Abstract
The pattern of cell division in Sphagnum leaflets is reviewed. The review is supplemented by data on additional cell divisions, symmetry, and the pattern of chloroplast reproduction. The results are compared with Neuburg's (1960) results about Protosphagnum nervatum from the Upper Permian. The regular shift of the spindle orientation between subsequent mitoses (exceptions occur), the temporal pattern of asymmetrical and symmetrical cell divisions, and the handedness of cell triads are described and discussed. The pattern could hardly be more regular. Additional cell divisions modify the pattern but do not really change it.
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