A Synopsis of Hedw. (Dicranaceae, Bryophyta) in China, with Special References to Four Species Newly Reported and Re-Evaluation of Klazenga.

Hedw. is a highly diverse and widely distributed genus within Dicranaceae. The species diversity and distribution of this genus in China, however, remain not well known. A new revision of in China using morphological and molecular phylogenetic methods confirms that China has 39 species, including four newly reported species, Tubanova & Ignatova, Engelmark, Ignatova & Tubanova, and J.E.Zetterst. Klazenga is transferred to (Renauld) Renauld as a new synonym of Broth. Two species, (Lindb.) Lindb. and (Sull. & Lesq.) Lindb. are excluded from the bryoflora of China. A key to the Chinese species is also provided. These results indicate an underestimation of the distribution range of numerous species, underscoring the need for further in-depth investigations into the worldwide diversity.