New typifications and synonyms in Tortula sect. Pottia ( Pottiaceae, Musci )

Lectotypes are designated for nineteen names applicable to species of Tortula sect. Pottia (Ehrh. ex Rchb.) Kindb. and one found to refer to Microbryum starkeanum (Hedw.) R.H. Zander. Our results show that Desmatodon gasilienii Vent., Pottia lanceolata var. lejolisii Corb., P. lanceolata var. papillosa Corb., and Tortula lindbergii Kindb. ex Broth. are all referable to the species currently known as Tortula lanceola R.H. Zander, which must, therefore, be replaced by Tortula lindbergii , published a hundred years earlier. Pottia fleischeri Warnst. is here considered to be a synonym of Tortula viridifolia (Mitt.) Blockeel & A.J.E. Smith and not of Tortula wilsonii (Hook.) R.H. Zander as proposed elsewhere. Pottia littoralis Mitt., P. notarisii Schimp., and P. propagulifera Herzog are conspecific with Tortula pallida (Lindb.) R.H. Zander. Pottia lanceolata var. leucodonta Schimp. is synonymized with Microbryum starkeanum (Hedw.) R.H. Zander. Another important change involves Tortula caucasica Lindb. ex Broth., which is considered to be conspecific with Tortula modica R.H. Zander, and must replace that name.