Wolski, G. J. 2017. Morphological and anatomical variability of Plagiothecium nemorale in Central Poland. — Herzogia 30: 36–50.
Species in the genus Plagiothecium are highly variable, and one of them, Plagiothecium nemorale, is often described as a complex of species. The main aim of this study is to describe intraspecific variability of this taxon based on specimens collected in central Poland. The results suggest that specimens can be separated into two groups that differ in terms of the width of the leaf at the widest point, the length of the leaf cells and the diameter of the stem.