Two names from South America, Grimmia stenophyxis Ther. from Ecuador a
nd G. itatiaiensis Broth. from Brazil, are synonyms of G. affinis Horn
sch. Grimmia strictifolia Mitt. from Sikkim is synonymous with G. atra
ta Mielich. ex Hornsch. Grimmia nepalensis and G. inflectens, both des
cribed by Mitten from Nepal are synonymous. Grimmia scabrifolia Broth.
from Hawaii is synonymous with Schistidium strictum (Turn.) Loeske ex
O. Mart. and G. ehlei Arnell from Siberia is synonymous with Schistid
ium tenerum (Zett.) Nyh. In all, six new synonyms are reported here fo
r Grimmia and Schistidium.