Altogether 193 species of mosses are reported here from tropical Africa, mostly from Kenya and Tanzania, with some very limited floristic data from Zambia, Zaire, Angola and Gabon. Brachythecium rutabulum (Hedw.) B., S. et G. is recorded for the first time in tropical Africa, and Rhynchostegium comorae (C. Muell.) Jaeg. has not been previously collected on the African mainland. Tristichium mirabile (C. Muell.) Herz., Microcampylopus laevigatus (Thér.) Giese et Frahm, Grimmia donniana Sm., Orthodontium lineare Schwaegr., Schwetschkea fabronioides (Welw. et Duby) Broth., Brachythecium sublaetum Broth. in Mildbr. and B. plumosum (Hedw.) B., S. et G. are reported for the first time in Tanzania; Bryohumbertia flavicoma (C. Muell.) Frahm and Pohlia mielichhoferiacea (C. Muell.) Broth. are new to Angola and Kenya, respectively ; and Isopterygium phlyctitheca P. Varde and Chryso-hypnum cavifolium (Dix.) Ochyra et Sharp are new reports for Zambia. In addition, many new records for the Kilimanjaro Mountains, Arusha National Park and Ngorongoro Conservation Area are provided. Four new combinations are proposed: Schizymenium cratericola (Broth. in Mildbr.) Ochyra et Sharp, S. ruwenzorense (Thér. et Nav. in Nav.) Ochyra et Sharp, Platyhypnidium hedbergii (P. Varde) Ochyra et Sharp, and Chryso-hypnum cavifolium (Dix.) Ochyra et Sharp.
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