A revision of Grimmia (Grimmiaceae) from South Africa and Lesotho

A revision of Grimmia Hedw. (Grimmiaceae) from South Africa and Lesotho based on specimens housed in BM, BOL, G, PRE, and STU, as well as type material from B, BM, BOL, FH, G, H-BR, H-SOL, NY, and PRE, is presented. Thirteen species are recognized for South Africa and Lesotho : Grimmia consobrina Mull. Hal., Grimmia donniana Sm., Grimmia elongata Kaulf., Grimmia fuscolutea Hook., Grimmia kidderi James, Grimmia laevigata (Brid.) Brid., Grimmia longirostris Hook., Grimmia montana Bruch & Schimp., Grimmia orbicularis Wilson, Grimmia pulvinata (Hedw.) Sm., Grimmia pygmaea Mull. Hal., Grimmia sessitana De Not. and Grimmia tortuosa Hook. f. & Wilson. Keys based on morphological features, with an emphasis on costal characters, are provided. Each species is described and illustrated using key morphological and anatomical characters, such as transverse sections of leaves. Methods of specimen preparation are also explained and a glossary is supplied. Information on the geographical as well as altitudinal distribution of each species is given, with species distribution maps provided for the area covered by this study.