The most important taxonomic features of Plagiothecium ruthei f. submersum A leaf shape B leaf apex with rhizoids C cells of the middle part of the leaf D leaf insertion (based on PC0132598).

 
 
  Part of: Wolski GJ, Latoszewski M, Buck WR (2024) Why Plagiothecium sylvaticum (Brid.) Schimp. (Plagiothecium, Plagiotheciaceae) has priority over P. platyphyllum Mönk.? PhytoKeys 241: 103-120. https://doi.org/10.3897/phytokeys.241.118858