. Bulletin of the British Museum (Natural History) Botany. . A revision of African Sphagnales Alan Eddy Department of Botany, British Museum (Natural History), Cromwell Road, London SW7 5BD Contents Synopsis 77 Historical background 77 Ecology 78 Taxonomic treatment and evolutionary history 78 Citation of specimens 80 Sphagnum L 80 Key 80 Subgenus Sphagnum 83 Subgenus Isocladus 90 Section Acutifolia 90 Section Subsecunda 99 Subsection Subsecunda 99 Subsection Acrosphagnum 116 Section Cuspidata 137 Subgenus Rigida 155 Acknowledgements 159 References 159 Index 160 Synopsis A revision of the Spha
. Bulletin of the British Museum (Natural History) Botany. . A revision of African Sphagnales Alan Eddy Department of Botany, British Museum (Natural History), Cromwell Road, London SW7 5BD Contents Synopsis 77 Historical background 77 Ecology 78 Taxonomic treatment and evolutionary history 78 Citation of specimens 80 Sphagnum L 80 Key 80 Subgenus Sphagnum 83 Subgenus Isocladus 90 Section Acutifolia 90 Section Subsecunda 99 Subsection Subsecunda 99 Subsection Acrosphagnum 116 Section Cuspidata 137 Subgenus Rigida 155 Acknowledgements 159 References 159 Index 160 Synopsis A revision of the Sphagnales of Africa and the East African islands is presented. Twenty species are recognized, and the treatment includes a key, descriptions, synonymy, figures of the taxa, and brief discussions of their status and interrelationships. Sphagnum slooveri A. Eddy sp. nov. and 5. tumidulum var. confusum A. Eddy var. nov. are described, and Acrosphagnum C. Mull is regarded as a subsection in section Subsecunda. The Asiatic species 5. cuspidatulum C. Mull, and S. ceylonicum Warnst. are recorded for the first time in Africa. The following new combinations are made: S. magellanicum Brid. subsp. grandirete (Warnst.) A. Eddy, S. truncatum Hornsch. var. bordasii (Bescher.) A. Eddy, S. planifolium C. Mull. var. angustilimbatum (Warnst.) A. Eddy, and 5. planifolium var. rugegense (Warnst.) A. Eddy. Historical background The history of Sphagnum study in Africa follows familiar lines. It began slowly and spasmodical- ly with Bridel's (1826) descriptions of 5. ericetorum and two other uncertain (and now untraceable) taxa from the East African islands, and with Hornschuch's (1841) treatment of S. truncatum and S. capense from South Africa. Little progress followed until the latter half of the century when much of the botanically unexplored regions were becoming accessible. The results of botanical exploration contained fairly numerous specimens of Sphagnum, especially from the East African islands
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