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A check-list of the Hepaticae and Anthocerotae from Central Africa (Zaire, Rwanda, Burundi) is presented. 267 liverwort species and 4 hornworts are recognized for the area. For Zaire 215 Hepaticae and 3 species of Anthocerotae are recorded. In Rwanda 150 liverworts and one hornwort have been found. Burundi is far less known and only 48 Hepaticae are recorded.
A short survey of the bryological exploration of Rwanda and Zaire is provided. The first to collect bryophytes in the area was Stuhlmann in 1891 on Ruwenzori. The first bryological collections from Rwanda were made by Mildbraed in 1907. In 1929 Humbert made the first gatherings on Mt. Kahuzi and Mt. Biega. Since then a lot of botanist have collected mosses and liverworts so that Rwanda and eastern Zaire can be regarded as well known. From most parts of Zaire and from Burundi however only few data are hitherto available.
A survey of the families Trichocoleaceae, Geocalycaceae, Acrobolbaceae, Balantiopsidaceae, Lepidoziaceae (Telaranea, Arachniopsis), Calypogeiaceae, Adelanthaceae, Porellaceae, Jubulaceae, Marchantiaceae (Dumortiera) (Hepaticae) and Polytrichaceae (Musci) for Central Africa (Zaire and Rwanda) is presented. Leptoscyphus infuscatus, Tylimanthus ruwenzoriensis, Calypogeia fissa, Adelanthus lindenbergianus and Porella subdentata are recorded as new to Rwanda. Telaranea trifida and Calypogeia fusca are new to Zaire. Leptoscyphus hedbergii and Calypogeia afrocaerulea are new records for Zaire and Rwanda.
During the BRYOTROP-Expedition in 1991, 71 collecting sites could be visited. These are situated in the Kahuzi-Biega-National Park/Zaire, the Nyungwe Forest and the Virunga volcanoes/Rwanda. This paper provides a short description of the vegetation in these three areas and a detailed list of all collecting sites.