New combinations are proposed for species of Anagallis, Pelletiera and Trientalis in accordance with the results of phylogenetic analyses of the Lysimachia complex, based on molecular and morphological data. These three genera as well as Glaux and Asterolinon, for the species of which names in Lysimachia are already available, have been found to be derived, specialized groups that have evolved within Lysimachia. The present classification therefore does not reflect our current understanding of evolutionary relationships within the Lysimachia complex. Merging all the genera in Lysimachia is here considered better than splitting the latter into several smaller genera. For Anagallis crassifolia and A. filifolia new names are validated and for A. alternifolia and A. pumila the names change since their epithets have already been used in Lysimachia. Lectotypes are selected for A. filifolia, A. filiformis, A. kingaënsis, A. monelli, A. schliebenii, A. serpens and Pelletiera verna, and a neotype is designated for A. foemina.
Willdenowia is an international peer-reviewed journal publishing original research papers in English from the entire fields of plant, algal and fungal systematics, covering the evolution, taxonomy and nomenclature of these organisms as well as related fields such as floristics and plant geography. Three issues appear each year (in April, August and December) in an open-access online edition and a print edition. Individual papers may be published in the online edition as fast-track articles ahead of inclusion in these issues.