Lysimachia × glabrophora (Ericales, Primulaceae), a new wild nothospecies from the Republic of Korea

The genus Lysimachia (Primulaceae) is taxonomically complex, particularly within sect. Spicatae in East Asia. Field surveys in the Republic of Korea revealed a taxon exhibiting intermediate morphological states between L. barystachys and L. fortunei, including variation in leaf length-to-width ratio, raceme architecture, and floral density at the apex.

Principal component analysis (PCA) of morphological traits positioned the putative hybrid between the parental taxa, forming a distinguishable cluster despite partial overlap. Phylogenetic analyses based on nrITS and plastome data revealed cytonuclear discordance, consistent with a hybrid origin. Integrating morphological and molecular evidence, this taxon is described as a new wild nothospecies, Lysimachia × glabrophora.