2026/05/27 by Xiao-chen Li, Bin‐Jie Ge, Zhi-Jin Wu +1 · 1 voice
Agricultural and Biological Sciences · Biochemistry, Genetics and Molecular Biology · #Genomics and Phylogenetic Studies #Plant Diversity and Evolution #Plant Pathogens and Fungal Diseases
paper · pdf · doi:10.5091/plecevo.176521
openalex publication_date 2026/05/27 · openalex created_date 2026/05/28 · openalex updated_date 2026/07/02
Background and aims – Lysimachia peduncularis has not been recorded in China for nearly half a century. Its recent rediscovery in southern Yunnan provides a critical opportunity to update its taxonomic description, clarify its nomenclatural history, and re-evaluate its systematic placement using comprehensive genomic data. Material and methods – We conducted detailed comparative morphological analysis based on newly collected specimens. Molecular phylogenetic relationships were reconstructed using nrITS, three plastid DNA regions ( atpF-atpH , trnL-trnF , and rpl32-trnL ), and the first reported complete plastome for this species. Key results – Phylogenomic evidence strongly supports L. peduncularis as sister to a clade comprising L. laxa and L. lancifolia , nested firmly within L. subg. Idiophyton . This robust placement revises its traditional classification, which was based solely on morphology. Notably, L. peduncularis exhibits an atypical ratio of filament-to-anther length, departing from the general pattern observed in Lysimachia . While this trait remains a key diagnostic character for the subgenus, its variation in this species underscores the need for caution when using single morphological traits for infrageneric classification. Conclusion – This rediscovery not only confirms the current status of L. peduncularis in China and expands its known distribution but also resolves its phylogenetic position. These findings contribute to a more nuanced understanding of the evolutionary history and character evolution within Lysimachia .