A Synopsis of s. lato (Bryophyta, Orthotrichaceae) in China, with Distribution Maps and a Key to Determination.

A total of 46 species and two varieties of the traditionally interpreted genus are currently known to occur in China. They represent five genera, including (29 species), (14 species and two varieties), and and that are represented by a single species each. The fifth genus , also consisting of only one species, , is an entirely neglected representative of the China's moss flora. A list of all accepted taxa is presented and for each taxon all literature records and herbarium specimens are enumerated for provinces in which they have been recorded, and their distribution is mapped. A key to determination of Chinese orthotrichalean mosses is presented. A chronological list of 63 species and varieties and two designations, and which have never been validly published, reported from China in the years 1892-2020 is presented. Four species, , , and are excluded from the bryoflora of China and var. and are recorded for the first time from this country. Phytogeography of the Chinese taxa of the orthotrichalean mosses is considered and they are grouped into eight phytogeographical elements and five sub-elements.