensis Landolt。埃姆·兰多尔特（E. Landolt）在玻利维亚的云加斯（Yungas）的岩石上发现了羊草（Lemna yungensis），该植物仅在20年前就被描述过。在原始描述中，Landolt报告说该物种与L. valdiviana密切相关，并且很难在形态学基础上区分这三个物种。因此，翁氏乳杆菌的分类地位和地位仍然有争议。在这里，我们进行了详细的分类学研究，整合了包括定量形态学，通过基质辅助激光解吸电离飞行时间质谱（MALDI-TOF-MS）进行代谢组学谱分析以及使用扩增片段长度进行分子遗传分析的方法多态性（AFLP）和质体序列的条形码。我们还研究了这三个物种的克隆的基因组大小。而L.小粒可以容易地从区分L. valdiviana和L. yungensis，这是不可能区分L. valdiviana从L. yungensis与任何的使用的方法。这些数据表明，L。yungensis与L. valdiviana。因此，名称L. yungensis应该与名称L. valdiviana同义，因为这是较旧的名称。