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On the identity of Desmatodon meridionalis Luisier

fire in the study sites. Archidium acanthophyllum was found on almost every granitic in selberg and was present in most of the sites. As the moss was previously known from east and southern Africa, the present record represents a notable extension of its range in Africa. A. acanthophyllum frequently occurred in association with the grass-like Cyanotis lanata Benth (Commelinaceae) on inselbergs. The continuous survival of this moss appears to be partly due to the protection afforded by C. lanata and partly to its vigorous capacity for vegetative reproduction, involving rapid regeneration of the partially burnt moss cushions and by production of innovations from the old gametophytes. Bryum eatonii was collected once, during the dry season, on the exposed abutment of a bridge in compartment 5 (Fig. 2). It was not found during subsequent visits to the site. The most plausible explanation for the temporary niche of this species is that, when the abutment of the bridge is submerged during the rainy season, the water current washes off the bryophyte population. The paucity of liverworts and preponderance of mosses in the present study sites is indicative of dry savanna, where the susceptibility to desiccation of the former species precludes them from very dry areas. Tree bark seems to provide some protection for corticolous bryophytes against bush burning, thereby supporting the preponderance of mosses in the study sites. We thank Bibbie Oyesiku for helpful collection and sorting of the specimens.